feat(admin): migrate core schema to single-pass model

admin/README.md

@@ -8,6 +8,7 @@
 | `CMBUYER_ADMIN_PASSWORD_BCRYPT` | 非空 bcrypt 密码哈希，不接受明文密码。 |
 | `CMBUYER_SESSION_SECRET` | 至少 32 字节的会话签名密钥。 |
 | `CMBUYER_COOKIE_SECURE` | 可选；存在时只能精确为 `true` 或 `false`。HTTPS 部署应设为 `true`。 |
+| `CMBUYER_DATABASE_SOURCE` | 已迁移 SQLite 的显式 data source。 |
 
 示例仅展示变量名，不提供可运行凭据：
 
@@ -16,6 +17,8 @@ $env:CMBUYER_ADMIN_USERNAME = '<管理员账号>'
 $env:CMBUYER_ADMIN_PASSWORD_BCRYPT = '<bcrypt 密码哈希>'
 $env:CMBUYER_SESSION_SECRET = '<至少 32 字节的随机密钥>'
 $env:CMBUYER_COOKIE_SECURE = 'true'
+$env:CMBUYER_DATABASE_SOURCE = '<SQLite data source>'
+go run ./cmd/migrate -database $env:CMBUYER_DATABASE_SOURCE up
 go run ./cmd/server
 ```
 

admin/cmd/server/main.go

@@ -8,6 +8,8 @@ import (
 	"cmbuyer/admin/internal/auth"
 	"cmbuyer/admin/internal/config"
 	"cmbuyer/admin/internal/server"
+	"cmbuyer/admin/internal/storage/sqlite"
+	"cmbuyer/admin/internal/tasks"
 )
 
 const listenAddress = ":8080"
@@ -23,11 +25,21 @@ func run() error {
 	if err != nil {
 		return err
 	}
+	database, err := sqlite.Open(configuration.DatabaseSource)
+	if err != nil {
+		return err
+	}
+	defer database.Close()
+	taskStore, err := tasks.NewSQLiteStore(database)
+	if err != nil {
+		return err
+	}
 
 	router, err := server.NewRouter(server.Options{
 		AdminUsername:       configuration.AdminUsername,
 		AdminPasswordBcrypt: configuration.AdminPasswordBcrypt,
 		Sessions:            auth.NewManager(configuration.SessionSecret, configuration.CookieSecure),
+		Tasks:               taskStore,
 	})
 	if err != nil {
 		return err

admin/internal/config/config.go

@@ -15,6 +15,7 @@ const (
 	adminPasswordBcryptEnv = "CMBUYER_ADMIN_PASSWORD_BCRYPT"
 	sessionSecretEnv       = "CMBUYER_SESSION_SECRET"
 	cookieSecureEnv        = "CMBUYER_COOKIE_SECURE"
+	databaseSourceEnv      = "CMBUYER_DATABASE_SOURCE"
 	minimumSecretLength    = 32
 )
 
@@ -24,6 +25,7 @@ type Config struct {
 	AdminPasswordBcrypt string
 	SessionSecret       []byte
 	CookieSecure        bool
+	DatabaseSource      string
 }
 
 // LoadFromEnv 从进程环境读取配置。错误只指出缺失或非法的变量名，绝不回显秘密。
@@ -65,12 +67,17 @@ func Load(lookup func(string) (string, bool)) (Config, error) {
 			return Config{}, fmt.Errorf("%s must be exactly true or false", cookieSecureEnv)
 		}
 	}
+	databaseSource, err := required(lookup, databaseSourceEnv)
+	if err != nil {
+		return Config{}, err
+	}
 
 	return Config{
 		AdminUsername:       username,
 		AdminPasswordBcrypt: passwordHash,
 		SessionSecret:       []byte(secret),
 		CookieSecure:        cookieSecure,
+		DatabaseSource:      databaseSource,
 	}, nil
 }
 

admin/internal/config/config_test.go

@@ -20,6 +20,7 @@ func TestLoad(t *testing.T) {
 		"CMBUYER_ADMIN_PASSWORD_BCRYPT": string(hash),
 		"CMBUYER_SESSION_SECRET":        strings.Repeat("s", 32),
 		"CMBUYER_COOKIE_SECURE":         "true",
+		"CMBUYER_DATABASE_SOURCE":       ":memory:",
 	}
 
 	got, err := config.Load(lookup(values))
@@ -41,6 +42,7 @@ func TestLoadRejectsMissingOrInvalidConfiguration(t *testing.T) {
 		"CMBUYER_ADMIN_USERNAME":        "admin",
 		"CMBUYER_ADMIN_PASSWORD_BCRYPT": string(hash),
 		"CMBUYER_SESSION_SECRET":        strings.Repeat("s", 32),
+		"CMBUYER_DATABASE_SOURCE":       ":memory:",
 	}
 
 	tests := []struct {
@@ -52,6 +54,7 @@ func TestLoadRejectsMissingOrInvalidConfiguration(t *testing.T) {
 		{"invalid bcrypt", func(values map[string]string) { values["CMBUYER_ADMIN_PASSWORD_BCRYPT"] = "not-a-bcrypt-hash" }, "CMBUYER_ADMIN_PASSWORD_BCRYPT"},
 		{"short secret", func(values map[string]string) { values["CMBUYER_SESSION_SECRET"] = "short" }, "CMBUYER_SESSION_SECRET"},
 		{"invalid secure flag", func(values map[string]string) { values["CMBUYER_COOKIE_SECURE"] = "1" }, "CMBUYER_COOKIE_SECURE"},
+		{"missing database", func(values map[string]string) { delete(values, "CMBUYER_DATABASE_SOURCE") }, "CMBUYER_DATABASE_SOURCE"},
 	}
 
 	for _, test := range tests {

admin/internal/domain/authorization.go

@@ -10,28 +10,24 @@ var ErrInvalidAuthorizationTransition = errors.New("invalid authorization status
 type AuthorizationStatus string
 
 const (
-	AuthorizationStatusPendingDelivery AuthorizationStatus = "PENDING_DELIVERY"
-	AuthorizationStatusDelivered       AuthorizationStatus = "DELIVERED"
-	AuthorizationStatusAcknowledged    AuthorizationStatus = "ACKNOWLEDGED"
-	AuthorizationStatusExecuting       AuthorizationStatus = "EXECUTING"
+	AuthorizationStatusActive    AuthorizationStatus = "ACTIVE"
+	AuthorizationStatusClaimed   AuthorizationStatus = "CLAIMED"
 	AuthorizationStatusFenced    AuthorizationStatus = "FENCED"
 	AuthorizationStatusConsumed  AuthorizationStatus = "CONSUMED"
-	AuthorizationStatusSuperseded      AuthorizationStatus = "SUPERSEDED"
 	AuthorizationStatusExpired   AuthorizationStatus = "EXPIRED"
+	AuthorizationStatusAbandoned AuthorizationStatus = "ABANDONED"
 )
 
 type OrderAuthorization struct {
 	ID            string
 	TaskID        string
-	SpecTrialID         string
-	Version             int
+	TaskVersion   int
+	StartKey      string
 	GoodsID       string
 	SKUColor      string
 	SKUSize       string
 	Quantity      int
-	AuthorizedUnitPrice string
 	TotalPriceCap string
-	Note                *string
 	Status        AuthorizationStatus
 	CreatedBy     string
 	CreatedAt     time.Time
@@ -54,25 +50,15 @@ func TransitionAuthorization(current, next AuthorizationStatus) (AuthorizationSt
 }
 
 var authorizationTransitions = map[AuthorizationStatus]map[AuthorizationStatus]struct{}{
-	AuthorizationStatusPendingDelivery: {
-		AuthorizationStatusDelivered:  {},
-		AuthorizationStatusSuperseded: {},
+	AuthorizationStatusActive: {
+		AuthorizationStatusClaimed:   {},
 		AuthorizationStatusExpired:   {},
+		AuthorizationStatusAbandoned: {},
 	},
-	AuthorizationStatusDelivered: {
-		AuthorizationStatusAcknowledged: {},
-		AuthorizationStatusSuperseded:   {},
-		AuthorizationStatusExpired:      {},
-	},
-	AuthorizationStatusAcknowledged: {
-		AuthorizationStatusExecuting:  {},
-		AuthorizationStatusSuperseded: {},
-		AuthorizationStatusExpired:    {},
-	},
-	AuthorizationStatusExecuting: {
+	AuthorizationStatusClaimed: {
 		AuthorizationStatusFenced:    {},
-		AuthorizationStatusSuperseded: {},
 		AuthorizationStatusExpired:   {},
+		AuthorizationStatusAbandoned: {},
 	},
 	AuthorizationStatusFenced: {
 		AuthorizationStatusConsumed: {},

admin/internal/domain/authorization_test.go

@@ -14,19 +14,17 @@ func TestAuthorizationTransitions(t *testing.T) {
 		next    domain.AuthorizationStatus
 		allowed bool
 	}{
-		{"deliver", domain.AuthorizationStatusPendingDelivery, domain.AuthorizationStatusDelivered, true},
-		{"acknowledge", domain.AuthorizationStatusDelivered, domain.AuthorizationStatusAcknowledged, true},
-		{"execute", domain.AuthorizationStatusAcknowledged, domain.AuthorizationStatusExecuting, true},
-		{"fence", domain.AuthorizationStatusExecuting, domain.AuthorizationStatusFenced, true},
+		{"claim", domain.AuthorizationStatusActive, domain.AuthorizationStatusClaimed, true},
+		{"fence", domain.AuthorizationStatusClaimed, domain.AuthorizationStatusFenced, true},
 		{"consume fenced authorization", domain.AuthorizationStatusFenced, domain.AuthorizationStatusConsumed, true},
-		{"expire pending delivery", domain.AuthorizationStatusPendingDelivery, domain.AuthorizationStatusExpired, true},
-		{"supersede pending delivery", domain.AuthorizationStatusPendingDelivery, domain.AuthorizationStatusSuperseded, true},
-		{"expire before fence", domain.AuthorizationStatusExecuting, domain.AuthorizationStatusExpired, true},
-		{"supersede before fence", domain.AuthorizationStatusDelivered, domain.AuthorizationStatusSuperseded, true},
+		{"expire active", domain.AuthorizationStatusActive, domain.AuthorizationStatusExpired, true},
+		{"abandon active", domain.AuthorizationStatusActive, domain.AuthorizationStatusAbandoned, true},
+		{"expire claimed before fence", domain.AuthorizationStatusClaimed, domain.AuthorizationStatusExpired, true},
+		{"abandon claimed before fence", domain.AuthorizationStatusClaimed, domain.AuthorizationStatusAbandoned, true},
 		{"fenced authorization cannot expire", domain.AuthorizationStatusFenced, domain.AuthorizationStatusExpired, false},
-		{"fenced authorization cannot be superseded", domain.AuthorizationStatusFenced, domain.AuthorizationStatusSuperseded, false},
-		{"fenced authorization cannot be delivered again", domain.AuthorizationStatusFenced, domain.AuthorizationStatusDelivered, false},
-		{"consumed authorization cannot restart", domain.AuthorizationStatusConsumed, domain.AuthorizationStatusDelivered, false},
+		{"fenced authorization cannot be abandoned", domain.AuthorizationStatusFenced, domain.AuthorizationStatusAbandoned, false},
+		{"fenced authorization cannot be claimed again", domain.AuthorizationStatusFenced, domain.AuthorizationStatusClaimed, false},
+		{"consumed authorization cannot restart", domain.AuthorizationStatusConsumed, domain.AuthorizationStatusClaimed, false},
 	}
 
 	for _, test := range tests {

admin/internal/domain/purchase_attempt.go

@@ -0,0 +1,74 @@
+package domain
+
+import (
+	"errors"
+	"time"
+)
+
+var ErrInvalidAttemptTransition = errors.New("invalid purchase attempt status transition")
+
+// AttemptStatus 只描述单趟领取的可恢复执行。真实提交结果独立由唯一围栏记录调和。
+type AttemptStatus string
+
+const (
+	AttemptStatusClaimed   AttemptStatus = "CLAIMED"
+	AttemptStatusOrdering  AttemptStatus = "ORDERING"
+	AttemptStatusFailed    AttemptStatus = "FAILED"
+	AttemptStatusFenced    AttemptStatus = "FENCED"
+	AttemptStatusAbandoned AttemptStatus = "ABANDONED"
+)
+
+// AttemptFailureCode 是服务端可审计的固定失败摘要，不能承载页面正文或其他自由文本。
+type AttemptFailureCode string
+
+const (
+	AttemptFailureAuthorizationExpired AttemptFailureCode = "AUTHORIZATION_EXPIRED"
+	AttemptFailureLeaseLost            AttemptFailureCode = "LEASE_LOST"
+	AttemptFailureGate1Rejected        AttemptFailureCode = "GATE_1_REJECTED"
+	AttemptFailureQuantityMismatch     AttemptFailureCode = "QUANTITY_MISMATCH"
+	AttemptFailureGate2Rejected        AttemptFailureCode = "GATE_2_REJECTED"
+	AttemptFailureGate3Rejected        AttemptFailureCode = "GATE_3_REJECTED"
+	AttemptFailureFenceRejected        AttemptFailureCode = "FENCE_REJECTED"
+	AttemptFailureSafeAborted          AttemptFailureCode = "SAFE_ABORTED"
+)
+
+type PurchaseAttempt struct {
+	ID              string
+	TaskID          string
+	AuthorizationID string
+	ClaimGeneration int
+	Status          AttemptStatus
+	Gate1UnitPrice  *string
+	Gate2UnitPrice  *string
+	QuantityRead    *int
+	ConfirmAmount   *string
+	FailureCode     *AttemptFailureCode
+	StartedAt       time.Time
+	FinishedAt      *time.Time
+}
+
+// CanTransitionTo 只允许围栏前的领取恢复为安全失败；围栏后不再提供回退或重试路径。
+func (status AttemptStatus) CanTransitionTo(next AttemptStatus) bool {
+	_, allowed := attemptTransitions[status][next]
+	return allowed
+}
+
+func TransitionAttempt(current, next AttemptStatus) (AttemptStatus, error) {
+	if !current.CanTransitionTo(next) {
+		return current, ErrInvalidAttemptTransition
+	}
+	return next, nil
+}
+
+var attemptTransitions = map[AttemptStatus]map[AttemptStatus]struct{}{
+	AttemptStatusClaimed: {
+		AttemptStatusOrdering:  {},
+		AttemptStatusFailed:    {},
+		AttemptStatusAbandoned: {},
+	},
+	AttemptStatusOrdering: {
+		AttemptStatusFenced:    {},
+		AttemptStatusFailed:    {},
+		AttemptStatusAbandoned: {},
+	},
+}

admin/internal/domain/purchase_attempt_test.go

@@ -0,0 +1,34 @@
+package domain_test
+
+import (
+	"errors"
+	"testing"
+
+	"cmbuyer/admin/internal/domain"
+)
+
+func TestPurchaseAttemptTransitions(t *testing.T) {
+	for _, test := range []struct {
+		current domain.AttemptStatus
+		next    domain.AttemptStatus
+		allowed bool
+	}{
+		{domain.AttemptStatusClaimed, domain.AttemptStatusOrdering, true},
+		{domain.AttemptStatusOrdering, domain.AttemptStatusFenced, true},
+		{domain.AttemptStatusOrdering, domain.AttemptStatusFailed, true},
+		{domain.AttemptStatusFenced, domain.AttemptStatusOrdering, false},
+		{domain.AttemptStatusFenced, domain.AttemptStatusAbandoned, false},
+		{domain.AttemptStatus("UNKNOWN"), domain.AttemptStatusOrdering, false},
+	} {
+		got, err := domain.TransitionAttempt(test.current, test.next)
+		if test.allowed {
+			if err != nil || got != test.next {
+				t.Fatalf("TransitionAttempt(%s, %s) = (%s, %v)", test.current, test.next, got, err)
+			}
+			continue
+		}
+		if !errors.Is(err, domain.ErrInvalidAttemptTransition) || got != test.current {
+			t.Fatalf("invalid TransitionAttempt(%s, %s) = (%s, %v)", test.current, test.next, got, err)
+		}
+	}
+}

admin/internal/domain/spec_trial.go

@@ -1,16 +0,0 @@
-package domain
-
-import "time"
-
-type SpecTrial struct {
-	ID             string
-	TaskID         string
-	Attempt        int
-	ProductTitle   string
-	SelectedColor  string
-	SelectedSize   string
-	UnitPrice      string
-	TotalPrice     string
-	EvidenceSHA256 string
-	CreatedAt      time.Time
-}

admin/internal/domain/submission.go

@@ -20,12 +20,12 @@ type OrderSubmission struct {
 	ID              string
 	TaskID          string
 	AuthorizationID string
-	CommandID         string
-	DryRunID          string
+	AttemptID       string
 	Status          SubmissionStatus
-	VerifiedUnitPrice string
+	Gate1UnitPrice  string
+	Gate2UnitPrice  string
 	QuantityRead    int
-	ConfirmPageAmount string
+	ConfirmAmount   string
 	CreatedAt       time.Time
 	ResolvedAt      *time.Time
 }

admin/internal/domain/submission_test.go

@@ -20,6 +20,7 @@ func TestSubmissionTransitions(t *testing.T) {
 		{"cannot reopen fenced submission", domain.SubmissionStatusSubmitted, domain.SubmissionStatusFenced, false},
 		{"submitted cannot require reconciliation", domain.SubmissionStatusSubmitted, domain.SubmissionStatusReconciliationRequired, false},
 		{"cannot skip reconciliation", domain.SubmissionStatusFenced, domain.SubmissionStatusManualResolved, false},
+		{"manual resolution cannot create a second submission", domain.SubmissionStatusManualResolved, domain.SubmissionStatusFenced, false},
 	}
 
 	for _, test := range tests {

admin/internal/domain/task.go

@@ -14,15 +14,12 @@ const (
 	TaskStatusDraft                  TaskStatus = "DRAFT"
 	TaskStatusPending                TaskStatus = "PENDING"
 	TaskStatusClaimed                TaskStatus = "CLAIMED"
-	TaskStatusRunning                TaskStatus = "RUNNING"
-	TaskStatusWaitingConfirmation    TaskStatus = "WAITING_CONFIRMATION"
-	TaskStatusPendingRetrial         TaskStatus = "PENDING_RETRIAL"
-	TaskStatusAuthorized             TaskStatus = "AUTHORIZED"
 	TaskStatusOrdering               TaskStatus = "ORDERING"
 	TaskStatusWaitingPayment         TaskStatus = "WAITING_PAYMENT"
 	TaskStatusReconciliationRequired TaskStatus = "RECONCILIATION_REQUIRED"
 	TaskStatusNeedsManual            TaskStatus = "NEEDS_MANUAL"
 	TaskStatusSucceeded              TaskStatus = "SUCCEEDED"
+	TaskStatusFailed                 TaskStatus = "FAILED"
 	TaskStatusCanceled               TaskStatus = "CANCELED"
 )
 
@@ -69,34 +66,31 @@ func TransitionTask(current, next TaskStatus) (TaskStatus, error) {
 var taskTransitions = map[TaskStatus]map[TaskStatus]struct{}{
 	TaskStatusDraft: {
 		TaskStatusPending:  {},
+		TaskStatusCanceled: {},
 	},
 	TaskStatusPending: {
 		TaskStatusClaimed:  {},
-	},
-	TaskStatusPendingRetrial: {
-		TaskStatusClaimed: {},
+		TaskStatusDraft:    {},
+		TaskStatusCanceled: {},
 	},
 	TaskStatusClaimed: {
-		TaskStatusRunning: {},
-		TaskStatusPending: {},
-	},
-	TaskStatusRunning: {
-		TaskStatusWaitingConfirmation: {},
-		TaskStatusNeedsManual:         {},
-	},
-	TaskStatusWaitingConfirmation: {
-		TaskStatusCanceled:   {},
-		TaskStatusAuthorized: {},
-	},
-	TaskStatusAuthorized: {
 		TaskStatusOrdering: {},
+		TaskStatusDraft:    {},
 	},
 	TaskStatusOrdering: {
 		TaskStatusNeedsManual:            {},
 		TaskStatusWaitingPayment:         {},
 		TaskStatusReconciliationRequired: {},
 	},
+	TaskStatusNeedsManual: {
+		TaskStatusDraft:    {},
+		TaskStatusCanceled: {},
+	},
 	TaskStatusWaitingPayment: {
 		TaskStatusSucceeded: {},
 	},
+	TaskStatusReconciliationRequired: {
+		TaskStatusWaitingPayment: {},
+		TaskStatusFailed:         {},
+	},
 }

admin/internal/domain/task_test.go

@@ -14,22 +14,24 @@ func TestTaskTransitions(t *testing.T) {
 		next    domain.TaskStatus
 		allowed bool
 	}{
-		{"start trial", domain.TaskStatusDraft, domain.TaskStatusPending, true},
-		{"claim trial", domain.TaskStatusPending, domain.TaskStatusClaimed, true},
-		{"claim retrial", domain.TaskStatusPendingRetrial, domain.TaskStatusClaimed, true},
-		{"start trial execution", domain.TaskStatusClaimed, domain.TaskStatusRunning, true},
-		{"release unstarted claim", domain.TaskStatusClaimed, domain.TaskStatusPending, true},
-		{"trial completes", domain.TaskStatusRunning, domain.TaskStatusWaitingConfirmation, true},
-		{"trial needs manual review", domain.TaskStatusRunning, domain.TaskStatusNeedsManual, true},
-		{"authorize confirmed trial", domain.TaskStatusWaitingConfirmation, domain.TaskStatusAuthorized, true},
-		{"reject confirmed trial", domain.TaskStatusWaitingConfirmation, domain.TaskStatusCanceled, true},
-		{"start authorized order leg", domain.TaskStatusAuthorized, domain.TaskStatusOrdering, true},
+		{"start purchase", domain.TaskStatusDraft, domain.TaskStatusPending, true},
+		{"cancel draft before fence", domain.TaskStatusDraft, domain.TaskStatusCanceled, true},
+		{"claim purchase", domain.TaskStatusPending, domain.TaskStatusClaimed, true},
+		{"release expired authorization", domain.TaskStatusPending, domain.TaskStatusDraft, true},
+		{"start ordering", domain.TaskStatusClaimed, domain.TaskStatusOrdering, true},
+		{"release unstarted claim", domain.TaskStatusClaimed, domain.TaskStatusDraft, true},
+		{"ordering needs manual review", domain.TaskStatusOrdering, domain.TaskStatusNeedsManual, true},
 		{"order reaches payment", domain.TaskStatusOrdering, domain.TaskStatusWaitingPayment, true},
 		{"order needs manual review before fence", domain.TaskStatusOrdering, domain.TaskStatusNeedsManual, true},
 		{"order needs reconciliation", domain.TaskStatusOrdering, domain.TaskStatusReconciliationRequired, true},
+		{"manual review resets draft", domain.TaskStatusNeedsManual, domain.TaskStatusDraft, true},
+		{"manual review cancels before fence", domain.TaskStatusNeedsManual, domain.TaskStatusCanceled, true},
 		{"payment verified", domain.TaskStatusWaitingPayment, domain.TaskStatusSucceeded, true},
-		{"cannot skip trial", domain.TaskStatusDraft, domain.TaskStatusAuthorized, false},
-		{"trial cannot enter order leg", domain.TaskStatusRunning, domain.TaskStatusOrdering, false},
+		{"reconcile confirms waiting payment", domain.TaskStatusReconciliationRequired, domain.TaskStatusWaitingPayment, true},
+		{"reconcile confirms failed", domain.TaskStatusReconciliationRequired, domain.TaskStatusFailed, true},
+		{"cannot skip authorization", domain.TaskStatusDraft, domain.TaskStatusOrdering, false},
+		{"ordering cannot return pending", domain.TaskStatusOrdering, domain.TaskStatusPending, false},
+		{"ordering cannot bypass manual review to draft", domain.TaskStatusOrdering, domain.TaskStatusDraft, false},
 		{"terminal task cannot restart", domain.TaskStatusSucceeded, domain.TaskStatusPending, false},
 		{"unknown status is rejected", domain.TaskStatus("UNKNOWN"), domain.TaskStatusPending, false},
 	}

admin/internal/migrations/migrations_test.go

@@ -3,8 +3,11 @@ package migrations_test
 import (
 	"context"
 	"database/sql"
+	"os"
 	"path/filepath"
 	"runtime"
+	"strconv"
+	"strings"
 	"testing"
 
 	"cmbuyer/admin/internal/migrations"
@@ -13,6 +16,8 @@ import (
 	"github.com/pressly/goose/v3"
 )
 
+const migrationTime = "2026-08-04T00:00:00Z"
+
 func TestUpDownAndIdempotence(t *testing.T) {
 	database := openTestDatabase(t)
 	directory := migrationDirectory(t)
@@ -21,173 +26,325 @@ func TestUpDownAndIdempotence(t *testing.T) {
 	if err := migrations.Up(context, database, directory); err != nil {
 		t.Fatalf("apply migrations: %v", err)
 	}
-	assertVersion(t, database, 1)
+	assertVersion(t, database, 2)
 	assertTableExists(t, database, "tasks", true)
-	assertTableExists(t, database, "spec_trials", true)
+	assertTableExists(t, database, "spec_trials", false)
 	assertTableExists(t, database, "order_authorizations", true)
+	assertTableExists(t, database, "purchase_attempts", true)
 	assertTableExists(t, database, "order_submissions", true)
+	assertTableExists(t, database, "single_pass_upgrade_guard", false)
 
 	if err := migrations.Up(context, database, directory); err != nil {
 		t.Fatalf("reapply migrations: %v", err)
 	}
-	assertVersion(t, database, 1)
+	assertVersion(t, database, 2)
 
 	if err := migrations.Down(context, database, directory); err != nil {
-		t.Fatalf("roll back migration: %v", err)
-	}
-	assertVersion(t, database, 0)
-	assertTableExists(t, database, "tasks", false)
-	assertTableExists(t, database, "spec_trials", false)
-	assertTableExists(t, database, "order_authorizations", false)
-	assertTableExists(t, database, "order_submissions", false)
-
-	if err := migrations.Up(context, database, directory); err != nil {
-		t.Fatalf("apply migration after rollback: %v", err)
+		t.Fatalf("roll back v2 migration: %v", err)
 	}
 	assertVersion(t, database, 1)
+	assertTableExists(t, database, "spec_trials", true)
+	assertTableExists(t, database, "purchase_attempts", false)
+	assertTableExists(t, database, "single_pass_downgrade_guard", false)
+
+	if err := migrations.Up(context, database, directory); err != nil {
+		t.Fatalf("reapply v2 after rollback: %v", err)
+	}
+	assertVersion(t, database, 2)
 }
 
-func TestSchemaConstraints(t *testing.T) {
+func TestUpgradePreservesManualDraftLosslessly(t *testing.T) {
+	database := openTestDatabase(t)
+	migrateToV1(t, database)
+	if _, err := database.Exec(`
+		INSERT INTO tasks (
+			id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price,
+			reference_asset_id, status, version, created_at, updated_at
+		) VALUES ('draft-one', 'MANUAL', 'source-ref', 'title', 'goods', 'white', 'XL', 2, '80.50',
+			'asset-id', 'DRAFT', 7, '2026-08-03T00:00:00Z', '2026-08-03T01:00:00Z')
+	`); err != nil {
+		t.Fatalf("insert v1 draft: %v", err)
+	}
+
+	if err := migrations.Up(context.Background(), database, migrationDirectory(t)); err != nil {
+		t.Fatalf("upgrade v1 draft: %v", err)
+	}
+	assertVersion(t, database, 2)
+	var got struct {
+		id, source, sourceRef, title, goodsID, color, size, maxPrice, assetID, status, created, updated string
+		quantity, version                                                                               int
+	}
+	if err := database.QueryRow(`SELECT id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price, reference_asset_id, status, version, created_at, updated_at FROM tasks WHERE id = 'draft-one'`).Scan(
+		&got.id, &got.source, &got.sourceRef, &got.title, &got.goodsID, &got.color, &got.size, &got.quantity, &got.maxPrice, &got.assetID, &got.status, &got.version, &got.created, &got.updated,
+	); err != nil {
+		t.Fatalf("read upgraded draft: %v", err)
+	}
+	if got != (struct {
+		id, source, sourceRef, title, goodsID, color, size, maxPrice, assetID, status, created, updated string
+		quantity, version                                                                               int
+	}{"draft-one", "MANUAL", "source-ref", "title", "goods", "white", "XL", "80.50", "asset-id", "DRAFT", "2026-08-03T00:00:00Z", "2026-08-03T01:00:00Z", 2, 7}) {
+		t.Fatalf("upgraded draft changed: %#v", got)
+	}
+}
+
+func TestUpgradeRejectsLegacyExecutionDataAtomically(t *testing.T) {
+	tests := []struct {
+		name  string
+		setup func(*testing.T, *sql.DB)
+	}{
+		{"non-draft task", func(t *testing.T, database *sql.DB) {
+			insertV1Task(t, database, "pending", "MANUAL", "PENDING", "1.00")
+		}},
+		{"non-manual task", func(t *testing.T, database *sql.DB) { insertV1Task(t, database, "excel", "EXCEL", "DRAFT", "1.00") }},
+		{"invalid v2 money", func(t *testing.T, database *sql.DB) { insertV1Task(t, database, "zero", "MANUAL", "DRAFT", "0.00") }},
+		{"third decimal place", func(t *testing.T, database *sql.DB) {
+			insertV1Task(t, database, "third-decimal", "MANUAL", "DRAFT", "1.234")
+		}},
+		{"spec trial", func(t *testing.T, database *sql.DB) {
+			insertV1Task(t, database, "task", "MANUAL", "DRAFT", "1.00")
+			insertV1SpecTrial(t, database, "trial", "task")
+		}},
+		{"authorization", func(t *testing.T, database *sql.DB) {
+			insertV1Task(t, database, "task", "MANUAL", "DRAFT", "1.00")
+			insertV1SpecTrial(t, database, "trial", "task")
+			insertV1Authorization(t, database, "auth", "task", "trial")
+		}},
+		{"submission", func(t *testing.T, database *sql.DB) {
+			insertV1Task(t, database, "task", "MANUAL", "DRAFT", "1.00")
+			insertV1SpecTrial(t, database, "trial", "task")
+			insertV1Authorization(t, database, "auth", "task", "trial")
+			if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, command_id, dry_run_id, status, verified_unit_price, quantity_read, confirm_page_amount, created_at) VALUES ('submission', 'task', 'auth', 'command', 'dry-run', 'FENCED', '1.00', 1, '1.00', ? )`, migrationTime); err != nil {
+				t.Fatalf("insert v1 submission: %v", err)
+			}
+		}},
+	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			database := openTestDatabase(t)
+			migrateToV1(t, database)
+			test.setup(t, database)
+			before := v1RowCount(t, database)
+			if err := migrations.Up(context.Background(), database, migrationDirectory(t)); err == nil {
+				t.Fatal("unsafe legacy data upgraded successfully")
+			}
+			assertVersion(t, database, 1)
+			assertTableExists(t, database, "spec_trials", true)
+			assertTableExists(t, database, "purchase_attempts", false)
+			assertTableExists(t, database, "single_pass_upgrade_guard", false)
+			if after := v1RowCount(t, database); after != before {
+				t.Fatalf("v1 data changed after rejection: before=%d after=%d", before, after)
+			}
+		})
+	}
+}
+
+func TestV2SchemaConstraintsAndRelationships(t *testing.T) {
 	database := openTestDatabase(t)
 	if err := migrations.Up(context.Background(), database, migrationDirectory(t)); err != nil {
 		t.Fatalf("apply migrations: %v", err)
 	}
-
-	for _, column := range []struct {
-		table string
-		name  string
-	}{
+	for _, column := range []struct{ table, name string }{
 		{"tasks", "max_total_price"},
-		{"spec_trials", "unit_price"},
-		{"spec_trials", "total_price"},
-		{"order_authorizations", "authorized_unit_price"},
 		{"order_authorizations", "total_price_cap"},
-		{"order_submissions", "verified_unit_price"},
-		{"order_submissions", "confirm_page_amount"},
+		{"purchase_attempts", "gate1_unit_price"},
+		{"purchase_attempts", "gate2_unit_price"},
+		{"purchase_attempts", "confirm_amount"},
+		{"order_submissions", "gate1_unit_price"},
+		{"order_submissions", "gate2_unit_price"},
+		{"order_submissions", "confirm_amount"},
 	} {
 		assertColumnType(t, database, column.table, column.name, "TEXT")
 	}
-
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES ('bad-quantity', 'MANUAL', 'title', 'goods', 'white', 'XL', 0, '80.00', 'DRAFT', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert task with quantity 0 succeeded")
+	for _, legacy := range []string{"spec_trials", "authorized_unit_price", "spec_trial_id", "command_id", "dry_run_id"} {
+		var count int
+		if err := database.QueryRow(`SELECT COUNT(*) FROM sqlite_master WHERE sql LIKE '%' || ? || '%'`, legacy).Scan(&count); err != nil {
+			t.Fatalf("search schema for %s: %v", legacy, err)
+		}
+		if count != 0 {
+			t.Fatalf("legacy identifier %q remains in v2 schema", legacy)
+		}
 	}
 
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES ('bad-price', 'MANUAL', 'title', 'goods', 'white', 'XL', 1, '80..00', 'DRAFT', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert task with malformed decimal price succeeded")
+	insertV2Task(t, database, "task-one", "MANUAL", "DRAFT")
+	insertV2Task(t, database, "task-two", "MANUAL", "DRAFT")
+	for index, value := range []string{"", "0", "0.00", "-1.00", "1e2", "1.", "1.234", " 1.00", "one"} {
+		if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, created_at, updated_at) VALUES (?, 'MANUAL', 'title', 'goods', 'white', 'XL', 1, ?, 'DRAFT', ?, ?)`, "bad-price-"+strconv.Itoa(index), value, migrationTime, migrationTime); err == nil {
+			t.Fatalf("invalid total price %q succeeded", value)
 		}
+	}
+	if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, created_at, updated_at) VALUES ('bad-status', 'MANUAL', 'title', 'goods', 'white', 'XL', 1, '1.00', 'UNKNOWN', ?, ?)`, migrationTime, migrationTime); err == nil {
+		t.Fatal("unknown task status succeeded")
+	}
+	insertV2Authorization(t, database, "auth-one", "task-one", 1, "start-one")
+	insertV2Authorization(t, database, "auth-two", "task-two", 1, "start-two")
+	if _, err := database.Exec(`INSERT INTO order_authorizations (id, task_id, task_version, start_key, goods_id, sku_color, sku_size, quantity, total_price_cap, status, created_by, created_at, expires_at) VALUES ('bad-auth-price', 'task-one', 2, 'bad-price', 'goods', 'white', 'XL', 1, '1.234', 'ACTIVE', 'admin', ?, ?)`, migrationTime, migrationTime); err == nil {
+		t.Fatal("third decimal authorization cap succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO order_authorizations (id, task_id, task_version, start_key, goods_id, sku_color, sku_size, quantity, total_price_cap, status, created_by, created_at, expires_at) VALUES ('bad-auth-status', 'task-one', 2, 'bad-status', 'goods', 'white', 'XL', 1, '1.00', 'UNKNOWN', 'admin', ?, ?)`, migrationTime, migrationTime); err == nil {
+		t.Fatal("unknown authorization status succeeded")
+	}
+	insertV2Authorization(t, database, "auth-one-b", "task-one", 2, "start-one-b")
+	if _, err := database.Exec(`INSERT INTO order_authorizations (id, task_id, task_version, start_key, goods_id, sku_color, sku_size, quantity, total_price_cap, status, created_by, created_at, expires_at) VALUES ('duplicate-version', 'task-one', 1, 'different-start', 'goods', 'white', 'XL', 1, '1.00', 'ACTIVE', 'admin', ?, ?)`, migrationTime, migrationTime); err == nil {
+		t.Fatal("duplicate task version authorization succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO purchase_attempts (id, task_id, authorization_id, claim_generation, status, started_at) VALUES ('cross-attempt', 'task-one', 'auth-two', 1, 'CLAIMED', ?)`, migrationTime); err == nil {
+		t.Fatal("attempt using another task authorization succeeded")
+	}
+	insertV2Attempt(t, database, "attempt-one", "task-one", "auth-one", 1)
+	if _, err := database.Exec(`INSERT INTO purchase_attempts (id, task_id, authorization_id, claim_generation, status, gate1_unit_price, started_at) VALUES ('bad-attempt-price', 'task-one', 'auth-one', 2, 'ORDERING', '1.234', ?)`, migrationTime); err == nil {
+		t.Fatal("third decimal gate price succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO purchase_attempts (id, task_id, authorization_id, claim_generation, status, started_at) VALUES ('bad-attempt-status', 'task-one', 'auth-one', 2, 'UNKNOWN', ?)`, migrationTime); err == nil {
+		t.Fatal("unknown attempt status succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO purchase_attempts (id, task_id, authorization_id, claim_generation, status, failure_code, started_at) VALUES ('bad-code', 'task-one', 'auth-one', 2, 'FAILED', 'FREE_TEXT', ?)`, migrationTime); err == nil {
+		t.Fatal("unknown failure code succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES ('cross-submission', 'task-one', 'auth-two', 'attempt-one', 'FENCED', '1.00', '1.00', 1, '1.00', ?)`, migrationTime); err == nil {
+		t.Fatal("submission using another task authorization succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES ('cross-authorization-submission', 'task-one', 'auth-one-b', 'attempt-one', 'FENCED', '1.00', '1.00', 1, '1.00', ?)`, migrationTime); err == nil {
+		t.Fatal("submission combining another same-task authorization and attempt succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES ('bad-submission-status', 'task-one', 'auth-one', 'attempt-one', 'UNKNOWN', '1.00', '1.00', 1, '1.00', ?)`, migrationTime); err == nil {
+		t.Fatal("unknown submission status succeeded")
+	}
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES ('bad-submission-price', 'task-one', 'auth-one', 'attempt-one', 'FENCED', '1.234', '1.00', 1, '1.00', ?)`, migrationTime); err == nil {
+		t.Fatal("third decimal submission price succeeded")
+	}
+	insertV2Submission(t, database, "submission-one", "task-one", "auth-one", "attempt-one")
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES ('duplicate-auth', 'task-one', 'auth-one', 'attempt-one', 'FENCED', '1.00', '1.00', 1, '1.00', ?)`, migrationTime); err == nil {
+		t.Fatal("second submission for fenced authorization succeeded")
+	}
+}
 
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES ('fractional-quantity', 'MANUAL', 'title', 'goods', 'white', 'XL', 1.5, '80.00', 'DRAFT', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert task with fractional quantity succeeded")
+func TestDowngradeRejectsV2BusinessDataAtomically(t *testing.T) {
+	tests := []struct {
+		name  string
+		setup func(*testing.T, *sql.DB)
+	}{
+		{"authorization", func(t *testing.T, database *sql.DB) {
+			insertV2Task(t, database, "task", "MANUAL", "DRAFT")
+			insertV2Authorization(t, database, "auth", "task", 1, "start")
+		}},
+		{"attempt", func(t *testing.T, database *sql.DB) {
+			insertV2Task(t, database, "task", "MANUAL", "DRAFT")
+			insertV2Authorization(t, database, "auth", "task", 1, "start")
+			insertV2Attempt(t, database, "attempt", "task", "auth", 1)
+		}},
+		{"submission", func(t *testing.T, database *sql.DB) {
+			insertV2Task(t, database, "task", "MANUAL", "DRAFT")
+			insertV2Authorization(t, database, "auth", "task", 1, "start")
+			insertV2Attempt(t, database, "attempt", "task", "auth", 1)
+			insertV2Submission(t, database, "submission", "task", "auth", "attempt")
+		}},
+		{"non-draft task", func(t *testing.T, database *sql.DB) { insertV2Task(t, database, "pending", "MANUAL", "PENDING") }},
+		{"non-manual task", func(t *testing.T, database *sql.DB) { insertV2Task(t, database, "excel", "EXCEL", "DRAFT") }},
 	}
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			database := openTestDatabase(t)
+			if err := migrations.Up(context.Background(), database, migrationDirectory(t)); err != nil {
+				t.Fatalf("apply migrations: %v", err)
+			}
+			test.setup(t, database)
+			before := v2RowCount(t, database)
+			if err := migrations.Down(context.Background(), database, migrationDirectory(t)); err == nil {
+				t.Fatal("unsafe v2 data downgraded successfully")
+			}
+			assertVersion(t, database, 2)
+			assertTableExists(t, database, "purchase_attempts", true)
+			assertTableExists(t, database, "spec_trials", false)
+			assertTableExists(t, database, "single_pass_downgrade_guard", false)
+			if after := v2RowCount(t, database); after != before {
+				t.Fatalf("v2 data changed after rejected downgrade: before=%d after=%d", before, after)
+			}
+		})
+	}
+}
 
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES ('trailing-decimal', 'MANUAL', 'title', 'goods', 'white', 'XL', 1, '80.', 'DRAFT', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert task with trailing decimal point succeeded")
+func migrateToV1(t *testing.T, database *sql.DB) {
+	t.Helper()
+	if err := migrations.Run(context.Background(), database, migrationDirectory(t), "up-by-one"); err != nil {
+		t.Fatalf("apply v1: %v", err)
 	}
+	assertVersion(t, database, 1)
+}
 
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES ('bad-status', 'MANUAL', 'title', 'goods', 'white', 'XL', 1, '80.00', 'UNKNOWN', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert task with invalid status succeeded")
+func insertV1Task(t *testing.T, database *sql.DB, id, source, status, price string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, created_at, updated_at) VALUES (?, ?, 'title', 'goods', 'white', 'XL', 1, ?, ?, ?, ?)`, id, source, price, status, migrationTime, migrationTime); err != nil {
+		t.Fatalf("insert v1 task: %v", err)
 	}
+}
 
-	insertTask(t, database, "task-one")
-	insertTask(t, database, "task-two")
-	if _, err := database.Exec(`
-		INSERT INTO spec_trials (
-			id, task_id, attempt, product_title, selected_color, selected_size, unit_price,
-			total_price, evidence_sha256, created_at
-		) VALUES ('orphan-trial', 'missing-task', 1, 'title', 'white', 'XL', '32.50', '65.00', 'hash', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert spec trial without task succeeded")
+func insertV1SpecTrial(t *testing.T, database *sql.DB, id, taskID string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO spec_trials (id, task_id, attempt, product_title, selected_color, selected_size, unit_price, total_price, evidence_sha256, created_at) VALUES (?, ?, 1, 'title', 'white', 'XL', '1.00', '1.00', 'hash', ?)`, id, taskID, migrationTime); err != nil {
+		t.Fatalf("insert v1 spec trial: %v", err)
 	}
+}
 
-	insertSpecTrial(t, database, "trial-one", "task-one")
-	insertSpecTrial(t, database, "trial-two", "task-two")
-	if _, err := database.Exec(`
-		INSERT INTO order_authorizations (
-			id, task_id, spec_trial_id, version, goods_id, sku_color, sku_size, quantity,
-			authorized_unit_price, total_price_cap, status, created_by, created_at, expires_at
-		) VALUES ('authorization-cross-task', 'task-one', 'trial-two', 1, 'goods', 'white', 'XL', 2, '32.50', '80.00', 'PENDING_DELIVERY', 'admin-one', '2026-08-03T00:00:00Z', '2026-08-03T01:00:00Z')
-	`); err == nil {
-		t.Fatal("insert authorization with a spec trial from another task succeeded")
+func insertV1Authorization(t *testing.T, database *sql.DB, id, taskID, trialID string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO order_authorizations (id, task_id, spec_trial_id, version, goods_id, sku_color, sku_size, quantity, authorized_unit_price, total_price_cap, status, created_by, created_at, expires_at) VALUES (?, ?, ?, 1, 'goods', 'white', 'XL', 1, '1.00', '1.00', 'PENDING_DELIVERY', 'admin', ?, ?)`, id, taskID, trialID, migrationTime, migrationTime); err != nil {
+		t.Fatalf("insert v1 authorization: %v", err)
 	}
+}
 
-	insertAuthorization(t, database, "authorization-one", "task-one", "trial-one", 1)
-	insertAuthorization(t, database, "authorization-task-two", "task-two", "trial-two", 1)
-	if _, err := database.Exec(`
-		INSERT INTO order_submissions (
-			id, task_id, authorization_id, command_id, dry_run_id, status, verified_unit_price,
-			quantity_read, confirm_page_amount, created_at
-		) VALUES ('submission-cross-task', 'task-one', 'authorization-task-two', 'command-cross-task', 'dry-run-cross-task', 'FENCED', '32.50', 2, '65.00', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert submission with an authorization from another task succeeded")
+func insertV2Task(t *testing.T, database *sql.DB, id, source, status string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, created_at, updated_at) VALUES (?, ?, 'title', 'goods', 'white', 'XL', 1, '1.00', ?, ?, ?)`, id, source, status, migrationTime, migrationTime); err != nil {
+		t.Fatalf("insert v2 task: %v", err)
 	}
+}
 
-	if _, err := database.Exec(`
-		INSERT INTO order_authorizations (
-			id, task_id, spec_trial_id, version, goods_id, sku_color, sku_size, quantity,
-			authorized_unit_price, total_price_cap, status, created_by, created_at, expires_at
-		) VALUES ('authorization-duplicate', 'task-one', 'trial-one', 1, 'goods', 'white', 'XL', 2, '32.50', '80.00', 'PENDING_DELIVERY', 'admin-one', '2026-08-03T00:00:00Z', '2026-08-03T01:00:00Z')
-	`); err == nil {
-		t.Fatal("insert authorization with duplicate task version succeeded")
+func insertV2Authorization(t *testing.T, database *sql.DB, id, taskID string, version int, startKey string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO order_authorizations (id, task_id, task_version, start_key, goods_id, sku_color, sku_size, quantity, total_price_cap, status, created_by, created_at, expires_at) VALUES (?, ?, ?, ?, 'goods', 'white', 'XL', 1, '1.00', 'ACTIVE', 'admin', ?, ?)`, id, taskID, version, startKey, migrationTime, migrationTime); err != nil {
+		t.Fatalf("insert v2 authorization: %v", err)
 	}
+}
 
-	insertSubmission(t, database, "submission-one", "authorization-one", "command-one")
-	if _, err := database.Exec(`
-		INSERT INTO order_submissions (
-			id, task_id, authorization_id, command_id, dry_run_id, status, verified_unit_price,
-			quantity_read, confirm_page_amount, created_at
-		) VALUES ('submission-duplicate-auth', 'task-one', 'authorization-one', 'command-two', 'dry-run-two', 'FENCED', '32.50', 2, '65.00', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert submission with duplicate authorization succeeded")
+func insertV2Attempt(t *testing.T, database *sql.DB, id, taskID, authorizationID string, generation int) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO purchase_attempts (id, task_id, authorization_id, claim_generation, status, started_at) VALUES (?, ?, ?, ?, 'CLAIMED', ?)`, id, taskID, authorizationID, generation, migrationTime); err != nil {
+		t.Fatalf("insert v2 attempt: %v", err)
 	}
+}
 
-	insertAuthorization(t, database, "authorization-two", "task-one", "trial-one", 2)
-	if _, err := database.Exec(`
-		INSERT INTO order_submissions (
-			id, task_id, authorization_id, command_id, dry_run_id, status, verified_unit_price,
-			quantity_read, confirm_page_amount, created_at
-		) VALUES ('submission-duplicate-command', 'task-one', 'authorization-two', 'command-one', 'dry-run-three', 'FENCED', '32.50', 2, '65.00', '2026-08-03T00:00:00Z')
-	`); err == nil {
-		t.Fatal("insert submission with duplicate command succeeded")
+func insertV2Submission(t *testing.T, database *sql.DB, id, taskID, authorizationID, attemptID string) {
+	t.Helper()
+	if _, err := database.Exec(`INSERT INTO order_submissions (id, task_id, authorization_id, attempt_id, status, gate1_unit_price, gate2_unit_price, quantity_read, confirm_amount, created_at) VALUES (?, ?, ?, ?, 'FENCED', '1.00', '1.00', 1, '1.00', ?)`, id, taskID, authorizationID, attemptID, migrationTime); err != nil {
+		t.Fatalf("insert v2 submission: %v", err)
 	}
 }
 
+func v1RowCount(t *testing.T, database *sql.DB) int {
+	t.Helper()
+	var count int
+	if err := database.QueryRow(`SELECT (SELECT COUNT(*) FROM tasks) + (SELECT COUNT(*) FROM spec_trials) + (SELECT COUNT(*) FROM order_authorizations) + (SELECT COUNT(*) FROM order_submissions)`).Scan(&count); err != nil {
+		t.Fatalf("count v1 rows: %v", err)
+	}
+	return count
+}
+
+func v2RowCount(t *testing.T, database *sql.DB) int {
+	t.Helper()
+	var count int
+	if err := database.QueryRow(`SELECT (SELECT COUNT(*) FROM tasks) + (SELECT COUNT(*) FROM order_authorizations) + (SELECT COUNT(*) FROM purchase_attempts) + (SELECT COUNT(*) FROM order_submissions)`).Scan(&count); err != nil {
+		t.Fatalf("count v2 rows: %v", err)
+	}
+	return count
+}
+
 func openTestDatabase(t *testing.T) *sql.DB {
 	t.Helper()
 	database, err := sqlite.Open(filepath.Join(t.TempDir(), "migrations.db"))
 	if err != nil {
 		t.Fatalf("open test database: %v", err)
 	}
-	t.Cleanup(func() {
-		if err := database.Close(); err != nil {
-			t.Errorf("close test database: %v", err)
-		}
-	})
-
+	t.Cleanup(func() { _ = database.Close() })
 	return database
 }
 
@@ -197,7 +354,6 @@ func migrationDirectory(t *testing.T) string {
 	if !ok {
 		t.Fatal("locate migration test source")
 	}
-
 	return filepath.Join(filepath.Dir(file), "..", "..", "migrations")
 }
 
@@ -234,50 +390,12 @@ func assertColumnType(t *testing.T, database *sql.DB, table, column, want string
 	}
 }
 
-func insertTask(t *testing.T, database *sql.DB, id string) {
-	t.Helper()
-	if _, err := database.Exec(`
-		INSERT INTO tasks (
-			id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price,
-			status, created_at, updated_at
-		) VALUES (?, 'MANUAL', 'title', 'goods', 'white', 'XL', 2, '80.00', 'DRAFT', '2026-08-03T00:00:00Z', '2026-08-03T00:00:00Z')
-	`, id); err != nil {
-		t.Fatalf("insert task: %v", err)
+func TestV2MigrationSQLDoesNotDisableForeignKeys(t *testing.T) {
+	contents, err := os.ReadFile(filepath.Join(migrationDirectory(t), "00002_single_pass_model.sql"))
+	if err != nil {
+		t.Fatalf("read migration: %v", err)
 	}
-}
-
-func insertSpecTrial(t *testing.T, database *sql.DB, id, taskID string) {
-	t.Helper()
-	if _, err := database.Exec(`
-		INSERT INTO spec_trials (
-			id, task_id, attempt, product_title, selected_color, selected_size, unit_price,
-			total_price, evidence_sha256, created_at
-		) VALUES (?, ?, 1, 'title', 'white', 'XL', '32.50', '65.00', 'hash', '2026-08-03T00:00:00Z')
-	`, id, taskID); err != nil {
-		t.Fatalf("insert spec trial: %v", err)
-	}
-}
-
-func insertAuthorization(t *testing.T, database *sql.DB, id, taskID, specTrialID string, version int) {
-	t.Helper()
-	if _, err := database.Exec(`
-		INSERT INTO order_authorizations (
-			id, task_id, spec_trial_id, version, goods_id, sku_color, sku_size, quantity,
-			authorized_unit_price, total_price_cap, status, created_by, created_at, expires_at
-		) VALUES (?, ?, ?, ?, 'goods', 'white', 'XL', 2, '32.50', '80.00', 'PENDING_DELIVERY', 'admin-one', '2026-08-03T00:00:00Z', '2026-08-03T01:00:00Z')
-	`, id, taskID, specTrialID, version); err != nil {
-		t.Fatalf("insert authorization: %v", err)
-	}
-}
-
-func insertSubmission(t *testing.T, database *sql.DB, id, authorizationID, commandID string) {
-	t.Helper()
-	if _, err := database.Exec(`
-		INSERT INTO order_submissions (
-			id, task_id, authorization_id, command_id, dry_run_id, status, verified_unit_price,
-			quantity_read, confirm_page_amount, created_at
-		) VALUES (?, 'task-one', ?, ?, 'dry-run-one', 'FENCED', '32.50', 2, '65.00', '2026-08-03T00:00:00Z')
-	`, id, authorizationID, commandID); err != nil {
-		t.Fatalf("insert submission: %v", err)
+	if strings.Contains(strings.ToUpper(string(contents)), "PRAGMA FOREIGN_KEYS = OFF") {
+		t.Fatal("migration disables foreign keys")
 	}
 }

admin/internal/server/router.go

@@ -9,6 +9,7 @@ import (
 	"strings"
 
 	"cmbuyer/admin/internal/auth"
+	"cmbuyer/admin/internal/tasks"
 	"cmbuyer/admin/internal/transport/webui"
 
 	"github.com/gin-gonic/gin"
@@ -22,11 +23,12 @@ type Options struct {
 	AdminUsername       string
 	AdminPasswordBcrypt string
 	Sessions            *auth.Manager
+	Tasks               tasks.Store
 }
 
 // NewRouter 返回当前服务范围内的完整 HTTP 路由。
 func NewRouter(options Options) (*gin.Engine, error) {
-	if options.AdminUsername == "" || options.AdminPasswordBcrypt == "" || options.Sessions == nil {
+	if options.AdminUsername == "" || options.AdminPasswordBcrypt == "" || options.Sessions == nil || options.Tasks == nil {
 		return nil, errors.New("server authentication options are incomplete")
 	}
 
@@ -38,6 +40,8 @@ func NewRouter(options Options) (*gin.Engine, error) {
 	router.POST("/login", login(options))
 	router.POST("/logout", logout(options))
 	router.GET("/tasks", tasksPage(options))
+	router.GET("/tasks/new", newTaskPage(options))
+	router.POST("/tasks", createTask(options))
 
 	return router, nil
 }
@@ -70,11 +74,14 @@ func loginPage(options Options) gin.HandlerFunc {
 
 func login(options Options) gin.HandlerFunc {
 	return func(context *gin.Context) {
-		limitFormBody(context)
-		csrfToken := context.PostForm("csrf_token")
-		returnPath := returnTo(context.PostForm("return_to"))
-		username := context.PostForm("username")
-		password := context.PostForm("password")
+		if !parseForm(context) {
+			return
+		}
+		form := context.Request.PostForm
+		csrfToken := form.Get("csrf_token")
+		returnPath := returnTo(form.Get("return_to"))
+		username := form.Get("username")
+		password := form.Get("password")
 
 		if _, ok := options.Sessions.VerifyCSRF(context.Request, csrfToken); !ok {
 			newCSRF, _ := options.Sessions.Ensure(context.Writer, context.Request)
@@ -97,8 +104,10 @@ func login(options Options) gin.HandlerFunc {
 
 func logout(options Options) gin.HandlerFunc {
 	return func(context *gin.Context) {
-		limitFormBody(context)
-		authenticated, ok := options.Sessions.VerifyCSRF(context.Request, context.PostForm("csrf_token"))
+		if !parseForm(context) {
+			return
+		}
+		authenticated, ok := options.Sessions.VerifyCSRF(context.Request, context.Request.PostForm.Get("csrf_token"))
 		if !ok || !authenticated {
 			context.Status(http.StatusForbidden)
 			return
@@ -117,10 +126,111 @@ func tasksPage(options Options) gin.HandlerFunc {
 			return
 		}
 
-		context.Header("Content-Type", "text/html; charset=utf-8")
-		if err := webui.RenderTasks(context.Writer, webui.TasksData{CSRFToken: csrfToken}); err != nil {
-			_ = context.Error(err)
+		drafts, err := options.Tasks.ListDrafts(context.Request.Context())
+		if err != nil {
+			context.Status(http.StatusInternalServerError)
+			return
 		}
+		data := webui.TasksData{CSRFToken: csrfToken, Drafts: drafts}
+		for _, draft := range drafts {
+			if draft.ID == context.Query("created") {
+				data.Success = true
+				break
+			}
+		}
+		if context.Query("create") == "1" {
+			form, err := newTaskForm()
+			if err != nil {
+				context.Status(http.StatusInternalServerError)
+				return
+			}
+			data.OpenForm = true
+			data.Form = form
+			data.FocusField = "title"
+		}
+		renderTasks(context, http.StatusOK, data)
+	}
+}
+
+func newTaskPage(options Options) gin.HandlerFunc {
+	return func(context *gin.Context) {
+		csrf, authenticated := options.Sessions.Ensure(context.Writer, context.Request)
+		if !authenticated {
+			context.Redirect(http.StatusSeeOther, "/login?return_to=%2Ftasks%2Fnew")
+			return
+		}
+		form, err := newTaskForm()
+		if err != nil {
+			context.Status(http.StatusInternalServerError)
+			return
+		}
+		renderTasks(context, http.StatusOK, webui.TasksData{CSRFToken: csrf, Form: form, FullPage: true, FocusField: "title"})
+	}
+}
+func createTask(options Options) gin.HandlerFunc {
+	return func(context *gin.Context) {
+		if !parseForm(context) {
+			return
+		}
+		requestForm := context.Request.PostForm
+		authenticated, csrfOK := options.Sessions.VerifyCSRF(context.Request, requestForm.Get("csrf_token"))
+		if !csrfOK || !authenticated {
+			context.Status(http.StatusForbidden)
+			return
+		}
+		form := taskForm(requestForm)
+		draft, validation := tasks.Validate(form)
+		if draft.GoodsID != "" {
+			form.ProductURL = tasks.CanonicalURL(draft.GoodsID)
+		}
+		fullPage := requestForm.Get("form_mode") == "full"
+		if !validation.Valid() {
+			drafts, err := options.Tasks.ListDrafts(context.Request.Context())
+			if err != nil {
+				context.Status(http.StatusInternalServerError)
+				return
+			}
+			renderTasks(context, http.StatusBadRequest, webui.TasksData{CSRFToken: csrfFor(context, options), Drafts: drafts, Form: form, Errors: validation, OpenForm: !fullPage, FullPage: fullPage, FocusField: firstError(validation)})
+			return
+		}
+		created, err := options.Tasks.CreateDraft(context.Request.Context(), draft)
+		if err != nil {
+			if errors.Is(err, tasks.ErrCreateKeyConflict) {
+				validation["create_key"] = "该创建请求已用于另一条任务，请重新打开表单。"
+				drafts, listErr := options.Tasks.ListDrafts(context.Request.Context())
+				if listErr != nil {
+					context.Status(http.StatusInternalServerError)
+					return
+				}
+				renderTasks(context, http.StatusConflict, webui.TasksData{CSRFToken: csrfFor(context, options), Drafts: drafts, Form: form, Errors: validation, OpenForm: !fullPage, FullPage: fullPage, FocusField: firstError(validation)})
+				return
+			}
+			context.Status(http.StatusInternalServerError)
+			return
+		}
+		context.Redirect(http.StatusSeeOther, "/tasks?created="+url.QueryEscape(created.ID))
+	}
+}
+
+func newTaskForm() (tasks.Form, error) {
+	key, err := tasks.NewCreateKey()
+	if err != nil {
+		return tasks.Form{}, err
+	}
+	return tasks.Form{CreateKey: key}, nil
+}
+func taskForm(form url.Values) tasks.Form {
+	return tasks.Form{CreateKey: form.Get("create_key"), Title: form.Get("title"), ProductURL: form.Get("product_url"), SKUColor: form.Get("sku_color"), SKUSize: form.Get("sku_size"), Quantity: form.Get("quantity"), MaxTotalPrice: form.Get("max_total_price")}
+}
+func csrfFor(context *gin.Context, options Options) string {
+	csrf, _ := options.Sessions.Ensure(context.Writer, context.Request)
+	return csrf
+}
+func renderTasks(context *gin.Context, status int, data webui.TasksData) {
+	context.Header("Content-Type", "text/html; charset=utf-8")
+	context.Status(status)
+	if err := webui.RenderTasks(context.Writer, data); err != nil {
+		_ = context.Error(err)
 	}
 }
 
@@ -137,8 +247,27 @@ func renderLogin(context *gin.Context, status int, csrfToken, returnPath, userna
 	}
 }
 
-func limitFormBody(context *gin.Context) {
+func parseForm(context *gin.Context) bool {
 	context.Request.Body = http.MaxBytesReader(context.Writer, context.Request.Body, maxFormBytes)
+	if err := context.Request.ParseForm(); err != nil {
+		var tooLarge *http.MaxBytesError
+		if errors.As(err, &tooLarge) {
+			context.Status(http.StatusRequestEntityTooLarge)
+		} else {
+			context.Status(http.StatusBadRequest)
+		}
+		return false
+	}
+	return true
+}
+
+func firstError(validation tasks.Errors) string {
+	for _, field := range []string{"title", "product_url", "sku_color", "sku_size", "quantity", "max_total_price"} {
+		if _, ok := validation[field]; ok {
+			return field
+		}
+	}
+	return "title"
 }
 
 func returnTo(value string) string {

admin/internal/server/router_test.go

@@ -1,6 +1,7 @@
 package server_test
 
 import (
+	"context"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -10,12 +11,14 @@ import (
 
 	"cmbuyer/admin/internal/auth"
 	"cmbuyer/admin/internal/server"
+	"cmbuyer/admin/internal/tasks"
 
 	"github.com/gin-gonic/gin"
 	"golang.org/x/crypto/bcrypt"
 )
 
 var csrfPattern = regexp.MustCompile(`name="csrf_token" value="([^"]+)"`)
+var createKeyPattern = regexp.MustCompile(`name="create_key" value="([^"]+)"`)
 
 func TestHealthzIsPublic(t *testing.T) {
 	router, _ := newRouter(t)
@@ -175,6 +178,149 @@ func TestTamperedCookieCannotAccessTasks(t *testing.T) {
 
 }
 
+func TestTaskCreationRendersSharedFormsAndPersistsOnlyDraft(t *testing.T) {
+	router, _ := newRouter(t)
+	cookie := authenticate(t, router)
+
+	modal := serve(router, http.MethodGet, "/tasks?create=1", nil, cookie)
+	if modal.Code != http.StatusOK {
+		t.Fatalf("GET dialog form status = %d, want 200", modal.Code)
+	}
+	fullPage := serve(router, http.MethodGet, "/tasks/new", nil, cookie)
+	if fullPage.Code != http.StatusOK {
+		t.Fatalf("GET full form status = %d, want 200", fullPage.Code)
+	}
+	for _, want := range []string{`<div class="modal-scrim"`, `<dialog open`, `aria-modal="true"`, `name="title"`, `name="product_url"`, `name="sku_color"`, `name="sku_size"`, `name="quantity"`, `name="max_total_price"`, `type="url" inputmode="url" maxlength="2048"`, `type="number" inputmode="numeric" min="1" step="1"`, `inputmode="decimal" pattern="[0-9]+(\.[0-9]{1,2})?"`, `maxlength="120"`, `maxlength="80"`, `required`, `autofocus`, `导入</button><a class="button primary"`, `type="search" disabled`, `disabled>筛选</button>`, `disabled>清除</button>`, `min-height:44px`, `overflow-x:auto`, `prefers-reduced-motion`} {
+		if !strings.Contains(modal.Body.String(), want) {
+			t.Fatalf("dialog form is missing %q", want)
+		}
+	}
+	for _, want := range []string{`name="title"`, `name="product_url"`, `name="sku_color"`, `name="sku_size"`, `name="quantity"`, `name="max_total_price"`, `name="form_mode" value="full"`} {
+		if !strings.Contains(fullPage.Body.String(), want) {
+			t.Fatalf("full-page form is missing %q", want)
+		}
+	}
+
+	invalid := serve(router, http.MethodPost, "/tasks", url.Values{
+		"csrf_token":      {csrfToken(t, modal.Body.String())},
+		"create_key":      {createKey(t, modal.Body.String())},
+		"title":           {`<script>alert(1)</script>`},
+		"product_url":     {"https://mobile.yangkeduo.com/goods.html?goods_id=937122477375&uin=discard"},
+		"sku_color":       {"black"},
+		"sku_size":        {"M"},
+		"quantity":        {"0"},
+		"max_total_price": {"12.80"},
+		"form_mode":       {"dialog"},
+	}, cookie)
+	if invalid.Code != http.StatusBadRequest || !strings.Contains(invalid.Body.String(), `<dialog open`) || !strings.Contains(invalid.Body.String(), "数量必须是正整数") || !strings.Contains(invalid.Body.String(), `role="alert"`) || !strings.Contains(invalid.Body.String(), `href="#quantity"`) || !strings.Contains(invalid.Body.String(), `aria-describedby="quantity-error"`) || !strings.Contains(invalid.Body.String(), `autofocus`) {
+		t.Fatalf("invalid create = (%d, %q), want dialog validation response", invalid.Code, invalid.Body.String())
+	}
+	if strings.Contains(invalid.Body.String(), `<script>alert(1)</script>`) || !strings.Contains(invalid.Body.String(), `&lt;script&gt;alert(1)&lt;/script&gt;`) {
+		t.Fatalf("invalid create did not safely preserve title: %q", invalid.Body.String())
+	}
+	if strings.Contains(invalid.Body.String(), "uin=discard") || !strings.Contains(invalid.Body.String(), `value="https://mobile.yangkeduo.com/goods.html?goods_id=937122477375"`) {
+		t.Fatalf("invalid create did not canonicalize product URL: %q", invalid.Body.String())
+	}
+
+	createPage := serve(router, http.MethodGet, "/tasks?create=1", nil, cookie)
+	key := createKey(t, createPage.Body.String())
+	created := serve(router, http.MethodPost, "/tasks", url.Values{
+		"csrf_token":      {csrfToken(t, createPage.Body.String())},
+		"create_key":      {key},
+		"title":           {"<b>夏季上衣</b>"},
+		"product_url":     {"https://mobile.yangkeduo.com/goods.html?goods_id=937122477375&utm_source=discard"},
+		"sku_color":       {"black"},
+		"sku_size":        {"M"},
+		"quantity":        {"2"},
+		"max_total_price": {"12.8"},
+		"form_mode":       {"dialog"},
+	}, cookie)
+	if created.Code != http.StatusSeeOther || !strings.HasPrefix(created.Header().Get("Location"), "/tasks?created=") {
+		t.Fatalf("valid create = (%d, %q), want 303 to a created-task acknowledgement", created.Code, created.Header().Get("Location"))
+	}
+	replay := serve(router, http.MethodPost, "/tasks", url.Values{
+		"csrf_token":      {csrfToken(t, createPage.Body.String())},
+		"create_key":      {key},
+		"title":           {"<b>夏季上衣</b>"},
+		"product_url":     {"https://mobile.yangkeduo.com/goods.html?goods_id=937122477375&utm_source=discard"},
+		"sku_color":       {"black"},
+		"sku_size":        {"M"},
+		"quantity":        {"2"},
+		"max_total_price": {"12.8"},
+		"form_mode":       {"dialog"},
+	}, cookie)
+	if replay.Code != http.StatusSeeOther {
+		t.Fatalf("idempotent replay status = %d, want 303", replay.Code)
+	}
+	conflict := serve(router, http.MethodPost, "/tasks", url.Values{
+		"csrf_token":      {csrfToken(t, createPage.Body.String())},
+		"create_key":      {key},
+		"title":           {"different task"},
+		"product_url":     {"https://mobile.yangkeduo.com/goods.html?goods_id=937122477375"},
+		"sku_color":       {"black"},
+		"sku_size":        {"M"},
+		"quantity":        {"2"},
+		"max_total_price": {"12.80"},
+		"form_mode":       {"dialog"},
+	}, cookie)
+	if conflict.Code != http.StatusConflict || !strings.Contains(conflict.Body.String(), "该创建请求已用于另一条任务") {
+		t.Fatalf("conflicting create = (%d, %q), want a 409 form error", conflict.Code, conflict.Body.String())
+	}
+
+	list := serve(router, http.MethodGet, created.Header().Get("Location"), nil, cookie)
+	if list.Code != http.StatusOK {
+		t.Fatalf("GET /tasks status = %d, want 200", list.Code)
+	}
+	body := list.Body.String()
+	for _, want := range []string{`任务已创建，已显示在列表首行。`, `&lt;b&gt;夏季上衣&lt;/b&gt;`, `https://mobile.yangkeduo.com/goods.html?goods_id=937122477375`, `target="_blank"`, `rel="noopener noreferrer"`, `¥12.80`, `待开始`, `选择全部任务`, `选择任务`} {
+		if !strings.Contains(body, want) {
+			t.Fatalf("task list is missing %q", want)
+		}
+	}
+	for _, forbidden := range []string{"utm_source", "试选", "PENDING", "支付", "订单确认", "真机", "提交订单"} {
+		if strings.Contains(body, forbidden) {
+			t.Fatalf("task list exposed deferred scope %q", forbidden)
+		}
+	}
+}
+
+func TestTaskCreationRequiresAuthenticationAndCSRF(t *testing.T) {
+	router, _ := newRouter(t)
+	if response := serve(router, http.MethodPost, "/tasks", url.Values{}, nil); response.Code != http.StatusForbidden {
+		t.Fatalf("anonymous POST /tasks = %d, want 403", response.Code)
+	}
+	cookie := authenticate(t, router)
+	if response := serve(router, http.MethodPost, "/tasks", url.Values{}, cookie); response.Code != http.StatusForbidden {
+		t.Fatalf("POST /tasks without CSRF = %d, want 403", response.Code)
+	}
+}
+
+func TestTaskCreationFailsClosedForMalformedOrOversizedForms(t *testing.T) {
+	router, _ := newRouter(t)
+	cookie := authenticate(t, router)
+	page := serve(router, http.MethodGet, "/tasks?create=1", nil, cookie)
+	base := url.Values{
+		"csrf_token":      {csrfToken(t, page.Body.String())},
+		"create_key":      {createKey(t, page.Body.String())},
+		"title":           {"title"},
+		"product_url":     {"https://mobile.yangkeduo.com/goods.html?goods_id=1;uin=malformed"},
+		"sku_color":       {"black"},
+		"sku_size":        {"M"},
+		"quantity":        {"1"},
+		"max_total_price": {"1.00"},
+		"form_mode":       {"dialog"},
+	}
+	malformed := serve(router, http.MethodPost, "/tasks", base, cookie)
+	if malformed.Code != http.StatusBadRequest || !strings.Contains(malformed.Body.String(), "canonical 商品链接") {
+		t.Fatalf("malformed URL create = (%d, %q), want validation failure", malformed.Code, malformed.Body.String())
+	}
+
+	oversized := url.Values{"csrf_token": {csrfToken(t, page.Body.String())}, "title": {strings.Repeat("x", 9<<10)}}
+	if response := serve(router, http.MethodPost, "/tasks", oversized, cookie); response.Code != http.StatusRequestEntityTooLarge {
+		t.Fatalf("oversized form status = %d, want 413", response.Code)
+	}
+}
+
 func assertSecurityHeaders(t *testing.T, response *httptest.ResponseRecorder) {
 	t.Helper()
 	want := map[string]string{
@@ -246,6 +392,7 @@ func newRouter(t *testing.T) (*gin.Engine, *auth.Manager) {
 		AdminUsername:       "admin",
 		AdminPasswordBcrypt: string(hash),
 		Sessions:            manager,
+		Tasks:               &memoryStore{},
 	})
 	if err != nil {
 		t.Fatalf("NewRouter: %v", err)
@@ -253,6 +400,24 @@ func newRouter(t *testing.T) (*gin.Engine, *auth.Manager) {
 	return router, manager
 }
 
+type memoryStore struct{ drafts []tasks.Draft }
+
+func (store *memoryStore) CreateDraft(_ context.Context, draft tasks.Draft) (tasks.Draft, error) {
+	for _, existing := range store.drafts {
+		if existing.ID == draft.ID {
+			if existing.Title != draft.Title || existing.GoodsID != draft.GoodsID || existing.SKUColor != draft.SKUColor || existing.SKUSize != draft.SKUSize || existing.Quantity != draft.Quantity || existing.MaxTotalPrice != draft.MaxTotalPrice {
+				return tasks.Draft{}, tasks.ErrCreateKeyConflict
+			}
+			return existing, nil
+		}
+	}
+	store.drafts = append(store.drafts, draft)
+	return draft, nil
+}
+func (store *memoryStore) ListDrafts(_ context.Context) ([]tasks.Draft, error) {
+	return append([]tasks.Draft(nil), store.drafts...), nil
+}
+
 func serve(router http.Handler, method, target string, form url.Values, cookie *http.Cookie) *httptest.ResponseRecorder {
 	var body *strings.Reader
 	if form == nil {
@@ -291,3 +456,26 @@ func csrfToken(t *testing.T, body string) string {
 	}
 	return matches[1]
 }
+
+func createKey(t *testing.T, body string) string {
+	t.Helper()
+	matches := createKeyPattern.FindStringSubmatch(body)
+	if len(matches) != 2 || matches[1] == "" {
+		t.Fatalf("no create key in response body: %q", body)
+	}
+	return matches[1]
+}
+
+func authenticate(t *testing.T, router http.Handler) *http.Cookie {
+	t.Helper()
+	page := serve(router, http.MethodGet, "/login", nil, nil)
+	login := serve(router, http.MethodPost, "/login", url.Values{
+		"csrf_token": {csrfToken(t, page.Body.String())},
+		"username":   {"admin"},
+		"password":   {"test-password"},
+	}, sessionCookie(t, page))
+	if login.Code != http.StatusSeeOther {
+		t.Fatalf("authenticate status = %d, want 303", login.Code)
+	}
+	return sessionCookie(t, login)
+}

admin/internal/tasks/store.go

@@ -0,0 +1,129 @@
+package tasks
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"time"
+)
+
+const sqliteWriteTimeout = 2 * time.Second
+
+type Store interface {
+	CreateDraft(context.Context, Draft) (Draft, error)
+	ListDrafts(context.Context) ([]Draft, error)
+}
+type SQLiteStore struct {
+	database   *sql.DB
+	now        func() time.Time
+	createGate chan struct{}
+}
+
+func NewSQLiteStore(database *sql.DB) (*SQLiteStore, error) {
+	if database == nil {
+		return nil, errors.New("database is required")
+	}
+	if _, err := database.Exec("SELECT 1 FROM tasks LIMIT 1"); err != nil {
+		return nil, fmt.Errorf("tasks migration is not available: %w", err)
+	}
+	return &SQLiteStore{database: database, now: time.Now, createGate: make(chan struct{}, 1)}, nil
+}
+
+func (store *SQLiteStore) CreateDraft(ctx context.Context, draft Draft) (Draft, error) {
+	writeContext, cancel := context.WithTimeout(ctx, sqliteWriteTimeout)
+	defer cancel()
+	// SQLite permits one writer at a time. Serializing this store's short create
+	// transaction prevents concurrent retries of one create key from surfacing as busy.
+	select {
+	case store.createGate <- struct{}{}:
+		defer func() { <-store.createGate }()
+	case <-writeContext.Done():
+		return Draft{}, writeContext.Err()
+	}
+	draft.CreatedAt = store.now().UTC()
+	transaction, err := store.database.BeginTx(writeContext, nil)
+	if err != nil {
+		return Draft{}, err
+	}
+	defer transaction.Rollback()
+	_, err = transaction.ExecContext(writeContext, `INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, version, created_at, updated_at) VALUES (?, 'MANUAL', ?, ?, ?, ?, ?, ?, 'DRAFT', 1, ?, ?)`, draft.ID, draft.Title, draft.GoodsID, draft.SKUColor, draft.SKUSize, draft.Quantity, draft.MaxTotalPrice, draft.CreatedAt.Format(time.RFC3339Nano), draft.CreatedAt.Format(time.RFC3339Nano))
+	if err == nil {
+		if err := transaction.Commit(); err != nil {
+			return Draft{}, err
+		}
+		return draft, nil
+	}
+	existing, found, currentPhase, lookupErr := findDraft(writeContext, transaction, draft.ID)
+	if lookupErr != nil {
+		return Draft{}, lookupErr
+	}
+	if found && currentPhase && samePayload(existing, draft) {
+		if err := transaction.Commit(); err != nil {
+			return Draft{}, err
+		}
+		return existing, nil
+	}
+	if found {
+		return Draft{}, ErrCreateKeyConflict
+	}
+	return Draft{}, err
+}
+
+func (store *SQLiteStore) ListDrafts(ctx context.Context) ([]Draft, error) {
+	// rowid makes equal timestamps deterministic: SQLite assigns it in insertion order,
+	// whereas UUID v4 is deliberately not time-sortable.
+	rows, err := store.database.QueryContext(ctx, `SELECT id, title, goods_id, sku_color, sku_size, quantity, max_total_price, created_at FROM tasks WHERE source = 'MANUAL' AND status = 'DRAFT' ORDER BY created_at DESC, rowid DESC`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	result := []Draft{}
+	for rows.Next() {
+		draft, err := scanDraft(rows)
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, draft)
+	}
+	return result, rows.Err()
+}
+
+func findDraft(ctx context.Context, transaction *sql.Tx, id string) (Draft, bool, bool, error) {
+	row := transaction.QueryRowContext(ctx, `SELECT id, title, goods_id, sku_color, sku_size, quantity, max_total_price, created_at, source, status, version FROM tasks WHERE id = ?`, id)
+	var draft Draft
+	var created, source, status string
+	var version int
+	err := row.Scan(&draft.ID, &draft.Title, &draft.GoodsID, &draft.SKUColor, &draft.SKUSize, &draft.Quantity, &draft.MaxTotalPrice, &created, &source, &status, &version)
+	if errors.Is(err, sql.ErrNoRows) {
+		return Draft{}, false, false, nil
+	}
+	if err != nil {
+		return Draft{}, false, false, err
+	}
+	parsed, err := time.Parse(time.RFC3339Nano, created)
+	if err != nil {
+		return Draft{}, false, false, err
+	}
+	draft.CreatedAt = parsed
+	return draft, true, source == "MANUAL" && status == "DRAFT" && version == 1, nil
+}
+
+type scanner interface{ Scan(...any) error }
+
+func scanDraft(row scanner) (Draft, error) {
+	var draft Draft
+	var created string
+	if err := row.Scan(&draft.ID, &draft.Title, &draft.GoodsID, &draft.SKUColor, &draft.SKUSize, &draft.Quantity, &draft.MaxTotalPrice, &created); err != nil {
+		return Draft{}, err
+	}
+	parsed, err := time.Parse(time.RFC3339Nano, created)
+	if err != nil {
+		return Draft{}, err
+	}
+	draft.CreatedAt = parsed
+	return draft, nil
+}
+func samePayload(left, right Draft) bool {
+	return left.ID == right.ID && left.Title == right.Title && left.GoodsID == right.GoodsID && left.SKUColor == right.SKUColor && left.SKUSize == right.SKUSize && left.Quantity == right.Quantity && left.MaxTotalPrice == right.MaxTotalPrice
+}

admin/internal/tasks/tasks.go

@@ -0,0 +1,159 @@
+// Package tasks 定义手工 DRAFT 任务的校验与窄仓储边界。
+package tasks
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const (
+	maxTitleLength = 120
+	maxSKUText     = 80
+)
+
+var ErrCreateKeyConflict = errors.New("create key conflicts with a different task")
+
+type Draft struct {
+	ID            string
+	Title         string
+	GoodsID       string
+	SKUColor      string
+	SKUSize       string
+	Quantity      int
+	MaxTotalPrice string
+	CreatedAt     time.Time
+}
+
+type Form struct{ CreateKey, Title, ProductURL, SKUColor, SKUSize, Quantity, MaxTotalPrice string }
+type Errors map[string]string
+
+func (errors Errors) Valid() bool { return len(errors) == 0 }
+
+// Validate trims and normalizes a user form. It never reads a product page or derives price data.
+func Validate(form Form) (Draft, Errors) {
+	draft := Draft{ID: strings.TrimSpace(form.CreateKey), Title: strings.TrimSpace(form.Title), SKUColor: strings.TrimSpace(form.SKUColor), SKUSize: strings.TrimSpace(form.SKUSize)}
+	errors := Errors{}
+	if !validUUID(draft.ID) {
+		errors["create_key"] = "创建请求已过期，请重新打开表单。"
+	}
+	if draft.Title == "" || len([]rune(draft.Title)) > maxTitleLength {
+		errors["title"] = "任务名称不能为空，且不能超过 120 个字符。"
+	}
+	if draft.SKUColor == "" || len([]rune(draft.SKUColor)) > maxSKUText {
+		errors["sku_color"] = "颜色分类不能为空，且不能超过 80 个字符。"
+	}
+	if draft.SKUSize == "" || len([]rune(draft.SKUSize)) > maxSKUText {
+		errors["sku_size"] = "尺码不能为空，且不能超过 80 个字符。"
+	}
+	goodsID, ok := CanonicalGoodsID(strings.TrimSpace(form.ProductURL))
+	if !ok {
+		errors["product_url"] = "请输入唯一的 canonical 商品链接。"
+	} else {
+		draft.GoodsID = goodsID
+	}
+	quantity, err := strconv.ParseInt(strings.TrimSpace(form.Quantity), 10, 0)
+	if err != nil || quantity < 1 {
+		errors["quantity"] = "数量必须是正整数。"
+	} else {
+		draft.Quantity = int(quantity)
+	}
+	money, ok := normalizeMoney(strings.TrimSpace(form.MaxTotalPrice))
+	if !ok {
+		errors["max_total_price"] = "价格上限必须大于零，且最多两位小数。"
+	} else {
+		draft.MaxTotalPrice = money
+	}
+	return draft, errors
+}
+
+// CanonicalGoodsID only accepts the one verified manual-entry URL shape; untrusted query data is discarded.
+func CanonicalGoodsID(value string) (string, bool) {
+	if value == "" || strings.Contains(value, "\\") || strings.Contains(value, "%") {
+		return "", false
+	}
+	parsed, err := url.ParseRequestURI(value)
+	if err != nil || parsed.Scheme != "https" || parsed.Host != "mobile.yangkeduo.com" || parsed.User != nil || parsed.Port() != "" || parsed.Path != "/goods.html" || parsed.Fragment != "" {
+		return "", false
+	}
+	values, err := url.ParseQuery(parsed.RawQuery)
+	if err != nil {
+		return "", false
+	}
+	goodsIDs := values["goods_id"]
+	if len(goodsIDs) != 1 || goodsIDs[0] == "" {
+		return "", false
+	}
+	for _, character := range goodsIDs[0] {
+		if character < '0' || character > '9' {
+			return "", false
+		}
+	}
+	return goodsIDs[0], true
+}
+
+func CanonicalURL(goodsID string) string {
+	return "https://mobile.yangkeduo.com/goods.html?goods_id=" + goodsID
+}
+
+func NewCreateKey() (string, error) {
+	bytes := make([]byte, 16)
+	if _, err := rand.Read(bytes); err != nil {
+		return "", err
+	}
+	bytes[6] = (bytes[6] & 0x0f) | 0x40
+	bytes[8] = (bytes[8] & 0x3f) | 0x80
+	hexValue := hex.EncodeToString(bytes)
+	return hexValue[0:8] + "-" + hexValue[8:12] + "-" + hexValue[12:16] + "-" + hexValue[16:20] + "-" + hexValue[20:32], nil
+}
+
+func validUUID(value string) bool {
+	if len(value) != 36 {
+		return false
+	}
+	for index, character := range value {
+		if index == 8 || index == 13 || index == 18 || index == 23 {
+			if character != '-' {
+				return false
+			}
+			continue
+		}
+		if !(character >= '0' && character <= '9' || character >= 'a' && character <= 'f') {
+			return false
+		}
+	}
+	return value[14] == '4' && (value[19] == '8' || value[19] == '9' || value[19] == 'a' || value[19] == 'b')
+}
+
+func normalizeMoney(value string) (string, bool) {
+	parts := strings.Split(value, ".")
+	if len(parts) > 2 || parts[0] == "" || len(parts) == 2 && (len(parts[1]) == 0 || len(parts[1]) > 2) {
+		return "", false
+	}
+	for _, character := range parts[0] {
+		if character < '0' || character > '9' {
+			return "", false
+		}
+	}
+	fraction := ""
+	if len(parts) == 2 {
+		fraction = parts[1]
+		for _, character := range fraction {
+			if character < '0' || character > '9' {
+				return "", false
+			}
+		}
+	}
+	whole := strings.TrimLeft(parts[0], "0")
+	if whole == "" {
+		whole = "0"
+	}
+	if whole == "0" && strings.Trim(fraction, "0") == "" {
+		return "", false
+	}
+	return whole + "." + (fraction + "00")[:2], true
+}

admin/internal/tasks/tasks_test.go

@@ -0,0 +1,300 @@
+package tasks
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"path/filepath"
+	"regexp"
+	"runtime"
+	"sync"
+	"testing"
+	"time"
+
+	"cmbuyer/admin/internal/migrations"
+	"cmbuyer/admin/internal/storage/sqlite"
+)
+
+const testKey = "a3c9f507-7473-4fa6-8d71-8786c34c6301"
+
+func TestValidateNormalizesManualDraft(t *testing.T) {
+	draft, validation := Validate(Form{
+		CreateKey:     " " + testKey + " ",
+		Title:         "  夏季上衣  ",
+		ProductURL:    "https://mobile.yangkeduo.com/goods.html?goods_id=937122477375&utm_source=untrusted",
+		SKUColor:      " 黑色CHA(纯棉) ",
+		SKUSize:       " M(建议100-115) ",
+		Quantity:      "2",
+		MaxTotalPrice: "00012.8",
+	})
+	if !validation.Valid() {
+		t.Fatalf("Validate errors = %#v", validation)
+	}
+	if draft.ID != testKey || draft.GoodsID != "937122477375" || draft.Title != "夏季上衣" || draft.SKUColor != "黑色CHA(纯棉)" || draft.SKUSize != "M(建议100-115)" || draft.Quantity != 2 || draft.MaxTotalPrice != "12.80" {
+		t.Fatalf("normalized draft = %#v", draft)
+	}
+}
+
+func TestValidateRejectsInvalidFieldsAndURLs(t *testing.T) {
+	base := Form{CreateKey: testKey, Title: "title", ProductURL: "https://mobile.yangkeduo.com/goods.html?goods_id=1", SKUColor: "black", SKUSize: "M", Quantity: "1", MaxTotalPrice: "1"}
+	for name, update := range map[string]func(*Form){
+		"empty title":       func(form *Form) { form.Title = "  " },
+		"long color":        func(form *Form) { form.SKUColor = string(make([]rune, maxSKUText+1)) },
+		"fraction quantity": func(form *Form) { form.Quantity = "1.5" },
+		"zero quantity":     func(form *Form) { form.Quantity = "0" },
+		"too many decimals": func(form *Form) { form.MaxTotalPrice = "1.234" },
+		"trailing decimal":  func(form *Form) { form.MaxTotalPrice = "1." },
+		"zero money":        func(form *Form) { form.MaxTotalPrice = "0.00" },
+	} {
+		t.Run(name, func(t *testing.T) {
+			form := base
+			update(&form)
+			if _, validation := Validate(form); validation.Valid() {
+				t.Fatal("invalid form was accepted")
+			}
+		})
+	}
+
+	for _, value := range []string{
+		"http://mobile.yangkeduo.com/goods.html?goods_id=1",
+		"https://yangkeduo.com/goods.html?goods_id=1",
+		"https://mobile.yangkeduo.com:443/goods.html?goods_id=1",
+		"https://user@mobile.yangkeduo.com/goods.html?goods_id=1",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=1#fragment",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=1&goods_id=2",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=one",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=%31",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=1%26goods_id%3D2",
+		"https://mobile.yangkeduo.com/goods.html?goods_id=1;uin=bad",
+		"https://mobile.yangkeduo.com/other.html?goods_id=1",
+	} {
+		if _, ok := CanonicalGoodsID(value); ok {
+			t.Fatalf("CanonicalGoodsID accepted %q", value)
+		}
+	}
+}
+
+func TestNormalizeMoneyBoundaries(t *testing.T) {
+	for value, want := range map[string]string{"1": "1.00", "1.2": "1.20", "000.01": "0.01", "999999999999999999": "999999999999999999.00"} {
+		got, ok := normalizeMoney(value)
+		if !ok || got != want {
+			t.Fatalf("normalizeMoney(%q) = (%q, %t), want (%q, true)", value, got, ok, want)
+		}
+	}
+	for _, value := range []string{"0", "0.0", "0.00", "1.", ".1", "1.000", "-1", "1e2", " 1"} {
+		if got, ok := normalizeMoney(value); ok {
+			t.Fatalf("normalizeMoney(%q) = %q, want rejection", value, got)
+		}
+	}
+}
+
+func TestNewCreateKeyIsUUIDv4(t *testing.T) {
+	key, err := NewCreateKey()
+	if err != nil {
+		t.Fatalf("NewCreateKey: %v", err)
+	}
+	if !regexp.MustCompile(`^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$`).MatchString(key) {
+		t.Fatalf("create key %q is not UUID v4", key)
+	}
+}
+
+func TestSQLiteStoreRequiresMigratedDatabase(t *testing.T) {
+	database := openDatabase(t)
+	if _, err := NewSQLiteStore(database); err == nil {
+		t.Fatal("NewSQLiteStore accepted an unmigrated database")
+	}
+}
+
+func TestSQLiteStoreCreatesListsAndHandlesIdempotency(t *testing.T) {
+	database := migratedDatabase(t)
+	store, err := NewSQLiteStore(database)
+	if err != nil {
+		t.Fatalf("NewSQLiteStore: %v", err)
+	}
+	baseTime := time.Date(2026, 8, 4, 9, 0, 0, 0, time.UTC)
+	call := 0
+	store.now = func() time.Time {
+		result := baseTime.Add(time.Duration(call) * time.Minute)
+		call++
+		return result
+	}
+	first := testDraft(testKey, "first")
+	created, err := store.CreateDraft(context.Background(), first)
+	if err != nil {
+		t.Fatalf("create first draft: %v", err)
+	}
+	replayed, err := store.CreateDraft(context.Background(), first)
+	if err != nil {
+		t.Fatalf("replay first draft: %v", err)
+	}
+	if replayed.CreatedAt != created.CreatedAt {
+		t.Fatalf("replayed CreatedAt = %s, want original %s", replayed.CreatedAt, created.CreatedAt)
+	}
+	second := testDraft("b3c9f507-7473-4fa6-8d71-8786c34c6301", "second")
+	if _, err := store.CreateDraft(context.Background(), second); err != nil {
+		t.Fatalf("create second draft: %v", err)
+	}
+	drafts, err := store.ListDrafts(context.Background())
+	if err != nil {
+		t.Fatalf("list drafts: %v", err)
+	}
+	if len(drafts) != 2 || drafts[0].ID != second.ID || drafts[1].ID != first.ID {
+		t.Fatalf("draft order = %#v, want second then first", drafts)
+	}
+	var source, status string
+	var version int
+	if err := database.QueryRow(`SELECT source, status, version FROM tasks WHERE id = ?`, first.ID).Scan(&source, &status, &version); err != nil {
+		t.Fatalf("read stored task: %v", err)
+	}
+	if source != "MANUAL" || status != "DRAFT" || version != 1 {
+		t.Fatalf("stored metadata = (%q, %q, %d)", source, status, version)
+	}
+
+	conflicting := first
+	conflicting.Title = "different"
+	if _, err := store.CreateDraft(context.Background(), conflicting); !errors.Is(err, ErrCreateKeyConflict) {
+		t.Fatalf("conflicting create error = %v, want ErrCreateKeyConflict", err)
+	}
+}
+
+func TestSQLiteStoreRollsBackFailedCreate(t *testing.T) {
+	database := migratedDatabase(t)
+	store, err := NewSQLiteStore(database)
+	if err != nil {
+		t.Fatalf("NewSQLiteStore: %v", err)
+	}
+	if _, err := database.Exec(`CREATE TRIGGER reject_task BEFORE INSERT ON tasks BEGIN SELECT RAISE(ABORT, 'reject test insert'); END`); err != nil {
+		t.Fatalf("create trigger: %v", err)
+	}
+	if _, err := store.CreateDraft(context.Background(), testDraft(testKey, "blocked")); err == nil {
+		t.Fatal("CreateDraft succeeded despite rejecting trigger")
+	}
+	drafts, err := store.ListDrafts(context.Background())
+	if err != nil {
+		t.Fatalf("list after failed create: %v", err)
+	}
+	if len(drafts) != 0 {
+		t.Fatalf("failed create persisted drafts: %#v", drafts)
+	}
+}
+
+func TestSQLiteStoreUsesInsertionOrderForEqualTimesAndFiltersPhase(t *testing.T) {
+	database := migratedDatabase(t)
+	store, err := NewSQLiteStore(database)
+	if err != nil {
+		t.Fatalf("NewSQLiteStore: %v", err)
+	}
+	store.now = func() time.Time { return time.Date(2026, 8, 4, 9, 0, 0, 0, time.UTC) }
+	first := testDraft(testKey, "first")
+	second := testDraft("b3c9f507-7473-4fa6-8d71-8786c34c6301", "second")
+	for _, draft := range []Draft{first, second} {
+		if _, err := store.CreateDraft(context.Background(), draft); err != nil {
+			t.Fatalf("create %s: %v", draft.Title, err)
+		}
+	}
+	if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, version, created_at, updated_at) VALUES ('excel-draft', 'EXCEL', 'other', '1', 'black', 'M', 1, '1.00', 'DRAFT', 1, '2026-08-04T10:00:00Z', '2026-08-04T10:00:00Z'), ('manual-pending', 'MANUAL', 'other', '2', 'black', 'M', 1, '1.00', 'PENDING', 1, '2026-08-04T10:00:00Z', '2026-08-04T10:00:00Z')`); err != nil {
+		t.Fatalf("insert out-of-scope tasks: %v", err)
+	}
+	drafts, err := store.ListDrafts(context.Background())
+	if err != nil {
+		t.Fatalf("list drafts: %v", err)
+	}
+	if len(drafts) != 2 || drafts[0].ID != second.ID || drafts[1].ID != first.ID {
+		t.Fatalf("equal-time draft order/filter = %#v, want second then first only", drafts)
+	}
+	if _, err := database.Exec(`UPDATE tasks SET status = 'PENDING' WHERE id = ?`, first.ID); err != nil {
+		t.Fatalf("move draft outside current phase: %v", err)
+	}
+	if _, err := store.CreateDraft(context.Background(), first); !errors.Is(err, ErrCreateKeyConflict) {
+		t.Fatalf("replay of non-DRAFT record error = %v, want conflict", err)
+	}
+	third := testDraft("c3c9f507-7473-4fa6-8d71-8786c34c6301", "third")
+	if _, err := database.Exec(`INSERT INTO tasks (id, source, title, goods_id, sku_color, sku_size, quantity, max_total_price, status, version, created_at, updated_at) VALUES (?, 'EXCEL', ?, ?, ?, ?, ?, ?, 'DRAFT', 1, '2026-08-04T09:00:00Z', '2026-08-04T09:00:00Z')`, third.ID, third.Title, third.GoodsID, third.SKUColor, third.SKUSize, third.Quantity, third.MaxTotalPrice); err != nil {
+		t.Fatalf("insert same-payload EXCEL record: %v", err)
+	}
+	if _, err := store.CreateDraft(context.Background(), third); !errors.Is(err, ErrCreateKeyConflict) {
+		t.Fatalf("replay of non-MANUAL record error = %v, want conflict", err)
+	}
+	if _, err := database.Exec(`UPDATE tasks SET version = 2, source = 'MANUAL' WHERE id = ?`, third.ID); err != nil {
+		t.Fatalf("change replay record version: %v", err)
+	}
+	if _, err := store.CreateDraft(context.Background(), third); !errors.Is(err, ErrCreateKeyConflict) {
+		t.Fatalf("replay of non-v1 record error = %v, want conflict", err)
+	}
+}
+
+func TestSQLiteStoreConcurrentIdenticalCreateIsOneDraft(t *testing.T) {
+	store, err := NewSQLiteStore(migratedDatabase(t))
+	if err != nil {
+		t.Fatalf("NewSQLiteStore: %v", err)
+	}
+	const callers = 20
+	start := make(chan struct{})
+	errors := make(chan error, callers)
+	results := make(chan Draft, callers)
+	var group sync.WaitGroup
+	for range callers {
+		group.Add(1)
+		go func() {
+			defer group.Done()
+			<-start
+			draft, err := store.CreateDraft(context.Background(), testDraft(testKey, "same"))
+			if err != nil {
+				errors <- err
+				return
+			}
+			results <- draft
+		}()
+	}
+	close(start)
+	group.Wait()
+	close(errors)
+	close(results)
+	for err := range errors {
+		t.Fatalf("concurrent create: %v", err)
+	}
+	for result := range results {
+		if result.ID != testKey {
+			t.Fatalf("concurrent result = %#v", result)
+		}
+	}
+	drafts, err := store.ListDrafts(context.Background())
+	if err != nil {
+		t.Fatalf("list after concurrent create: %v", err)
+	}
+	if len(drafts) != 1 || drafts[0].ID != testKey {
+		t.Fatalf("concurrent creates persisted %#v, want exactly one", drafts)
+	}
+}
+
+func testDraft(id, title string) Draft {
+	return Draft{ID: id, Title: title, GoodsID: "937122477375", SKUColor: "black", SKUSize: "M", Quantity: 2, MaxTotalPrice: "12.80"}
+}
+
+func openDatabase(t *testing.T) *sql.DB {
+	t.Helper()
+	database, err := sqlite.Open(filepath.Join(t.TempDir(), "tasks.db"))
+	if err != nil {
+		t.Fatalf("open database: %v", err)
+	}
+	t.Cleanup(func() { _ = database.Close() })
+	return database
+}
+
+func migratedDatabase(t *testing.T) *sql.DB {
+	t.Helper()
+	database := openDatabase(t)
+	if err := migrations.Up(context.Background(), database, migrationDirectory(t)); err != nil {
+		t.Fatalf("migrate database: %v", err)
+	}
+	return database
+}
+
+func migrationDirectory(t *testing.T) string {
+	t.Helper()
+	_, file, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("locate test source")
+	}
+	return filepath.Join(filepath.Dir(file), "..", "..", "migrations")
+}

admin/internal/transport/webui/templates/tasks.html

@@ -6,22 +6,14 @@
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>采购任务 · 采购服务</title>
   <style>
-    :root { color-scheme:light; --bg:#f4f7fb; --surface:#fff; --text:#172033; --muted:#526079; --border:#cfd8e6; --primary:#155eef; --focus:#ffbf47; font-family:"Segoe UI","Microsoft YaHei UI",system-ui,sans-serif; }
-    * { box-sizing:border-box; } body { min-height:100dvh; margin:0; color:var(--text); background:var(--bg); font-size:16px; line-height:1.55; } button { font:inherit; } :focus-visible { outline:3px solid var(--focus); outline-offset:3px; }
-    .skip-link { position:fixed; z-index:10; top:8px; left:8px; padding:10px 14px; color:#fff; background:var(--text); transform:translateY(-160%); } .skip-link:focus { transform:translateY(0); }
-    header { display:flex; min-height:64px; align-items:center; justify-content:space-between; gap:16px; padding:10px clamp(16px,4vw,40px); border-bottom:1px solid var(--border); background:var(--surface); }
-    .brand { display:flex; align-items:center; gap:10px; font-weight:700; } .brand-mark { display:grid; width:32px; height:32px; place-items:center; border-radius:8px; color:#fff; background:var(--primary); font-size:.82rem; }
-    .logout { min-height:44px; padding:8px 14px; border:1px solid var(--border); border-radius:8px; color:var(--text); background:var(--surface); font-weight:700; cursor:pointer; }
-    main { width:min(100% - 32px,760px); margin:48px auto; padding:32px; border:1px solid var(--border); border-radius:14px; background:var(--surface); }
-    h1 { margin:0; font-size:clamp(1.5rem,5vw,2rem); } p { color:var(--muted); } .notice { margin-top:24px; padding:14px; border-left:4px solid var(--primary); border-radius:6px; background:#eaf1ff; color:#29466f; }
-    @media (max-width:420px) { main { width:calc(100% - 24px); margin:24px auto; padding:24px 16px; } }
-    @media (prefers-reduced-motion:reduce) { *,*::before,*::after { transition-duration:.01ms !important; animation-duration:.01ms !important; } }
-  </style>
+    :root{--bg:#f4f7fb;--surface:#fff;--text:#172033;--muted:#526079;--border:#cfd8e6;--primary:#155eef;--danger:#b42318;--success:#067647;--focus:#ffbf47;font-family:"Segoe UI","Microsoft YaHei UI",system-ui,sans-serif}*{box-sizing:border-box}html{min-width:320px;background:var(--bg)}body{min-height:100dvh;margin:0;color:var(--text);background:var(--bg);font-size:16px;line-height:1.55}button,input{font:inherit}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.skip{position:fixed;z-index:100;top:8px;left:8px;padding:10px;color:#fff;background:#172033;transform:translateY(-160%)}.skip:focus{transform:translateY(0)}header{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;padding:10px clamp(16px,4vw,40px);border-bottom:1px solid var(--border);background:var(--surface)}.brand{font-weight:700}.brand b{display:inline-grid;place-items:center;width:32px;height:32px;margin-right:8px;border-radius:8px;background:var(--primary);color:#fff;font-size:.82rem}.logout,.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 14px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:#fff;font-weight:700;text-decoration:none;cursor:pointer}.button.primary{border-color:var(--primary);background:var(--primary);color:#fff}.button:disabled,.filter input:disabled{opacity:.5;cursor:not-allowed}main{width:min(100% - 32px,1200px);margin:32px auto}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.toolbar-actions,.filters,.actions{display:flex;flex-wrap:wrap;gap:10px}.muted,.placeholder{color:var(--muted)}.filters{align-items:end;margin:0 0 16px}.filters label{display:grid;gap:4px;font-weight:700}.filters input{min-height:44px;min-width:180px;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:#fff}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;background:var(--surface)}table{width:100%;min-width:880px;border-collapse:collapse}th,td{padding:12px 14px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}th{background:#f8fafc;font-size:.88rem}td a{color:#124cc5;font-weight:700;text-underline-offset:3px}.status{display:inline-block;padding:3px 8px;border-radius:999px;background:#eaf1ff;color:#173d8f;font-size:.85rem;font-weight:700}.empty,.success{padding:20px;border:1px solid var(--border);border-radius:12px;background:var(--surface)}.success{margin:0 0 16px;border-color:#9dd9b8;background:#ecfdf3;color:var(--success)}.modal-scrim{position:fixed;z-index:20;inset:0;background:rgba(23,32,51,.52)}dialog[open]{position:fixed;z-index:30;top:50%;left:50%;width:min(calc(100% - 24px),640px);max-height:calc(100dvh - 24px);margin:0;padding:28px;overflow-y:auto;border:1px solid var(--border);border-radius:14px;box-shadow:0 18px 48px rgba(23,32,51,.24);transform:translate(-50%,-50%);background:var(--surface)}.form-page{width:min(100% - 32px,640px);margin:32px auto;padding:28px;border:1px solid var(--border);border-radius:14px;background:var(--surface)}.form-grid{display:grid;gap:16px}.field label{display:block;margin-bottom:6px;font-weight:700}.required{color:var(--danger)}.field input{width:100%;min-height:44px;padding:10px 12px;border:1px solid #9ba9bc;border-radius:8px}.field input[aria-invalid=true]{border-color:var(--danger)}.error{margin:5px 0 0;color:var(--danger);font-size:.9rem}.summary{margin:0 0 16px;padding:12px;border-left:4px solid var(--danger);background:#fef3f2;color:var(--danger)}.summary p{margin:0}.summary ul{margin:8px 0 0;padding-left:20px}.summary a{color:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:420px){main,.form-page{width:calc(100% - 24px);margin:24px auto}.toolbar{align-items:stretch;flex-direction:column}.toolbar-actions,.toolbar .button{width:100%}.toolbar-actions .button{flex:1}.filters{align-items:stretch;flex-direction:column}.filters input,.filters .button{width:100%}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}}</style>
 </head>
 <body>
-  <a class="skip-link" href="#main">跳到主要内容</a>
-  <header><div class="brand"><span class="brand-mark" aria-hidden="true">采</span><span>采购服务</span></div><form method="post" action="/logout"><input type="hidden" name="csrf_token" value="{{.CSRFToken}}"><button class="logout" type="submit">退出登录</button></form></header>
-  <main id="main"><h1>采购任务</h1><p>任务功能正在准备中。</p><p class="notice">当前页面仅用于验证管理员会话。</p></main>
+  <a class="skip" href="#main">跳到主要内容</a>
+  <header><div class="brand"><b aria-hidden="true">采</b>采购服务</div><form method="post" action="/logout"><input type="hidden" name="csrf_token" value="{{.CSRFToken}}"><button class="logout" type="submit">退出登录</button></form></header>
+  {{if .FullPage}}<main class="form-page" id="main">{{template "form" .}}</main>{{else}}<main id="main"><div class="toolbar"><div><h1>采购任务</h1><p class="muted">只显示待开始的手工任务。</p></div><div class="toolbar-actions"><button class="button" type="button" disabled>导入</button><a class="button primary" href="/tasks?create=1">创建任务</a></div></div><div class="filters" aria-label="暂不可用的列表条件"><label>关键词<input type="search" disabled></label><button class="button" type="button" disabled>筛选</button><button class="button" type="button" disabled>清除</button></div>{{if .Success}}<p class="success" role="status">任务已创建，已显示在列表首行。</p>{{end}}{{if .Drafts}}<div class="table-wrap"><table><thead><tr><th scope="col"><input type="checkbox" disabled aria-label="选择全部任务"></th><th scope="col">标题</th><th scope="col">颜色分类</th><th scope="col">尺码</th><th scope="col">价格上限</th><th scope="col">数量</th><th scope="col">采购结果</th><th scope="col">状态</th><th scope="col">创建时间</th></tr></thead><tbody>{{range .Drafts}}<tr><td><input type="checkbox" disabled aria-label="选择任务 {{.Title}}"></td><td><a href="https://mobile.yangkeduo.com/goods.html?goods_id={{.GoodsID}}" target="_blank" rel="noopener noreferrer">{{.Title}}</a></td><td>{{.SKUColor}}</td><td>{{.SKUSize}}</td><td>¥{{.MaxTotalPrice}}</td><td>{{.Quantity}}</td><td>—</td><td><span class="status">待开始</span></td><td><time datetime="{{.CreatedAt.Format "2006-01-02T15:04:05Z07:00"}}">{{.CreatedAt.Format "2006-01-02 15:04 UTC"}}</time></td></tr>{{end}}</tbody></table></div>{{else}}<section class="empty"><h2>还没有待开始任务</h2><p>创建一条手工任务后会显示在这里。</p></section>{{end}}</main>{{if .OpenForm}}<div class="modal-scrim" aria-hidden="true"></div><dialog open aria-modal="true" aria-labelledby="form-title">{{template "form" .}}</dialog>{{end}}{{end}}
 </body>
 </html>
 {{end}}
+{{define "form"}}<h1 id="form-title">创建采购任务</h1><p class="muted">保存后仅生成待开始任务，不会执行其他动作。</p>{{if .Errors}}<div class="summary" role="alert" aria-live="assertive"><p>请修正下列字段后再保存。</p><ul>{{with index .Errors "title"}}<li><a href="#title">任务名称：{{.}}</a></li>{{end}}{{with index .Errors "product_url"}}<li><a href="#product_url">商品链接：{{.}}</a></li>{{end}}{{with index .Errors "sku_color"}}<li><a href="#sku_color">颜色分类：{{.}}</a></li>{{end}}{{with index .Errors "sku_size"}}<li><a href="#sku_size">尺码：{{.}}</a></li>{{end}}{{with index .Errors "quantity"}}<li><a href="#quantity">数量：{{.}}</a></li>{{end}}{{with index .Errors "max_total_price"}}<li><a href="#max_total_price">价格上限：{{.}}</a></li>{{end}}{{with index .Errors "create_key"}}<li>{{.}}</li>{{end}}</ul></div>{{end}}<form method="post" action="/tasks" class="form-grid"><input type="hidden" name="csrf_token" value="{{.CSRFToken}}"><input type="hidden" name="create_key" value="{{.Form.CreateKey}}"><input type="hidden" name="form_mode" value="{{if .FullPage}}full{{else}}dialog{{end}}">{{template "field" (list "title" "任务名称" .Form.Title .Errors .FocusField)}}{{template "field" (list "product_url" "商品链接" .Form.ProductURL .Errors .FocusField)}}{{template "field" (list "sku_color" "颜色分类" .Form.SKUColor .Errors .FocusField)}}{{template "field" (list "sku_size" "尺码" .Form.SKUSize .Errors .FocusField)}}{{template "field" (list "quantity" "数量" .Form.Quantity .Errors .FocusField)}}{{template "field" (list "max_total_price" "价格上限" .Form.MaxTotalPrice .Errors .FocusField)}}<div class="actions"><button class="button primary" type="submit">保存任务</button><a class="button" href="/tasks">取消</a></div></form>{{end}}
+{{define "field"}}{{$name:=index . 0}}{{$label:=index . 1}}{{$value:=index . 2}}{{$errors:=index . 3}}{{$focus:=index . 4}}<div class="field"><label for="{{$name}}">{{$label}} <span class="required" aria-hidden="true">*</span><span class="sr-only">（必填）</span></label><input id="{{$name}}" name="{{$name}}" value="{{$value}}" required {{if eq $focus $name}}autofocus{{end}} aria-invalid="{{if index $errors $name}}true{{else}}false{{end}}"{{with index $errors $name}} aria-describedby="{{$name}}-error"{{end}} {{if eq $name "product_url"}}type="url" inputmode="url" maxlength="2048"{{else if eq $name "quantity"}}type="number" inputmode="numeric" min="1" step="1"{{else if eq $name "max_total_price"}}type="text" inputmode="decimal" pattern="[0-9]+(\.[0-9]{1,2})?" maxlength="64"{{else if eq $name "title"}}type="text" maxlength="120"{{else}}type="text" maxlength="80"{{end}}>{{with index $errors $name}}<p class="error" id="{{$name}}-error">{{.}}</p>{{end}}</div>{{end}}

admin/internal/transport/webui/webui.go

@@ -5,12 +5,14 @@ import (
 	"embed"
 	"html/template"
 	"io"
+
+	"cmbuyer/admin/internal/tasks"
 )
 
 //go:embed templates/*.html
 var templateFiles embed.FS
 
-var templates = template.Must(template.New("webui").ParseFS(templateFiles, "templates/*.html"))
+var templates = template.Must(template.New("webui").Funcs(template.FuncMap{"list": func(values ...any) []any { return values }}).ParseFS(templateFiles, "templates/*.html"))
 
 // LoginData 是登录页面所需的非敏感展示数据。
 type LoginData struct {
@@ -20,9 +22,16 @@ type LoginData struct {
 	Error     string
 }
 
-// TasksData 是当前受保护任务空壳所需的数据。任务字段将在后续任务实现。
+// TasksData 是受保护的 DRAFT 建单与列表页面所需数据。
 type TasksData struct {
 	CSRFToken  string
+	Drafts     []tasks.Draft
+	Form       tasks.Form
+	Errors     tasks.Errors
+	OpenForm   bool
+	FullPage   bool
+	FocusField string
+	Success    bool
 }
 
 // RenderLogin 写入登录页。
@@ -30,7 +39,7 @@ func RenderLogin(writer io.Writer, data LoginData) error {
 	return templates.ExecuteTemplate(writer, "login.html", data)
 }
 
-// RenderTasks 写入登录后的受保护空壳。
+// RenderTasks 写入登录后的受保护任务页。
 func RenderTasks(writer io.Writer, data TasksData) error {
 	return templates.ExecuteTemplate(writer, "tasks.html", data)
 }

admin/migrations/00002_single_pass_model.sql

@@ -0,0 +1,333 @@
+-- +goose Up
+-- v1 的试选/锁旧价记录无法安全推断为单趟执行事实。先在同一事务中拒绝它们，
+-- 避免删除审计数据后再尝试猜测映射。
+CREATE TABLE single_pass_upgrade_guard (
+  valid INTEGER NOT NULL CHECK (valid = 1)
+);
+
+INSERT INTO single_pass_upgrade_guard (valid)
+SELECT CASE WHEN
+  (SELECT COUNT(*) FROM spec_trials) = 0
+  AND (SELECT COUNT(*) FROM order_authorizations) = 0
+  AND (SELECT COUNT(*) FROM order_submissions) = 0
+  AND (SELECT COUNT(*) FROM tasks WHERE source <> 'MANUAL' OR status <> 'DRAFT') = 0
+  -- v2 的金额边界是严格正数；不把 v1 中不能无损纳入该边界的数据悄悄改写。
+  AND (SELECT COUNT(*) FROM tasks WHERE
+    max_total_price = ''
+    OR max_total_price GLOB '*[^0-9.]*'
+    OR length(max_total_price) - length(replace(max_total_price, '.', '')) > 1
+    OR max_total_price = '.'
+    OR (instr(max_total_price, '.') > 0 AND (
+      instr(max_total_price, '.') = 1
+      OR length(max_total_price) = instr(max_total_price, '.')
+      OR length(max_total_price) - instr(max_total_price, '.') > 2
+    ))
+    OR replace(replace(max_total_price, '.', ''), '0', '') = ''
+  ) = 0
+THEN 1 ELSE 0 END;
+
+DROP TABLE single_pass_upgrade_guard;
+
+ALTER TABLE tasks RENAME TO tasks_v1;
+DROP TABLE order_submissions;
+DROP TABLE order_authorizations;
+DROP TABLE spec_trials;
+
+CREATE TABLE tasks (
+  id TEXT PRIMARY KEY,
+  source TEXT NOT NULL CHECK (source IN ('MANUAL', 'EXCEL', 'ERP')),
+  source_ref TEXT,
+  title TEXT NOT NULL,
+  goods_id TEXT NOT NULL,
+  sku_color TEXT NOT NULL,
+  sku_size TEXT NOT NULL,
+  quantity INTEGER NOT NULL CHECK (quantity > 0 AND typeof(quantity) = 'integer'),
+  max_total_price TEXT NOT NULL CHECK (
+    max_total_price <> ''
+    AND max_total_price NOT GLOB '*[^0-9.]*'
+    AND length(max_total_price) - length(replace(max_total_price, '.', '')) <= 1
+    AND max_total_price <> '.'
+    AND (instr(max_total_price, '.') = 0 OR (
+      instr(max_total_price, '.') > 1
+      AND length(max_total_price) > instr(max_total_price, '.')
+      AND length(max_total_price) - instr(max_total_price, '.') <= 2
+    ))
+    AND replace(replace(max_total_price, '.', ''), '0', '') <> ''
+  ),
+  reference_asset_id TEXT,
+  status TEXT NOT NULL CHECK (status IN (
+    'DRAFT', 'PENDING', 'CLAIMED', 'ORDERING', 'NEEDS_MANUAL', 'WAITING_PAYMENT',
+    'RECONCILIATION_REQUIRED', 'SUCCEEDED', 'FAILED', 'CANCELED'
+  )),
+  version INTEGER NOT NULL DEFAULT 1 CHECK (version > 0 AND typeof(version) = 'integer'),
+  created_at TEXT NOT NULL,
+  updated_at TEXT NOT NULL
+);
+
+INSERT INTO tasks (
+  id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price,
+  reference_asset_id, status, version, created_at, updated_at
+)
+SELECT
+  id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price,
+  reference_asset_id, status, version, created_at, updated_at
+FROM tasks_v1;
+
+DROP TABLE tasks_v1;
+
+CREATE TABLE order_authorizations (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL REFERENCES tasks(id),
+  task_version INTEGER NOT NULL CHECK (task_version > 0 AND typeof(task_version) = 'integer'),
+  start_key TEXT NOT NULL,
+  goods_id TEXT NOT NULL,
+  sku_color TEXT NOT NULL,
+  sku_size TEXT NOT NULL,
+  quantity INTEGER NOT NULL CHECK (quantity > 0 AND typeof(quantity) = 'integer'),
+  total_price_cap TEXT NOT NULL CHECK (
+    total_price_cap <> ''
+    AND total_price_cap NOT GLOB '*[^0-9.]*'
+    AND length(total_price_cap) - length(replace(total_price_cap, '.', '')) <= 1
+    AND total_price_cap <> '.'
+    AND (instr(total_price_cap, '.') = 0 OR (
+      instr(total_price_cap, '.') > 1
+      AND length(total_price_cap) > instr(total_price_cap, '.')
+      AND length(total_price_cap) - instr(total_price_cap, '.') <= 2
+    ))
+    AND replace(replace(total_price_cap, '.', ''), '0', '') <> ''
+  ),
+  status TEXT NOT NULL CHECK (status IN ('ACTIVE', 'CLAIMED', 'FENCED', 'CONSUMED', 'EXPIRED', 'ABANDONED')),
+  created_by TEXT NOT NULL,
+  created_at TEXT NOT NULL,
+  expires_at TEXT NOT NULL,
+  UNIQUE (task_id, task_version),
+  UNIQUE (start_key, task_id),
+  UNIQUE (task_id, id)
+);
+
+CREATE TABLE purchase_attempts (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL,
+  authorization_id TEXT NOT NULL,
+  claim_generation INTEGER NOT NULL CHECK (claim_generation > 0 AND typeof(claim_generation) = 'integer'),
+  status TEXT NOT NULL CHECK (status IN ('CLAIMED', 'ORDERING', 'FAILED', 'FENCED', 'ABANDONED')),
+  gate1_unit_price TEXT CHECK (
+    gate1_unit_price IS NULL OR (
+      gate1_unit_price <> ''
+      AND gate1_unit_price NOT GLOB '*[^0-9.]*'
+      AND length(gate1_unit_price) - length(replace(gate1_unit_price, '.', '')) <= 1
+      AND gate1_unit_price <> '.'
+      AND (instr(gate1_unit_price, '.') = 0 OR (
+        instr(gate1_unit_price, '.') > 1
+        AND length(gate1_unit_price) > instr(gate1_unit_price, '.')
+        AND length(gate1_unit_price) - instr(gate1_unit_price, '.') <= 2
+      ))
+      AND replace(replace(gate1_unit_price, '.', ''), '0', '') <> ''
+    )
+  ),
+  gate2_unit_price TEXT CHECK (
+    gate2_unit_price IS NULL OR (
+      gate2_unit_price <> ''
+      AND gate2_unit_price NOT GLOB '*[^0-9.]*'
+      AND length(gate2_unit_price) - length(replace(gate2_unit_price, '.', '')) <= 1
+      AND gate2_unit_price <> '.'
+      AND (instr(gate2_unit_price, '.') = 0 OR (
+        instr(gate2_unit_price, '.') > 1
+        AND length(gate2_unit_price) > instr(gate2_unit_price, '.')
+        AND length(gate2_unit_price) - instr(gate2_unit_price, '.') <= 2
+      ))
+      AND replace(replace(gate2_unit_price, '.', ''), '0', '') <> ''
+    )
+  ),
+  quantity_read INTEGER CHECK (quantity_read IS NULL OR (quantity_read > 0 AND typeof(quantity_read) = 'integer')),
+  confirm_amount TEXT CHECK (
+    confirm_amount IS NULL OR (
+      confirm_amount <> ''
+      AND confirm_amount NOT GLOB '*[^0-9.]*'
+      AND length(confirm_amount) - length(replace(confirm_amount, '.', '')) <= 1
+      AND confirm_amount <> '.'
+      AND (instr(confirm_amount, '.') = 0 OR (
+        instr(confirm_amount, '.') > 1
+        AND length(confirm_amount) > instr(confirm_amount, '.')
+        AND length(confirm_amount) - instr(confirm_amount, '.') <= 2
+      ))
+      AND replace(replace(confirm_amount, '.', ''), '0', '') <> ''
+    )
+  ),
+  failure_code TEXT CHECK (failure_code IS NULL OR failure_code IN (
+    'AUTHORIZATION_EXPIRED', 'LEASE_LOST', 'GATE_1_REJECTED', 'QUANTITY_MISMATCH',
+    'GATE_2_REJECTED', 'GATE_3_REJECTED', 'FENCE_REJECTED', 'SAFE_ABORTED'
+  )),
+  started_at TEXT NOT NULL,
+  finished_at TEXT,
+  UNIQUE (task_id, claim_generation),
+  UNIQUE (task_id, id),
+  UNIQUE (task_id, authorization_id, id),
+  FOREIGN KEY (task_id, authorization_id) REFERENCES order_authorizations(task_id, id)
+);
+
+CREATE TABLE order_submissions (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL,
+  authorization_id TEXT NOT NULL,
+  attempt_id TEXT NOT NULL,
+  status TEXT NOT NULL CHECK (status IN ('FENCED', 'SUBMITTED', 'RECONCILIATION_REQUIRED', 'MANUAL_RESOLVED')),
+  gate1_unit_price TEXT NOT NULL CHECK (
+    gate1_unit_price <> ''
+    AND gate1_unit_price NOT GLOB '*[^0-9.]*'
+    AND length(gate1_unit_price) - length(replace(gate1_unit_price, '.', '')) <= 1
+    AND gate1_unit_price <> '.'
+    AND (instr(gate1_unit_price, '.') = 0 OR (
+      instr(gate1_unit_price, '.') > 1
+      AND length(gate1_unit_price) > instr(gate1_unit_price, '.')
+      AND length(gate1_unit_price) - instr(gate1_unit_price, '.') <= 2
+    ))
+    AND replace(replace(gate1_unit_price, '.', ''), '0', '') <> ''
+  ),
+  gate2_unit_price TEXT NOT NULL CHECK (
+    gate2_unit_price <> ''
+    AND gate2_unit_price NOT GLOB '*[^0-9.]*'
+    AND length(gate2_unit_price) - length(replace(gate2_unit_price, '.', '')) <= 1
+    AND gate2_unit_price <> '.'
+    AND (instr(gate2_unit_price, '.') = 0 OR (
+      instr(gate2_unit_price, '.') > 1
+      AND length(gate2_unit_price) > instr(gate2_unit_price, '.')
+      AND length(gate2_unit_price) - instr(gate2_unit_price, '.') <= 2
+    ))
+    AND replace(replace(gate2_unit_price, '.', ''), '0', '') <> ''
+  ),
+  quantity_read INTEGER NOT NULL CHECK (quantity_read > 0 AND typeof(quantity_read) = 'integer'),
+  confirm_amount TEXT NOT NULL CHECK (
+    confirm_amount <> ''
+    AND confirm_amount NOT GLOB '*[^0-9.]*'
+    AND length(confirm_amount) - length(replace(confirm_amount, '.', '')) <= 1
+    AND confirm_amount <> '.'
+    AND (instr(confirm_amount, '.') = 0 OR (
+      instr(confirm_amount, '.') > 1
+      AND length(confirm_amount) > instr(confirm_amount, '.')
+      AND length(confirm_amount) - instr(confirm_amount, '.') <= 2
+    ))
+    AND replace(replace(confirm_amount, '.', ''), '0', '') <> ''
+  ),
+  created_at TEXT NOT NULL,
+  resolved_at TEXT,
+  UNIQUE (authorization_id),
+  UNIQUE (attempt_id),
+  FOREIGN KEY (task_id, authorization_id, attempt_id) REFERENCES purchase_attempts(task_id, authorization_id, id)
+);
+
+-- +goose Down
+-- 只有尚未产生任何单趟授权或执行事实的纯 MANUAL/DRAFT 数据才能无损回到 v1。
+CREATE TABLE single_pass_downgrade_guard (
+  valid INTEGER NOT NULL CHECK (valid = 1)
+);
+
+INSERT INTO single_pass_downgrade_guard (valid)
+SELECT CASE WHEN
+  (SELECT COUNT(*) FROM order_authorizations) = 0
+  AND (SELECT COUNT(*) FROM purchase_attempts) = 0
+  AND (SELECT COUNT(*) FROM order_submissions) = 0
+  AND (SELECT COUNT(*) FROM tasks WHERE source <> 'MANUAL' OR status <> 'DRAFT') = 0
+THEN 1 ELSE 0 END;
+
+DROP TABLE single_pass_downgrade_guard;
+
+ALTER TABLE tasks RENAME TO tasks_v2;
+DROP TABLE order_submissions;
+DROP TABLE purchase_attempts;
+DROP TABLE order_authorizations;
+
+CREATE TABLE tasks (
+  id TEXT PRIMARY KEY,
+  source TEXT NOT NULL CHECK (source IN ('MANUAL', 'EXCEL', 'ERP')),
+  source_ref TEXT,
+  title TEXT NOT NULL,
+  goods_id TEXT NOT NULL,
+  sku_color TEXT NOT NULL,
+  sku_size TEXT NOT NULL,
+  quantity INTEGER NOT NULL CHECK (quantity > 0 AND typeof(quantity) = 'integer'),
+  max_total_price TEXT NOT NULL CHECK (
+    max_total_price <> ''
+    AND max_total_price NOT GLOB '*[^0-9.]*'
+    AND length(max_total_price) - length(replace(max_total_price, '.', '')) <= 1
+    AND max_total_price <> '.'
+    AND (instr(max_total_price, '.') = 0 OR (
+      instr(max_total_price, '.') > 1
+      AND length(max_total_price) > instr(max_total_price, '.')
+      AND length(max_total_price) - instr(max_total_price, '.') <= 2
+    ))
+  ),
+  reference_asset_id TEXT,
+  status TEXT NOT NULL CHECK (status IN (
+    'DRAFT', 'PENDING', 'CLAIMED', 'RUNNING', 'WAITING_CONFIRMATION',
+    'PENDING_RETRIAL', 'AUTHORIZED', 'ORDERING', 'WAITING_PAYMENT',
+    'RECONCILIATION_REQUIRED', 'NEEDS_MANUAL', 'SUCCEEDED', 'CANCELED'
+  )),
+  version INTEGER NOT NULL DEFAULT 1 CHECK (version > 0 AND typeof(version) = 'integer'),
+  created_at TEXT NOT NULL,
+  updated_at TEXT NOT NULL
+);
+
+INSERT INTO tasks (
+  id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price,
+  reference_asset_id, status, version, created_at, updated_at
+)
+SELECT
+  id, source, source_ref, title, goods_id, sku_color, sku_size, quantity, max_total_price,
+  reference_asset_id, status, version, created_at, updated_at
+FROM tasks_v2;
+
+DROP TABLE tasks_v2;
+
+CREATE TABLE spec_trials (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL REFERENCES tasks(id),
+  attempt INTEGER NOT NULL CHECK (attempt > 0 AND typeof(attempt) = 'integer'),
+  product_title TEXT NOT NULL,
+  selected_color TEXT NOT NULL,
+  selected_size TEXT NOT NULL,
+  unit_price TEXT NOT NULL CHECK (unit_price <> '' AND unit_price NOT GLOB '*[^0-9.]*' AND length(unit_price) - length(replace(unit_price, '.', '')) <= 1 AND unit_price <> '.' AND (instr(unit_price, '.') = 0 OR (instr(unit_price, '.') > 1 AND length(unit_price) > instr(unit_price, '.') AND length(unit_price) - instr(unit_price, '.') <= 2))),
+  total_price TEXT NOT NULL CHECK (total_price <> '' AND total_price NOT GLOB '*[^0-9.]*' AND length(total_price) - length(replace(total_price, '.', '')) <= 1 AND total_price <> '.' AND (instr(total_price, '.') = 0 OR (instr(total_price, '.') > 1 AND length(total_price) > instr(total_price, '.') AND length(total_price) - instr(total_price, '.') <= 2))),
+  evidence_sha256 TEXT NOT NULL,
+  created_at TEXT NOT NULL,
+  UNIQUE (task_id, attempt),
+  UNIQUE (task_id, id)
+);
+
+CREATE TABLE order_authorizations (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL REFERENCES tasks(id),
+  spec_trial_id TEXT NOT NULL REFERENCES spec_trials(id),
+  version INTEGER NOT NULL CHECK (version > 0 AND typeof(version) = 'integer'),
+  goods_id TEXT NOT NULL,
+  sku_color TEXT NOT NULL,
+  sku_size TEXT NOT NULL,
+  quantity INTEGER NOT NULL CHECK (quantity > 0 AND typeof(quantity) = 'integer'),
+  authorized_unit_price TEXT NOT NULL CHECK (authorized_unit_price <> '' AND authorized_unit_price NOT GLOB '*[^0-9.]*' AND length(authorized_unit_price) - length(replace(authorized_unit_price, '.', '')) <= 1 AND authorized_unit_price <> '.' AND (instr(authorized_unit_price, '.') = 0 OR (instr(authorized_unit_price, '.') > 1 AND length(authorized_unit_price) > instr(authorized_unit_price, '.') AND length(authorized_unit_price) - instr(authorized_unit_price, '.') <= 2))),
+  total_price_cap TEXT NOT NULL CHECK (total_price_cap <> '' AND total_price_cap NOT GLOB '*[^0-9.]*' AND length(total_price_cap) - length(replace(total_price_cap, '.', '')) <= 1 AND total_price_cap <> '.' AND (instr(total_price_cap, '.') = 0 OR (instr(total_price_cap, '.') > 1 AND length(total_price_cap) > instr(total_price_cap, '.') AND length(total_price_cap) - instr(total_price_cap, '.') <= 2))),
+  note TEXT,
+  status TEXT NOT NULL CHECK (status IN ('PENDING_DELIVERY', 'DELIVERED', 'ACKNOWLEDGED', 'EXECUTING', 'FENCED', 'CONSUMED', 'SUPERSEDED', 'EXPIRED')),
+  created_by TEXT NOT NULL,
+  created_at TEXT NOT NULL,
+  expires_at TEXT NOT NULL,
+  UNIQUE (task_id, version),
+  UNIQUE (task_id, id),
+  FOREIGN KEY (task_id, spec_trial_id) REFERENCES spec_trials(task_id, id)
+);
+
+CREATE TABLE order_submissions (
+  id TEXT PRIMARY KEY,
+  task_id TEXT NOT NULL REFERENCES tasks(id),
+  authorization_id TEXT NOT NULL REFERENCES order_authorizations(id),
+  command_id TEXT NOT NULL,
+  dry_run_id TEXT NOT NULL,
+  status TEXT NOT NULL CHECK (status IN ('FENCED', 'SUBMITTED', 'RECONCILIATION_REQUIRED', 'MANUAL_RESOLVED')),
+  verified_unit_price TEXT NOT NULL CHECK (verified_unit_price <> '' AND verified_unit_price NOT GLOB '*[^0-9.]*' AND length(verified_unit_price) - length(replace(verified_unit_price, '.', '')) <= 1 AND verified_unit_price <> '.' AND (instr(verified_unit_price, '.') = 0 OR (instr(verified_unit_price, '.') > 1 AND length(verified_unit_price) > instr(verified_unit_price, '.') AND length(verified_unit_price) - instr(verified_unit_price, '.') <= 2))),
+  quantity_read INTEGER NOT NULL CHECK (quantity_read > 0 AND typeof(quantity_read) = 'integer'),
+  confirm_page_amount TEXT NOT NULL CHECK (confirm_page_amount <> '' AND confirm_page_amount NOT GLOB '*[^0-9.]*' AND length(confirm_page_amount) - length(replace(confirm_page_amount, '.', '')) <= 1 AND confirm_page_amount <> '.' AND (instr(confirm_page_amount, '.') = 0 OR (instr(confirm_page_amount, '.') > 1 AND length(confirm_page_amount) > instr(confirm_page_amount, '.') AND length(confirm_page_amount) - instr(confirm_page_amount, '.') <= 2))),
+  created_at TEXT NOT NULL,
+  resolved_at TEXT,
+  UNIQUE (authorization_id),
+  UNIQUE (command_id),
+  FOREIGN KEY (task_id, authorization_id) REFERENCES order_authorizations(task_id, id)
+);

docs/tasks/T-202.md

@@ -0,0 +1,75 @@
+---
+id: T-202
+title: 手工建单与 DRAFT 基础列表
+phase: 2
+deps: [T-201, T-004, T-005]
+status: DONE
+created: 2026-08-04
+vikunja_task_id: 27
+context_ref: 1c35155
+work_branch: task/t-202-admin-draft
+needs_device: false
+needs_human_review: false
+write_paths:
+  - docs/tasks/T-202.md
+  - admin/cmd/server/main.go
+  - admin/internal/config/**
+  - admin/internal/server/**
+  - admin/internal/tasks/**
+  - admin/internal/storage/sqlite/**
+  - admin/internal/transport/webui/**
+  - admin/README.md
+---
+
+<!-- BEGIN VIKUNJA EXPORT id=27 synced=2026-08-04T08:32:16Z sha256=39e3b06bab4ca86e97b961a4eb6bb0a4f1e88b29dae4d50f916779f7e761424c -->
+## 问题 / 背景
+
+T-201 已提供管理员会话；T-004 已提供 tasks 表。根据 T-010 加速门禁，T-103 尚未完成时只允许实现不启动试选的 DRAFT 手工建单与基础列表。
+
+## 关联需求与交互
+
+F-001、US-001、IX-002；GET /tasks、GET /tasks/new、POST /tasks；沿用已确认的传统表格与创建弹窗/直达页。
+
+## 方案
+
+1. 显式数据库配置并打开已迁移 SQLite；以仓储接口隔离 HTTP 和 SQL，创建事务只写 MANUAL、DRAFT、version=1。
+2. 表单校验任务名称、canonical 拼多多链接、颜色分类、尺码、正整数数量和正十进制总额上限；金额只用字符串并规范为两位小数。链接只接受 HTTPS mobile.yangkeduo.com/goods.html 且 goods_id 为唯一纯数字参数，额外查询参数不进入数据库。
+3. 以服务端生成的 create_key 同时作为任务 ID；重复相同 key 和相同内容返回原结果，不创建第二条，内容不同则冲突。
+4. GET /tasks 默认 created_at DESC 显示 DRAFT 基础表格；创建入口用服务端渲染的 modal 状态，/tasks/new 复用同一表单作为无脚本兜底；失败保留非密码输入并显示字段错误，成功 303 回列表且新任务第一行。
+5. 页面只显示需求字段、采购结果占位、DRAFT 状态与创建时间；不读取或伪造规格面板价格/证据，不提供勾选开始试选、状态推进、详情或设备接口。
+
+## 验收要点
+
+- 覆盖创建成功、倒序第一行、严格链接/goods_id、数量、金额、空白/长度、CSRF/未登录、幂等重放与冲突、SQL 错误 fail closed。
+- 弹窗与 /tasks/new 共享校验；错误保留输入并可访问；标题只链接到由 goods_id 重建的 canonical PDD URL并使用安全新标签属性。
+- go test ./...、go test -race ./...、go vet ./...、go build ./...、完整 init.ps1、上下文校验和 diff-check 通过。
+
+## 执行记录
+
+### 2026-08-04T08:30:47Z · ila
+
+已完成：DRAFT 手工建单与基础列表；已验证链接、金额、CSRF、幂等、SQLite 并发和 SSR 无障碍，Go 与上下文门禁均通过。
+<!-- END VIKUNJA EXPORT -->
+
+## 边界
+
+- 本任务只创建 `source=MANUAL`、`status=DRAFT`、`version=1` 的任务并显示 DRAFT 基础列表；不得
+  实现勾选、批量开始试选、`DRAFT → PENDING` 或任何其他状态流转，也不得新增设备领取接口。
+- 不增加或修改数据库 schema，不读写 `spec_trials`、`order_authorizations`、`order_submissions`，
+  不生成或展示机器实际规格、规格面板单价、截图、证据哈希或 PDD 页面判据。
+- 启动服务必须从显式 `CMBUYER_DATABASE_SOURCE` 读取 SQLite data source；缺失时明确失败，不提供
+  隐式内存库或仓库内默认数据库。服务不自动猜迁移目录；README 必须先给出显式迁移命令。
+- 商品链接只接受 `https://mobile.yangkeduo.com/goods.html`，且必须恰有一个纯数字 `goods_id`；
+  拒绝 userinfo、端口、fragment、重复参数、其他 host/scheme/path 和编码绕过。数据库只保存 goods_id，
+  展示链接由 goods_id 重建 canonical URL；`uin` 等额外查询参数既不保存也不回显。
+- 标题、颜色分类、尺码必须去除首尾空白后非空并受明确长度上限约束；数量必须是可表示的正整数；
+  总额上限必须是大于零、最多两位小数的十进制字符串并规范为两位小数。金额校验、保存与展示均不得
+  使用浮点数或从其他数字推测。
+- `create_key` 由服务端用 `crypto/rand` 生成并验证格式，同时作为任务 ID；相同 key 与相同规范化内容
+  重放只能返回原任务，不得二次 INSERT，相同 key 携带不同内容必须冲突。SQL 必须参数化，创建失败
+  不得留下半条或未知状态记录。
+- `GET /tasks`、`GET /tasks/new`、`POST /tasks` 都必须复用 T-201 管理会话；POST 必须验证 CSRF。
+  校验失败保留非敏感输入并逐字段提示，数据库内部错误只给通用响应，不泄露 SQL、路径或凭据。
+- 页面只使用服务端模板转义；标题商品链接在新标签打开时必须带 `noopener noreferrer`。导入按钮只作
+  禁用占位；不得加载外部资源或把原型假数据、真机数据、地址、手机号带进生产页面。
+- 不实现或引用试选、数量设置、订单确认、提交围栏、提交订单、付款、免密支付或先用后付能力。

docs/tasks/T-209.md

@@ -0,0 +1,66 @@
+---
+id: T-209
+title: 把核心 schema / 状态机迁移为单趟模型
+phase: 2
+deps: [T-004, T-111]
+status: DONE
+created: 2026-08-04
+vikunja_task_id: 29
+context_ref: da540bf
+work_branch: task/t-209-single-pass-schema
+needs_device: false
+needs_human_review: false
+write_paths:
+  - docs/tasks/T-209.md
+  - admin/migrations/**
+  - admin/internal/migrations/**
+  - admin/internal/domain/**
+---
+
+<!-- BEGIN VIKUNJA EXPORT id=29 synced=2026-08-04T08:38:26Z sha256=2cac52971eda168b1d17bc4b6930f97876324d5685af26dc26495de07b44cb7d -->
+## 问题 / 背景
+
+T-111 已把业务契约改为管理员点击“开始采购”即授权桌面端在同一趟创建待付款订单；现有 SQLite v1 与领域模型仍是旧两趟结构，包含 spec_trials、authorized_unit_price 及 WAITING_CONFIRMATION/PENDING_RETRIAL/AUTHORIZED/RUNNING 等旧状态。T-203 不能在旧结构上继续实现。
+
+## 关联需求与交互
+
+T-111；F-004、F-005、F-008、F-017、F-018；docs/04-architecture.md 第四、五节；不包含页面选择器或真机操作。
+
+## 方案
+
+1. 保留 00001_core_data.sql 作为不可变迁移历史，新增 00002 单趟模型迁移；迁移只允许保留既有 MANUAL+DRAFT 任务，发现任一旧 spec_trials/authorization/submission 数据或非 DRAFT 任务即整体失败并回滚，不能猜测映射。
+2. 重建 tasks 的状态约束为 DRAFT、PENDING、CLAIMED、ORDERING、NEEDS_MANUAL、WAITING_PAYMENT、RECONCILIATION_REQUIRED、SUCCEEDED、FAILED、CANCELED；保留 DRAFT 内容、版本与时间。
+3. 删除旧 spec_trials 结构；重建 order_authorizations，锁定 task_version/start_key/goods_id/颜色/尺码/数量/total_price_cap，状态仅 ACTIVE/CLAIMED/FENCED/CONSUMED/EXPIRED/ABANDONED，不保存 observed/authorized unit price。
+4. 新增 purchase_attempts 保存 claim generation、三闸门摘要和固定 failure code；重建 order_submissions，原子关联同一 task/authorization/attempt，保存 gate1、gate2、quantity、confirm amount，并限制一份授权/attempt 最多一条围栏。
+5. 同步 Go 领域实体和 fail-closed 状态机；围栏前允许安全失败/重置，FENCED 后授权只能 CONSUMED，提交结果不明只能调和同一记录，任何未列出转移拒绝。
+6. Down 迁移同样只在没有新业务执行数据且任务仍可无损回退时执行，否则失败并保持 v2；覆盖 up/down、幂等、DRAFT 保留、未知旧数据回滚、外键/唯一约束、金额 TEXT、状态转移与旧标识符消失测试。
+
+## 验收要点
+
+- 新 migration 不修改 00001；从空 v1 和仅含 DRAFT 的 v1 升级成功，DRAFT 字段逐项不变。
+- 任一旧执行/授权/提交记录或非 DRAFT 状态都使升级失败，版本和原数据保持 v1；没有半迁移。
+- 新 schema 无 spec_trials、authorized_unit_price、spec_trial_id、command_id、dry_run_id；包含 purchase_attempts 与架构规定的关系、唯一性、金额字符串和状态 CHECK。
+- 领域模型不再暴露旧两趟状态；未知状态或未列出的转移全部失败。第一趟试选/下单函数均不在本任务范围。
+- go test ./...、go test -race ./...、go vet ./...、go build ./...、完整 init.ps1、上下文校验和 diff-check 通过。
+
+## 执行记录
+
+（暂无）
+<!-- END VIKUNJA EXPORT -->
+
+## 边界
+
+- 本任务只迁移数据结构和纯领域状态机，不实现管理员“开始采购”HTTP/usecase、设备领取、租约、
+  attempt 写入 API、截图上传、提交围栏 API、页面自动化或任何真机动作；这些能力仍分别属于
+  T-203、T-205、T-208 与 Phase 3/4 任务。
+- 不修改已经发布的 `00001_core_data.sql`；只能追加 `00002`。Up/Down 都必须置于单个事务，前置
+  检查失败时版本、schema 和数据原样保留，不能删除、转换或猜测任何旧执行记录。
+- Up 只允许空库或仅含可无损保留的 `MANUAL + DRAFT` 任务。任一 `spec_trials`、旧
+  `order_authorizations`、旧 `order_submissions` 数据，或任一非 DRAFT / 非 MANUAL 任务均拒绝升级。
+- Down 只允许没有授权、attempt、submission 且全部任务都能无损回到 v1 DRAFT 的 v2 数据库；否则
+  拒绝回退。迁移测试不得为通过而临时关闭外键后漏恢复，也不得留下临时表或 guard 表。
+- 金额继续只用严格正十进制 `TEXT`；不得引入浮点数。新授权只锁定 `total_price_cap`，不得重新加入
+  `authorized_unit_price`、观察价格或 `spec_trial_id`。
+- `FENCED` 授权不得回到可领取、可过期或可放弃状态；围栏后的提交只能记录明确提交或进入同一记录
+  调和，不能提供重试、释放或第二次点击的状态转移。
+- 本任务不实现、不引用点击“提交订单”的函数，更不涉及支付、免密支付、先用后付或任何扣款动作。