feat: persist template/batch-mode, per-aspect resets, de-dup template actions

§17.1 Preferences persistence:
- Wire the previously-unused config_service; remember and restore the
  last-selected template and last batch mode. main_window loads config,
  distributes initial values, then persists on change (save-on-change).
- template_panel: template_changed signal, select_template,
  current_template_state. queue_panel: set_batch_mode + batch_mode_changed.

§17.2 Independent resets:
- Replace the combined reset and 归零 with per-section 位置/尺寸/旋转 reset
  buttons (quiet ghost styling) that restore only their own aspect to the
  selected template. Size reset changes width/height only, leaving X/Y.

Button de-dup:
- Remove the export panel's 应用为模板 / 重置为模板 — literal duplicates of
  the template panel's 另存为 / 重置为模板. Template actions now live only
  in the template area; the export panel handles output only.

Docs: PRD (6.6/6.9/9/10), architecture (4.12), UI design (7.x/10),
development-rules (6, single-home actions + consistent naming), tasks.md (17).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/widgets/export_panel.py

@@ -2,7 +2,7 @@ import logging
 from pathlib import Path
 from typing import Optional
 
-from PySide6.QtCore import Qt, Signal
+from PySide6.QtCore import Qt
 from PySide6.QtWidgets import (
     QComboBox,
     QFileDialog,
@@ -24,10 +24,7 @@ logger = logging.getLogger(__name__)
 
 
 class ExportPanel(QWidget):
-    """Right-panel section: output settings and export / template actions."""
-
-    apply_as_template = Signal()    # "应用为模板" clicked
-    reset_to_template = Signal()    # "重置为模板" clicked
+    """Right-panel section: output settings and single-image export."""
 
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -58,7 +55,6 @@ class ExportPanel(QWidget):
         body_col.addLayout(self._make_format_form())
         body_col.addWidget(self._make_hint_label())
         body_col.addWidget(self._make_export_btn())
-        body_col.addLayout(self._make_secondary_btns())
 
         col.addWidget(body)
 
@@ -116,24 +112,6 @@ class ExportPanel(QWidget):
         self._export_btn.clicked.connect(self._do_export)
         return self._export_btn
 
-    def _make_secondary_btns(self) -> QHBoxLayout:
-        row = QHBoxLayout()
-        row.setSpacing(6)
-
-        apply_btn = QPushButton("应用为模板")
-        apply_btn.setObjectName("exportSecBtn")
-        apply_btn.setToolTip("将当前印花参数另存为新模板")
-        apply_btn.clicked.connect(lambda: self.apply_as_template.emit())
-
-        reset_btn = QPushButton("重置为模板")
-        reset_btn.setObjectName("exportSecBtn")
-        reset_btn.setToolTip("将印花参数还原为所选模板的默认值")
-        reset_btn.clicked.connect(lambda: self.reset_to_template.emit())
-
-        row.addWidget(apply_btn)
-        row.addWidget(reset_btn)
-        return row
-
     # ── public API ───────────────────────────────────────────────────────────
 
     def set_garment(self, path: Optional[str]):
@@ -284,13 +262,4 @@ class ExportPanel(QWidget):
                 background-color: #c8c8c8;
                 color: #888888;
             }
-            #exportSecBtn {
-                font-size: 12px;
-                padding: 4px 8px;
-                border: 1px solid #d6d6d6;
-                border-radius: 3px;
-                background: #f0f0f0;
-            }
-            #exportSecBtn:hover { background: #e0e0e0; }
-            #exportSecBtn:pressed { background: #d0d0d0; }
         """)