annotate_frame draws Chinese labels (e.g. '确认摔倒 P-0001') using a CJK
font via Pillow when available (Windows uses Microsoft YaHei), and falls
back to the ASCII cv2 label when Pillow or a CJK font is missing. 86 tests
pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
cv2.putText only supports ASCII (Hershey fonts); the middle-dot in the
label rendered as garbage on saved screenshots. screenshot_label builds
an ASCII-only 'ID STATE' string for the annotation; the Qt live-view
label is unchanged. 72 tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
AlertDispatcher de-duplicates by event_id and fires each side effect once
per CONFIRMED: annotated screenshot, one JSONL line (config_version,
source_id, no rtsp/credentials), sound and popup via injectable sink.
44 tests pass; real-frame artifact smoke verified.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>