[allenporter]

Summary

Implements #162 (Magic Handwritten To-Do Sync — stacked on #472):

• Database Model & Migration (NoteTaskSyncDO / f_note_task_sync):
  • Tracks per-page task extraction state and tombstones (ACTIVE, SUPERSEDED, DELETED_REMOTE, CANCELLED, ERASED) scoped by user_id without leaking OCR/processor concerns into ScheduleService.
• TaskExtractionModule (supernote/server/services/processor_modules/task_extraction.py):
  • Registered as a post-OCR notebook module in ProcessorService.global_post_modules (TaskType.TASK_EXTRACTION).
  • Creates/reuses the "From Notes" task group in ScheduleService and attaches ScheduleTaskLinkDTO Base64 deep-links (appName="Note", filePath, fileId, page, pageId, taskTitle) so tapping a task on a Supernote tablet jumps directly to the notebook page.
  • Bullet Journal Cross-Page Migration (> / < $\rightarrow$ •): Reconciles pages in page_index order so migrated tasks advance their deep-link and due_time to the newer page without creating duplicates, while tombstoning the earlier page as SUPERSEDED.
  • Edge-Triggered Completion & DELETED_REMOTE Tombstone: Preserves digital completions and remote deletions made in the To-Do app / Web UI across subsequent page edits.
  • Strikethrough (CANCELLED), Erasure (ERASED), and NoteDeletedEvent Cleanup: Removes open tasks from ScheduleService when crossed out, erased from a page, or when the source .note file is deleted.

Fixes #162

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.94581% with 53 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.22%. Comparing base (0b3c626) to head (da0e16e).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...rver/services/processor_modules/task_extraction.py	80.51%	45 Missing ⚠️
supernote/server/utils/task_parser.py	92.30%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #473      +/-   ##
==========================================
- Coverage   93.33%   93.22%   -0.12%     
==========================================
  Files         144      147       +3     
  Lines       14788    15192     +404     
==========================================
+ Hits        13803    14163     +360     
- Misses        985     1029      +44     

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