feat: show all tags in tag mapper for icon setting

[fiddur]

Summary

• Tag mapper now shows all tags, not just Oura programmatic tags (UUIDs/tag_* prefixes)
• Manual, lastfm-auto, and calendar tags appear in the mapper so users can set icons on any tag
• Non-programmatic tags have their name field read-only (they already have human-readable names) but the icon field is editable

Changes

• packages/api-spec: Added is_programmatic boolean to programmaticTagSchema to distinguish tags needing name mapping vs icon-only
• apps/backend/src/db/tags.ts: getProgrammaticTags() now returns all tags — programmatic ones (with tag_key or matching UUID/tag_* patterns) and regular ones (grouped by tag name with isProgrammatic: false)
• apps/backend/src/routes/tags-router.ts: GET /tags/programmatic passes is_programmatic flag and sets current_name to the tag name for non-programmatic tags
• apps/backend/src/mcp/settings-tools.ts: MCP get_programmatic_tags tool updated with matching logic
• apps/web/src/components/TagMappingsSettings.tsx:
  • Name input is read-only for non-programmatic tags
  • "Unmapped" highlighting only applies to programmatic tags without a name
  • Tag key column hidden for non-programmatic tags
  • Description updated to reflect broader scope
• Integration tests: Updated existing tests and added new ones for non-programmatic tag inclusion

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 31.49%. Comparing base (1adbaf3) to head (b71afca).
⚠️ Report is 3 commits behind head on develop.

Files with missing lines	Patch %	Lines
apps/backend/src/routes/tags-router.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #285      +/-   ##
===========================================
+ Coverage    31.43%   31.49%   +0.06%     
===========================================
  Files          181      181              
  Lines        22986    22982       -4     
  Branches      1856     1860       +4     
===========================================
+ Hits          7225     7239      +14     
+ Misses       15727    15709      -18     
  Partials        34       34              

Flag	Coverage Δ
backend	58.18% <77.77%> (+0.10%)	⬆️

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