feat(109): checkbox multiselect filters

Phase 109 complete:
- Add checkbox dropdown enhancement for statistics multi-select filters
- Preserve GET contract for channels[] and status_groups[]
- Update PAUL plan context to read .paul/codebase docs

Co-Authored-By: Codex <noreply@openai.com>
This commit is contained in:
2026-04-28 22:13:52 +02:00
parent 1009957fff
commit 6d3dba89ed
13 changed files with 681 additions and 29 deletions

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