steps 8+9: worklog + FTS5 search

STEP 8 — Worklog:
- Migration 006: worklog_entries table (node_id, date, minutes,
  approximate, billable, summary, details)
- WorklogService: Add, Get, Update, Delete, ListByNode, SumMinutes,
  Report (text report generator with total time)
- CLI: verstak log add/list/report  (verstak log --help for usage)
- GUI tab: entries list with date/time/approx, add form with
  minutes+text+approx checkbox, total minutes counter

STEP 9 — FTS5 Search:
- FTS5 virtual table created lazily by search.Rebuild()
  (works with/without FTS5 compiled in — graceful fallback)
- SearchService: Index, Remove, Rebuild, Search (with FTS5 MATCH)
- CLI: verstak index rebuild — builds search index from node titles
- GUI search bar uses /api/search?q= (FTS5 when available,
  fallback to LIKE on node titles)

Acceptance: go build ./... pass, go test ./... pass (all packages).

docs/PLAN.md

@@ -17,7 +17,7 @@
 | 4 | Vault Files: Trash + File Service + CLI File | ✅ выполнен |
 | 5 | Markdown Notes: Create/Read/Save + CLI Note | ✅ выполнен |
 | 6 | Wails GUI MVP: Sidebar + Main Panel | ✅ выполнен (Go HTTP SPA) |
-| 7 | Actions: Run URL/File/Command + GUI Tab | ⬜ не начат |
+| 7 | Actions: Run URL/File/Command + GUI Tab | ✅ выполнен |
 | 8 | Worklog: Entries + Report + GUI Tab | ⬜ не начат |
 | 9 | FTS5 Search: Rebuild Index + GUI Search Bar | ⬜ не начат |
 | 10 | DokuWiki Importer | ⬜ не начат |