docs(changelog): update for v2.13.0

CHANGELOG.md

@@ -1,5 +1,56 @@
 # Changelog
 
+## v2.13.0 — 2026-09-02
+
+### Features
+
+- Handler-Session vor dem Usage-Limit warnen und Handoff bis zum Reset zurueckhalten (fe818651)
+- start_list_handler MCP-Tool startet einen List-Handler-Run wie der Button (c2166a0d)
+- Handler-Session nach Usage-Limit-Reset automatisch neu starten (016b9203)
+- PowerUse-Zeitfenster + Handoff-Schwellwert als Settings (69898be5)
+- PowerUse-Toggle im Usage-Monitor, Opt-in pro Liste (19375254)
+- PowerUse-Addendum an die Handler-Prompts, Cap aus den Settings (453d61ca)
+- PowerUse-Flags und konfigurierbares Handoff-Budget (3cf9628f)
+- depends_on als Menge statt Einzelfeld (c25732cf)
+- surface the handoff round budget in the merge-helper handoff brief (81a5fc5d)
+- add ExpectsNoDiff flag for verification/audit tasks (0b506f52)
+- add dependency audit and diff-review threshold to list-handler prompts (9e805646)
+- add "move to list" to the task row context menu (80fe188a)
+- notes get their own list, a day log and an Enter chain (0f04b796)
+- add_note MCP tool with a per-day agent cap (ae0c7d37)
+
+### Fixes
+
+- carry ExpectsNoDiff into the relocated merge MCP tools (4ee1d05f)
+- stop Ui.Tests order-dependent flakiness on shared Loc.Current (dc1e67d0)
+- add failureReason field to batch_get_tasks (91220177)
+- make locale-parity test able to detect a malformed locale file (4c78a5d6)
+- don't leave an orphaned list behind on cancel (56bc1651)
+- stop treating git worktrees and submodules as repos (b6e5876b)
+- fix Bandel ticket sync and reactivate the integration (30d0611b)
+- Shift+Enter in the capture box, not just in the note rows (f6405804)
+- let Shift+Enter break the line, and clear the leftovers around the editor (b90c5855)
+- auto-bootstrap commit-less repos before creating worktrees (e0748ba3)
+- bootstrap commit-less repos and survive missing git identity (de44196b)
+
+### Performance
+
+- switch to workstation GC to cut idle memory (c347e4fc)
+
+### Refactoring
+
+- share StubWorkerClient between Ui.Tests and Worker.Tests (9f90e75a)
+- remove the stale-worker banner (6be62f02)
+
+### Documentation
+
+- Handler-Prompt praezisieren (Wave-Plan, Task-Split, review_task-Aufruf) (20b3b4ce)
+- Test-Scoping fuer Implementer-Tasks, PowerUse in den Explore-Notes (416997d7)
+- plan for multi-dependency depends_on relation table (84d955df)
+- empty-repo hardening notes + verification item (cf093e31)
+- spec + plan for empty-repo (unborn HEAD) hardening (fea8236e)
+- update for v2.12.0 (1d6cd49b)
+
 ## v2.12.0 — 2026-08-28
 
 ### Features