docs(changelog): update for v2.4.0

CHANGELOG.md

@@ -1,5 +1,35 @@
 # Changelog
 
+## v2.4.0 — 2026-07-27
+
+### Features
+
+- mark tasks and lists as manual (3a648b7)
+- per-model effort and turn presets (fde9615)
+- Interactive chip for tasks with an open ConPTY session (c93a20f)
+- spinners for ConPTY session start and task refine (1466d0f)
+- five-phase list-handler prompt with dedupe and enhance (e3bacc3)
+- allow update_task_status to set Cancelled (cc823ec)
+
+### Fixes
+
+- bind search focus to Ctrl+K instead of OemQuestion (7f9f0ca)
+- persist title edits from the detail pane (edd2774)
+
+### Refactoring
+
+- make the list-handler launch spec single-list and single-repo (4877802)
+- scope "Let Claude handle it" to a single list (40eb979)
+
+### Documentation
+
+- record the manual-task, effort-preset and chip/spinner changes (24f999f)
+- document the list-handler selection modal (62fc5aa)
+- describe the list-scoped five-phase handler (023e136)
+- implementation plan for the per-list task handler (ec10b06)
+- per-list task handler with read/dedupe/enhance/run/merge (81cf941)
+- update for v2.3.1 (538b4ed)
+
 ## v2.3.1 — 2026-07-24
 
 ### Fixes