Merge remote-tracking branch 'origin/master' into feat/plan-mode

17 master merges (GUI host/web stack, compact header, dshweb, fast local
hooks, windows coverage skips, worktree runtime). Conflicts:
- packages/ui/user-interaction/src/index.ts: master extracted the question
  types to types.ts; took the re-export and grafted our detail field (the
  plan-review payload) into the extracted AskUserQuestionItem.
- generated catalogs regenerated over both sides.

The module graph crossed mermaid's default 500-edge render guard with the
GUI packages plus our plan-mode edges; raised maxEdges in verify-mermaid
(a secure config settable only at initialize).

Note: the remote branch also renamed packages/mode -> packages/plan
(PR #512 plan-mode-simplification, fast-forwarded before this merge).

docs/core-data-structures/core.md

@@ -235,6 +235,12 @@ interface GenerateOptions {
    * it; replay uses it to keep concurrent parent and child cursors independent.
    */
   sessionId?: Branded<'SessionId'>
+  /**
+   * Provider-neutral classification for an auxiliary model call. Adapters may
+   * map the purpose to model-hidden transport metadata. Ordinary conversation
+   * requests leave it unset.
+   */
+  purpose?: 'compaction'
 }
 ```