Fix L85: move launch.json from .claude/ to .vscode/ where VS Code reads it

.claude/launch.json was committed but VS Code reads launch configs from
.vscode/launch.json, so no tool was consuming it. Moved to the correct
location and removed the misplaced file from git tracking.

Also added .vscode/settings.json to .gitignore so local VS Code user
preferences don't end up tracked.

typecheck + 242 tests green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.gitignore

@@ -10,3 +10,6 @@ dist
 
 # Secrets — never commit
 .gitea-token
+
+# VS Code user settings (workspace settings/.vscode/launch.json are committed)
+.vscode/settings.json

CODE-AUDIT.md

@@ -541,7 +541,7 @@ token system + shared primitives (UI/SIMP — high value, larger effort) · i18n
   never consumes them.
 - [ ] **L84 — `dist/` accumulates unboundedly.** ~620 MB per build with no cleanup; it currently
   holds 0.1.0–0.5.0 Setup + portable artifacts (~3 GB). Add a clean step or prune.
-- [ ] **L85 — `.claude/launch.json` is committed and misplaced.** A VS Code launch config lives in
+- [x] **L85 — `.claude/launch.json` is committed and misplaced.** A VS Code launch config lives in
   `.claude/` (VS Code reads `.vscode/launch.json`), so no tool consumes it; it's also tracked
   (not gitignored).
 - [ ] **L86 — History select-all + filter change deletes hidden rows.** `selected` persists across a