conductor(tracks): mark Unused Scripts Cleanup track as complete

Phase 6 verification complete: 5 atomic per-category commits landed,
non-GUI test suite passes, 2 audit scripts (main_thread_imports,
weak_types) report no new violations, ImGui linter reports the
3 pre-existing src/gui_2.py findings (src/ untouched by this
track; informational mode exit 0). scripts/ shrinks from 56 to
26 files (54% reduction).

conductor/tracks.md

@@ -443,3 +443,13 @@ User review surfaced five outstanding UI issues, each previously attempted witho
 - `test_prior_session_no_pop_imbalance` (deferred from v1) - `render_main_interface` is a kitchen-sink function requiring 50+ mocks; needs refactor or extensive mock additions.
 - `test_undo_redo_lifecycle` (NEW regression) - undo restores `temperature` correctly but `ai_input` is empty string instead of "Initial Input". Snapshot mechanism probably doesn't include `ai_input` field.
 # TODO(Ed): Support "Virtual" Pasted entries for the context.
+
+---
+
+## Phase 9: Chore Tracks
+
+*Initialized: 2026-06-07*
+
+- [x] **Track: Unused Scripts Cleanup** `[checkpoint: 46ce3cd]`
+   *Link: [./tracks/unused_scripts_cleanup_20260607/](./tracks/unused_scripts_cleanup_20260607/), Spec: [./tracks/unused_scripts_cleanup_20260607/spec.md](./tracks/unused_scripts_cleanup_20260607/spec.md), Plan: [./tracks/unused_scripts_cleanup_20260607/plan.md](./tracks/unused_scripts_cleanup_20260607/plan.md)*
+   *Goal: Remove 30 confirmed-unused one-off scripts from `scripts/` (56 → 26 files, 54% reduction). 5 atomic per-category commits; no new CI gate; follow-up `unused_scripts_audit_20260607` recorded. All non-GUI test batches still pass; 2 audit scripts (main_thread_imports, weak_types) report no new violations.*