feat(launcher): restore Kill Apps button in Native OS config

Kills the standard conference presentation app set between sessions:
Microsoft PowerPoint, Keynote, Adobe Acrobat Reader DC, VLC, soffice.

- Calls native.kill_processes({ process_name_li }) via existing relay
- Process list overridable per device via event_device.other_json.launcher.kill_process_li
- Button lives in Native OS config > System Actions (edit mode only)
- Reuses system_status for feedback — shows which apps are being killed
- Original list recovered from git history of legacy architecture docs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

documentation/TODO__Agents.md

@@ -9,8 +9,10 @@
   `run_osascript` / `run_cmd` directly with per-step error handling. Complete.
 - [x] **[Launcher] Slide control scripts in Svelte config** — AppleScript post_scripts live in
   `ae_launcher__default_launch_profiles.ts`. VLC focus-stealing fix applied. Complete.
-- [ ] **[Launcher] `kill_processes` target list in config** — Implement UI for manual "Kill Apps"
-  button and auto-cleanup on file open.
+- [x] **[Launcher] Kill Apps button** — "Kill Apps" button added to Native OS config (System
+  Actions, edit mode only). Kills PowerPoint, Keynote, Adobe Acrobat Reader DC, VLC, soffice.
+  List overridable via `event_device.other_json.launcher.kill_process_li`. Auto-cleanup on file
+  open (deferred — manual button sufficient for CMSC).
 - [ ] **[Launcher] End-to-end test on macOS** — test pptx and key opens on a real podium Mac.
 - [ ] **[Launcher/Electron] Wallpaper stops applying after several changes (post-CMSC)** —
   Append timestamp/random suffix to temp filename so macOS always sees a new path.