테마 글로우 설정의 실시간 반영 누락 수정

- 런처가 SettingsChanged 이벤트를 직접 받아 테두리, 아이콘 애니메이션, 무지개 글로우, 선택 글로우를 즉시 다시 적용하도록 보강함

- AX Agent는 저장된 설정을 다시 읽을 때 스트리밍 중 입력창 글로우 설정도 즉시 반영하도록 RefreshFromSavedSettings 흐름을 정리함

- README와 DEVELOPMENT 문서를 2026-04-06 19:02 (KST) 기준으로 갱신하고 Release 빌드에서 경고 0 / 오류 0을 확인함

docs/DEVELOPMENT.md

@@ -3,6 +3,7 @@
 - Document update: 2026-04-06 18:46 (KST) - Tightened launcher indexing for real-world projects by ignoring `.git`, `.vs`, `node_modules`, `bin`, `obj`, `dist`, `packages`, `venv`, `__pycache__`, and `target` directories during both watcher handling and full scans. The launcher now skips noisy build/cache trees instead of reacting to them like searchable content.
 - Document update: 2026-04-06 18:46 (KST) - Replaced the launcher's recursive `EnumerateFiles(..., AllDirectories)` walk with an ignore-aware manual traversal so large repos avoid descending into dependency and build folders, and slowed the rainbow glow timer from `20ms` to `40ms`.
 - Document update: 2026-04-06 18:46 (KST) - Added a deferred responsive-layout timer to `ChatWindow` so AX Agent no longer calls `RenderMessages()` on every `SizeChanged` event. Resizing and layout changes are now coalesced into a single update after a short delay, reducing the heavy-window feel during agent-window manipulation.
+- Document update: 2026-04-06 19:02 (KST) - Fixed theme glow settings so they apply to already-open windows instead of only affecting the next open. `LauncherWindow` now listens to `SettingsChanged` and reapplies border, icon animation, rainbow glow, and selection glow immediately, while `ChatWindow.RefreshFromSavedSettings()` now re-evaluates chat rainbow glow during active streaming.
 - Document update: 2026-04-06 15:31 (KST) - Removed the visible outer border from the Cowork/Code footer permission selector so it reads as a flatter inline action in the bottom work bar.
 - Document update: 2026-04-06 15:26 (KST) - Reworked bottom guidance copy for Chat/Cowork/Code around the actual AX Agent behavior. Input watermark text now comes from a shared helper that considers the active tab and whether a work folder is selected, instead of using overly broad static text.
 - Document update: 2026-04-06 15:26 (KST) - Adjusted the selected preset guide so it prefers concise preset descriptions over raw placeholder prompts, keeping the footer guide and the composer watermark in distinct roles.