AX Agent 상단 탭 세로 정렬 미세 조정

- 상단 세그먼트 탭 버튼의 세로 콘텐츠 정렬을 중앙 기준으로 다시 맞춤
- 탭 버튼과 래퍼의 패딩 및 높이를 소폭 줄여 위아래 여백 균형 보정
- README와 DEVELOPMENT 문서에 탭 정렬 보정 이력 추가
- 검증: dotnet build src/AxCopilot/AxCopilot.csproj -c Release -v minimal -p:OutputPath=bin\verify\ -p:IntermediateOutputPath=obj\verify\ (경고 0, 오류 0)

docs/DEVELOPMENT.md

@@ -1,5 +1,6 @@
 # AX Copilot - 媛쒕컻 臾몄꽌
 
+- Document update: 2026-04-06 19:56 (KST) - Fine-tuned the AX Agent top tab vertical centering. The shared TopTabBtn style now uses explicit centered content alignment plus slightly reduced wrapper/button padding and height so 채팅 / Cowork / 코드 sit more evenly within the segmented control.
 - Document update: 2026-04-06 19:46 (KST) - Renamed the AX Agent `Claw` preset label to `Claude` while keeping `claw` as a backward-compatible stored value alias. New settings default to `claude`, and old saved values are normalized on load.
 - Document update: 2026-04-06 19:46 (KST) - Re-tuned theme palettes against real-world references: `AgentClawDark/Light/System` now follow Claude-like warm neutrals more closely, `AgentCodexDark` now matches the neutral charcoal reference more closely, `AgentNordLight/Dark/System` use the official Nord palette values, and `AgentSlateLight/Dark/System` were normalized toward a more canonical slate UI range.
 - Document update: 2026-04-06 19:33 (KST) - Rebalanced AX Agent light theme hierarchy so the UI no longer feels visually inverted. `AgentCodexLight`, `AgentCodexSystem`, and `AgentClawLight` now use warmer launcher backgrounds, softer selected/hover states, and slightly lower-contrast borders to separate sidebar and content surfaces more like the `claw-code` reference.
@@ -5014,3 +5015,4 @@ ow + toggle ?쒓컖 ?몄뼱濡??ㅼ떆 ?뺣젹?덈떎.
 - Document update: 2026-04-06 18:24 (KST) - `App.xaml.cs` now restores eager cache availability by calling `LoadCachedIndex()` and `StartWatchers()` at startup, while keeping the heavier full scan on the existing `EnsureIndexWarmupStarted()` path. This keeps the launcher responsive from the first open without reintroducing continuous full rescans as idle background work.
 - Document update: 2026-04-06 18:34 (KST) - Reduced the per-keystroke hot-path cost of the global keyboard hook. `InputListener.cs` now performs the suppressed-foreground-window check only when the current key could actually trigger the launcher hotkey, the capture hotkey, or a registered key filter, instead of doing the window-class lookup on every keydown.
 - Document update: 2026-04-06 18:34 (KST) - `SnippetExpander.cs` now short-circuits immediately for normal typing unless snippet tracking is already active or the current key is the `;` trigger. This removes repeated `GetAsyncKeyState` and buffer logic from ordinary typing in other apps and makes the low-level hook substantially lighter under continuous input.
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