fix(desktop): restore panel titlebar interactions

[maria-rcks]

On macOS desktop, the titlebar drag regions swallowed clicks on the panel controls. Moving those controls into the width-animated panel fixed clicks but made the controls disappear and slide in with the panel.

This keeps one viewport-fixed control strip mounted through the full inline-panel transition. Matching no-drag guards inside both titlebar owners keep the strip clickable, while only tabs and the final 112 px control footprint are excluded from dragging.

Verified in the real app with panel animations set to 200 ms. The controls stayed at the same 92 px footprint through open and close at 1280x800 and 1440x900. Maximize/restore, terminal open/close, and right-panel close/reopen all changed state. Web typecheck, focused lint, and formatting also pass.

Implemented with gpt-5.6-sol in T3 Code.

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Note

Low Risk
Desktop UI and Electron drag-region styling only; no auth, data, or API changes.

Overview
Fixes Electron cases where right-panel chrome (maximize, terminal, close) stopped receiving clicks and the tab bar blocked window dragging.

ChatView now keys root-level panelLayoutControls on inline right-panel layout (rightPanelControlsAtRoot) instead of “not in sheet titlebar,” and adds a fixed no-drag spacer in WorkspacePageHeader when those controls live at the root so they don’t sit in the draggable titlebar region.

RightPanelTabs moves [-webkit-app-region:no-drag] from the full tab ScrollArea onto each tab row, adds a matching fixed no-drag spacer for native window controls, and leaves the rest of the tab bar draggable for window moves.

^{Reviewed by Cursor Bugbot for commit 7a9714e. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Fix Electron panel titlebar drag regions and layout control placement

• Moves panelLayoutControls rendering to the chat view root when a non-sheet right panel is present, falling back to WorkspacePageHeader otherwise.
• Adds Electron-only fixed non-draggable overlays over native control areas in ChatView.tsx and RightPanelTabs.tsx.
• Marks individual surface tabs as non-draggable in RightPanelTabs instead of the entire tab-list ScrollArea.
• Behavioral Change: The tab bar scroll area in RightPanelTabs is now window-draggable in Electron inline mode.

^{Macroscope summarized 7a9714e.}

[macroscopeapp]

Approvability

Verdict: Approved at 7a9714e

Macroscope's review found this PR approvable — This is a small, self-contained Electron titlebar interaction fix affecting only panel control placement and drag/click hit-testing. It does not change product defaults, application data behavior, or sensitive paths.

^{You can add or adjust custom eligibility rules. Learn more.}

Dismissing prior approval to re-evaluate 7a9714e