fix(hud): put the bar back where it was dropped once a popover closes

[EtienneLescot]

Summary

When a popover closes, the HUD bar goes back to where the user dropped it.

• Cause. A popover opening near the top of the screen sends its stack rect (hud-overlay-content), and reclampHud pushes the window down until the popover fits. Every later re-clamp started from that pushed window. When the popover closed, the bar was already on screen, so nothing moved it back. Each taller popover pushed it further: 200 → 268 → 380 in the report.
• Fix. The main process keeps the bar's home: its bottom-centre on screen, set by a drag and by the first resize. Re-clamps and resizes place the window from home, through hudResizeBounds's new anchor input. A popover still pushes the bar while it is open, and closing it brings the bar back.
• hudBarAnchor gives the bar's bottom-centre from any stack rect. The stack is centred and bottom-anchored on the bar, so an open popover does not change that point.
• Display changes and restore-from-minimized now place from home too. A bar pushed by a shrinking work area returns once the space is back. Linux, which clamps the whole window, keeps doing that, now from home.

Candidate for cherry-pick to release/v2.1.0.

Related issue

Fixes #1136

Type of change

• Bug fix
• Feature
• Enhancement
• Documentation
• Refactor / maintenance
• Performance
• Security

Release impact

• Patch
• Minor
• Major / breaking change
• No release note needed

Desktop impact

• Windows
• macOS
• Linux
• Installer / packaging
• Not platform-specific

Screenshots / video

None. Nothing was run against a real window: the change is placement math, tested headless. A human check is below.

Testing

• electron/hudWindowBounds.test.ts: the report's sequence. The bar is dropped with its top at y 200. The language menu (320 px) pushes it down and closing the menu brings it back to 200. Device settings (470 px) pushes from home and returns there. A bar with room above it does not move.
• npx tsc --noEmit, npx tsc -p tsconfig.test.json --noEmit and Biome pass.

To check by hand (Windows and macOS)

1. Drag the horizontal bar near the top of the screen, with its top about 200 px from the edge.
2. Open the language menu: the bar may move down so the menu fits. Close it: the bar returns to where you dropped it.
3. Same with Device settings (the gear), the taller panel. Then open and close both several times: the bar must not walk down.
4. With the bar at the bottom of the screen, open both popovers: the bar must not move at all.
5. Flip to the vertical tray and back near the top: the bar keeps its place.
6. Optional: drag the bar to the top, change the taskbar or display scale, then revert: the bar comes back to where it was.

🤖 Generated with Claude Code

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📥 Commits

Reviewing files that changed from the base of the PR and between 9c55596 and 10f049c.

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📒 Files selected for processing (3)

• electron/hudWindowBounds.test.ts
• electron/hudWindowBounds.ts
• electron/windows.ts

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• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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