[Feature]: Align tab close button to the right

[funkeeflow]

Before submitting

• I searched existing issues and did not find a duplicate.

Area

apps/desktop (in-app browser / right-panel tab strip)

Problem or use case

Tab close (×) sits on the left of the tab title. That matches Safari / Chrome-on-macOS, but in T3 it reads as IDE chrome, where close-on-the-right (VS Code, Chrome-on-Windows, Firefox) is the expected target.

Left-aligned close is easy to miss or hit by accident when selecting a tab, and it fights the muscle memory of every other editor-style tab strip.

Proposed solution

Move the close button to the right of the tab title on the in-app browser and other right-panel tabs that share the same control.

Keep hover-to-reveal / active-tab visibility as they are today; this is only a layout change.

Related: not a duplicate of #4146 (adding a panel close control) or #11137 (new-tab selector).

[juliusmarminge]

Thanks for the clear write-up — this is a real layout mismatch, not a duplicate.

What the code does today
The right-panel / in-app browser tab strip is apps/web (shared by desktop), not a desktop-only control.

Close is fused with the left-side identity icon. PanelTabCloseButton (apps/web/src/components/ui/panel-tab-close-button.tsx) wraps the surface icon and swaps it for × on hover/focus. In RightPanelTabs the row is: icon-as-close → optional mute → title.

Same control is also used in ThreadTerminalDrawer for the terminal list.

Not a duplicate of

• [Feature]: Add an explicit close button to the right panel header #4146 / PR Add right panel close controls #4148 — whole-panel close / Mod+W; that work leaves per-tab × alone
• [Bug]: Clicking the new tab button in the right sidebar then clicking the open tab does not close the new tab selector #11137 / PR fix(web): close new tab selector when clicking an open tab #11622 — new-tab selector dismiss

No existing PR already moves tab close to the right of the title.

Suggested change
Treat this as a small enhancement. Target the VS Code-style row: [icon] [title] [× on hover].

A flex reorder alone would put the icon after the title ([title] [icon→×]). Decouple the static surface icon from the close control, then place the existing hover/focus-revealed × after the title. Keep mute as a sibling if present. Optionally apply the same convention in ThreadTerminalDrawer.

Do not change panel-level close or the add-surface menu.

Accepting as a low-priority UI polish. Good first issue.

[funkeeflow]

Implemented in #12062 — icon stays on the left, hover × moves after the title (same treatment in the terminal list).

[alexandre-vl]

Implemented in #18199, written from scratch on current main (replaces #12062).