fix(tauri): stop Windows recall panel from resizing window and leaving a phantom column

[maosuarez]

Problem

On Windows, the embedded AI-assistant (Recall) panel caused two layout issues on the home view that don't occur on macOS (I am a win user):

1. Window resizes when toggling the panel. Opening/closing the panel drives an OS-level window resize (expand → 960px, collapse → 520px) through cmd_apply_recall_window_layout. On macOS this "grow to fit, snap back" is intentional, but on Windows it snaps the window to a fixed 520px on close regardless of the size the user chose, and the timing leaves transient whitespace.

2. Phantom empty column when the panel is collapsed. The top-level .recall-panel { padding: 16px } rule, combined with width: 0 and the global box-sizing: border-box, forces the collapsed panel to render ~32px wide — a permanent empty column on the right edge of the home view. macOS never shows it because the window shrinks below the panel's footprint on collapse.

Fix

Both changes are platform-gated; macOS behavior is byte-for-byte unchanged.

1. Skip the OS window resize on Windows (IS_WINDOWS guard, early-return in applyRecallWindowLayout). The CSS flex layout (.recall-panel width: 0 ↔ expanded, .app-left { flex: 1 }) reflows on its own, so the window stays at whatever size the user set.

2. Zero the padding on the collapsed panel for non-macOS only:

   html:not([data-platform="macos"]) .recall-panel:not(.expanded) { padding: 0; }

   The expanded panel keeps its 16px padding (the terminal needs it).

Linux also benefits from fix #2 (it had the same phantom column); the rule is gated away from macOS, not toward a single platform, and removes a gap that shouldn't exist anywhere.

Scope

• 1 file changed: tauri/src/index.html (+21 lines)
• No Rust changes
• No macOS/Linux regressions — all changes guarded by platform detection

Testing

Verified visually on Windows 11 with cargo tauri dev:

• Toggling the AI assistant panel no longer resizes/snaps the window
• Collapsed panel no longer leaves an empty column on the right
• Expanded panel still renders with correct internal padding

[vercel]

@maosuarez is attempting to deploy a commit to the evil genius laboratory Team on Vercel.

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[silverstein]

Merged, thank you. This is exactly the kind of Windows coverage the project needs most, and the platform gating is clean. I especially appreciate the comments explaining why the macOS resize is intentional and why the collapsed padding only matters off-mac. That context makes this easy to maintain later. Hope to see more from you.