fix(quick-search): Esc from the tray now closes AND returns to the tray

Two bugs in the same flow, both on the tray-originated path.

1. Esc did nothing until the search box was clicked: after the tray restore
   the WebView2 child does not hold the OS keyboard focus, so no keystroke
   reached the page at all — a DOM .focus() cannot fix that. Both quick-search
   entry points now call WebBrowser.SetFocus after restoring.

2. Esc closed the modal but left the app on screen. In fill mode
   closeQuickSearchModal fires cancelAutofill and then minimizeToTray, and two
   back-to-back window.location.href assignments COALESCE — the minimise was
   dropped. The copy path was unaffected because it never calls cancelAutofill,
   which is why this only showed up here. Deferred by a setTimeout(0), the same
   remedy CLAUDE.md already documents for quickunlock/store + pin/clear.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

js/app.overlays.js

@@ -502,7 +502,12 @@ function closeQuickSearchModal(keepClipboard) {
     if (quickSearchHideAfter) {
         quickSearchHideAfter = false;
         if (Bridge.active && typeof Bridge.minimizeToTray === 'function')
-            Bridge.minimizeToTray(!!keepClipboard);
+            // Deferred: in fill mode the cancelAutofill above already fired a
+            // cmd:// navigation, and two back-to-back window.location.href
+            // assignments COALESCE — only one survives, so the minimise was
+            // silently dropped and the app stayed on screen. Same pitfall as
+            // the quickunlock/store + pin/clear pair in doChangeMasterPassword.
+            setTimeout(() => Bridge.minimizeToTray(!!keepClipboard), 0);
     }
 }