Windows compatibility pass (beta target)

External editor via cmd/start + exe picker; Permissions hidden for
Windows-local (chmod only flips read-only there); Explorer/Recycle Bin
wording; Ctrl vs Cmd shortcut labels; separator-aware path joins +
drive-root detection; drives list in the panel source picker; icon.ico
+ colored tray icon; icacls ACL on connections.json; README Windows
(beta) section with upstream known issues and a smoke-test checklist.
Runtime paths pending first boot on a real Windows machine.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

ui/src/app/file-actions.service.ts

@@ -3,6 +3,7 @@ import type { FileEntry } from '@shared/types';
 import { DialogsService } from './dialogs.service';
 import { joinPath } from './format';
 import { type PanelState, type Side } from './panels.service';
+import { IS_WINDOWS } from './platform';
 import { RpcService } from './rpc.service';
 import { SettingsService } from './settings.service';
 import { ToastService } from './toast.service';
@@ -157,6 +158,8 @@ export class FileActionsService {
   }
 
   chmod(panel: PanelState): void {
+    // Windows local chmod only flips the read-only bit — don't pretend
+    if (IS_WINDOWS && panel.sessionId() === 'local') return;
     const targets = this.targets(panel);
     if (!targets.length) return;
     this.dialogs.chmod.set({