Right-click context menus on file panels

Native menus (electrobun ContextMenu) on rows and empty panel space. Rows:
Open (dirs navigate; local files open with the default app via Utils.openPath),
Edit, Copy to Other Panel, Rename, Permissions, Copy Path (works for remote
paths too), Reveal in Finder (local, Utils.showItemInFolder), Move to Trash
(local, Utils.moveToTrash — tooltip notes Finder Restore doesn't apply) and
Delete. Empty space / '..': New Folder, New File, Refresh, Reveal in Finder.

Right-click parks the cursor on the row (keeping the selection when clicking
inside it). Local shell actions run bun-side directly; everything else routes
through the existing menuAction channel back to the stored click target.

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

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

@@ -2,11 +2,18 @@ import { Injectable, inject } from '@angular/core';
 import type { FileEntry } from '@shared/types';
 import { DialogsService } from './dialogs.service';
 import { joinPath } from './format';
-import { type PanelState } from './panels.service';
+import { type PanelState, type Side } from './panels.service';
 import { RpcService } from './rpc.service';
 import { SettingsService } from './settings.service';
 import { ToastService } from './toast.service';
 
+/** The row (or empty space) the user last right-clicked; ctx-* actions apply here. */
+export interface MenuTarget {
+  side: Side;
+  panel: PanelState;
+  entry: FileEntry | null;
+}
+
 /**
  * File operations invoked from a panel's toolbar / keyboard. They act on the
  * GIVEN panel: on the selection if there is one, else on the cursor row.
@@ -18,6 +25,28 @@ export class FileActionsService {
   private readonly dialogs = inject(DialogsService);
   private readonly settings = inject(SettingsService);
 
+  menuTarget: MenuTarget | null = null;
+
+  /** Right-click entry point: remember the target and ask bun for a native menu. */
+  async openContextMenu(target: MenuTarget): Promise<void> {
+    this.menuTarget = target;
+    const { panel, entry } = target;
+    await this.rpc.request.showRowMenu({
+      path: entry?.path ?? panel.cwd(),
+      name: entry?.name ?? '',
+      type: entry?.type ?? 'dir',
+      isLocal: panel.sessionId() === 'local',
+      hasEntry: !!entry,
+    });
+  }
+
+  async trash(panel: PanelState, entry: FileEntry): Promise<void> {
+    const res = await this.rpc.request.moveToTrash({ path: entry.path });
+    if (!res.ok) this.toast.error(res.error);
+    else this.toast.info(`Moved "${entry.name}" to Trash`);
+    await panel.refresh();
+  }
+
   /** Selection if non-empty, else the cursor entry. Never the ".." parent row. */
   targets(panel: PanelState): FileEntry[] {
     const selected = panel.selectedEntries();