refactor(ext/popup): update import paths after generator-popover → generator-panel rename

Update all import statements to reference the new generator-panel module name.
- generator-panel.test.ts: update internal import
- settings-vault.test.ts: update mock import
- settings-vault.ts: update import
- types/login.ts: update import

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extension/src/popup/components/settings-vault.ts

@@ -6,7 +6,7 @@ import { getState, setState, sendMessage, navigate, escapeHtml } from '../popup'
 import type {
   VaultSettings, TrashRetention, HistoryRetention, GeneratorRequest,
 } from '../../shared/types';
-import { openGeneratorPopover } from './generator-popover';
+import { openGeneratorPopover } from './generator-panel';
 
 let pendingSettings: VaultSettings | null = null;
 let activeKeyHandler: ((e: KeyboardEvent) => void) | null = null;