feat(ext/popup): open setup via chrome.tabs.create, drop setup view from popup

The popup is too constrained for multi-step setup (Chrome closes it when
focus shifts to a file picker). Previously the popup rendered a pass-through
setup-wizard component that itself opened setup.html in a tab. Cut the
middleman: if not configured, directly chrome.tabs.create the setup page
and window.close() the popup.

- Remove 'setup' from the View union and the setup case from render().
- Delete setup-wizard component entirely — setup.html is the canonical flow.
- Drop renderSetupWizard import.

The @ts-nocheck stays on popup.ts until Slice 6 (item-* rewrites).

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

extension/src/popup/popup.ts

@@ -10,7 +10,6 @@ import { renderUnlock } from './components/unlock';
 import { renderEntryList } from './components/entry-list';
 import { renderEntryDetail } from './components/entry-detail';
 import { renderEntryForm } from './components/entry-form';
-import { renderSetupWizard } from './components/setup-wizard';
 import { renderSettings } from './components/settings';
 
 // --- Escape HTML to prevent XSS ---
@@ -22,7 +21,7 @@ export function escapeHtml(str: string): string {
 
 // --- State ---
 
-export type View = 'setup' | 'locked' | 'list' | 'detail' | 'add' | 'edit' | 'settings';
+export type View = 'locked' | 'list' | 'detail' | 'add' | 'edit' | 'settings';
 
 export interface PopupState {
   view: View;
@@ -80,9 +79,6 @@ function render(): void {
   if (!app) return;
 
   switch (currentState.view) {
-    case 'setup':
-      renderSetupWizard(app);
-      break;
     case 'locked':
       renderUnlock(app);
       break;
@@ -112,7 +108,8 @@ async function init(): Promise<void> {
   if (setupResp.ok) {
     const data = setupResp.data as { isConfigured: boolean };
     if (!data.isConfigured) {
-      navigate('setup');
+      await chrome.tabs.create({ url: chrome.runtime.getURL('setup.html') });
+      window.close();
       return;
     }
   }