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/components/setup-wizard.ts

@@ -1,31 +0,0 @@
-/// Setup prompt — directs users to the full-page setup wizard.
-///
-/// The popup is too constrained for file pickers and multi-step forms
-/// (Chrome closes it when focus shifts). All real setup happens in
-/// setup.html, which pushes config to chrome.storage.local when done.
-
-import { escapeHtml } from '../popup';
-
-export function renderSetupWizard(app: HTMLElement): void {
-  app.innerHTML = `
-    <div class="pad" style="padding-top:24px;text-align:center;">
-      <img class="brand-logo" src="icons/relicario-logo.svg" alt="">
-      <div class="brand" style="font-size:16px;margin-bottom:4px;">relicario</div>
-      <p class="secondary" style="margin-bottom:20px;">two-factor vault</p>
-
-      <p class="muted" style="margin-bottom:16px;font-size:11px;line-height:1.6;">
-        No vault configured yet. Open the setup wizard to
-        create a new vault or connect to an existing one.
-      </p>
-
-      <button class="btn btn-primary" id="open-setup-btn" style="width:100%;">
-        open setup wizard
-      </button>
-    </div>
-  `;
-
-  document.getElementById('open-setup-btn')?.addEventListener('click', () => {
-    chrome.tabs.create({ url: chrome.runtime.getURL('setup.html') });
-    window.close();
-  });
-}