chore(web): remove frontend code and styles nothing reaches

The frontend JS is outside ESLint and knip, so this pass used an AST scan
(every method, function and top-level constant in src/web/public, counted
against identifiers, strings and index.html) plus a selector scan of both
stylesheets. Each hit was confirmed by text search before it went.

JavaScript
- The ten run<Cli>() one-line wrappers and the quickStart() alias: run()
  has dispatched to _runCliMode(mode) since the launcher consolidation and
  nothing called the wrappers except tests, which now call the launcher.
- The Agent Teams panel code that lost its event listeners in February:
  the team tasks panel, the teammate pane window, rebuildTeammateMap and
  the three maps that nothing filled any more.
- Unreferenced methods: redockSession, refreshOrchestratorStatus,
  toggleSubagentPanel, minimizeSubagentWindow,
  openAllActiveSubagentWindows, pickBetterPath, getTodoIcon, deletePreset,
  closeRunSummary, saveSessionOptions, getAgentParentSessionId,
  _isUltracodeAgentMinimized.
- Six unused constants and a few unused locals (an unused frame-time
  computation in the touch scroll loop among them).

CSS
- 62 classes and one id that no markup, script or test names: the old
  settings-item / settings-section layout, the pre-redesign respawn and
  context-settings rows, the existing-wizard card and others. 116 rules
  and about 770 lines. A dead class inside an :is() list only loses that
  alternative; the rule stays.

Checked in a browser against an isolated instance: no console errors on
desktop or phone, a shell session runs, and 96 screenshots (desktop,
tablet and phone; settings, session options, add case, panels) are
pixel-identical before and after, apart from clock times.

Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>

test/opencode-resize.test.ts

@@ -70,11 +70,9 @@ describe('OpenCode session initial resize', () => {
     // NOT pre-set activeSessionId before calling selectSession. If it did,
     // selectSession would early-return and skip sendResize.
     //
-    // PR B2 consolidated runOpenCode() (and 7 siblings) into one shared
-    // _runCliMode(mode) — runOpenCode is now a one-line wrapper
-    // (`return this._runCliMode('opencode')`), so inspecting ITS source would
-    // never see the real launch logic and this check would pass vacuously
-    // regardless of what _runCliMode actually does. Inspect _runCliMode itself.
+    // PR B2 consolidated the per-CLI launchers into one shared
+    // _runCliMode(mode), so that is where the real launch logic lives and
+    // what this check inspects.
     ({ context, page } = await freshPage());
     await navigateAndWait(page);
 
@@ -151,7 +149,7 @@ describe('OpenCode session initial resize', () => {
 
     expect(sessionId).toBeTruthy();
 
-    // Call selectSession (which is what runOpenCode does after fix)
+    // Call selectSession (which is what the opencode launch does after fix)
     await page.evaluate(async (sid: string) => {
       const app = (window as unknown as { app: { selectSession: (id: string) => Promise<void> } }).app;
       await app.selectSession(sid);