feat: 2.14.0 — Eithan terminal toolbar, voice UX, Dross improvements framework

- Terminal renamed Eithan: mobile font A−/A+ (per-URL ttyd opts), same-origin
  xterm Copy/Paste buttons, scroll-to-live, touch-default 17px
- Dross voice: no keyboard pop after transcribe (fine-pointer only focus),
  autogrow textarea to ~5 lines, live amplitude meter on the mic while recording
- Dross improvements: propose_improvement tool (CSS layer, exfil-sanitized,
  owner-approved, per-improvement rollback/restore), public /improvements.css,
  Settings panel. External MCP registry unchanged (no tool leak).

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

lib/api/routes/improvements.js

@@ -0,0 +1,33 @@
+import { Router } from 'express';
+import { asyncWrap } from '../errors.js';
+import { requireOwner } from '../cap.js';
+import * as repo from '../../db/repos/improvements.js';
+import { recordAudit } from '../../db/repos/audit.js';
+
+export const router = Router();
+
+router.get('/', asyncWrap(async (_req, res) => res.json(await repo.list())));
+
+router.get('/:id', asyncWrap(async (req, res) => {
+  const row = await repo.get(req.params.id);
+  if (!row) return res.status(404).json({ error: 'not_found' });
+  res.json(row);
+}));
+
+for (const verb of ['approve', 'rollback', 'restore', 'reject']) {
+  router.post(`/:id/${verb}`, requireOwner, asyncWrap(async (req, res) => {
+    const row = await repo.transition(req.params.id, verb, 'owner');
+    if (!row) return res.status(409).json({ error: 'invalid_transition' });
+    const auditAction = { approve: 'approve', reject: 'reject', rollback: 'update', restore: 'update' }[verb];
+    await recordAudit({ kind: 'user' }, auditAction, 'improvement', row.id, null, { verb, summary: row.summary });
+    res.json(row);
+  }));
+}
+
+// Public stylesheet of ACTIVE improvements. Unauthenticated by design: it carries
+// no secrets (owner-approved, exfil-sanitized CSS only) and <link> can't send a
+// bearer token. Mounted on the app root, outside the /api auth wall.
+export async function cssHandler(_req, res) {
+  res.set({ 'Content-Type': 'text/css; charset=utf-8', 'Cache-Control': 'no-cache' });
+  res.send(await repo.activeCss());
+}