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/db/migrations/030_improvements.sql

@@ -0,0 +1,13 @@
+-- Dross improvements: versioned, owner-gated CSS-layer changes to the Void itself.
+-- Each row is one improvement; rollback/restore is a status flip — instant, reversible.
+CREATE TABLE dross_improvements (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  summary TEXT NOT NULL,
+  css TEXT NOT NULL,
+  status TEXT NOT NULL DEFAULT 'pending'
+    CHECK (status IN ('pending', 'active', 'rolled_back', 'rejected')),
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  decided_at TIMESTAMPTZ,
+  decided_by TEXT
+);
+CREATE INDEX dross_improvements_status ON dross_improvements(status);