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/ai/agent/tools/index.js

@@ -3,6 +3,7 @@ import { searchTool } from './search.js';
 import { readTool } from './read.js';
 import { contextTool } from './context.js';
 import { proposeChangeTool } from './propose_change.js';
+import { proposeImprovementTool } from './propose_improvement.js';
 
 // The shared registry. Adding a tool later is a one-line registerTool() call
 // here (see spec §7 — extensible tool registry). A future MCP server can
@@ -12,3 +13,4 @@ companionRegistry.registerTool(searchTool);
 companionRegistry.registerTool(readTool);
 companionRegistry.registerTool(contextTool);
 companionRegistry.registerTool(proposeChangeTool);
+companionRegistry.registerTool(proposeImprovementTool);