Scaffold CommiTea: yarn workspaces, Electron shell, core label schema, design system

- apps/desktop: electron-vite + React + Tailwind mapped onto design tokens
  (preflight off; tokens/base.css owns the reset); boots to a Reginald
  placeholder proving fonts/tokens/core wiring
- packages/core: pure TS; gitea label schema (est/*, p/*, deadline/hard)
  with pessimistic conflict resolution + 15 unit tests
- docs/design: full design handoff (tokens, 16 component contracts,
  interactive 14-screen prototype, Reginald voice rules)
- docs/PLAN.md: product plan (purity rule, pm-state repo, deterministic
  scheduler + Monte Carlo, directive log)
- Deliberate deviation from novelpad stack: no ElectricSQL/PGlite — local
  store is a rebuildable cache over gitea REST/webhooks (better-sqlite3
  in main process, arriving in P1)

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

docs/design/components/feedback/Tooltip.js.txt

@@ -0,0 +1,43 @@
+import React from 'react';
+
+const CSS = `
+.ct-tooltip-wrap { position: relative; display: inline-flex; }
+.ct-tooltip {
+  position: absolute; bottom: calc(100% + 7px); left: 50%;
+  transform: translateX(-50%) translateY(2px);
+  background: var(--ink-1);
+  color: var(--ink-inverse);
+  font: 500 12px/1.4 var(--font-sans);
+  padding: 5px 9px;
+  border-radius: var(--radius-1);
+  white-space: nowrap;
+  pointer-events: none;
+  opacity: 0;
+  transition: opacity var(--duration-fast) var(--ease-out), transform var(--duration-fast) var(--ease-out);
+  z-index: 50;
+}
+.ct-tooltip--bottom { bottom: auto; top: calc(100% + 7px); transform: translateX(-50%) translateY(-2px); }
+.ct-tooltip-wrap:hover .ct-tooltip,
+.ct-tooltip-wrap:focus-within .ct-tooltip {
+  opacity: 1;
+  transform: translateX(-50%) translateY(0);
+}
+.ct-tooltip code { font: 500 11px var(--font-mono); }
+`;
+(function inject() {
+  if (typeof document !== 'undefined' && !document.getElementById('ct-tooltip-css')) {
+    const s = document.createElement('style'); s.id = 'ct-tooltip-css'; s.textContent = CSS;
+    document.head.appendChild(s);
+  }
+})();
+
+export function Tooltip({ content, side = 'top', children, style }) {
+  return (
+    <span className="ct-tooltip-wrap" style={style}>
+      {children}
+      <span className={`ct-tooltip${side === 'bottom' ? ' ct-tooltip--bottom' : ''}`} role="tooltip">
+        {content}
+      </span>
+    </span>
+  );
+}