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>

apps/desktop/tailwind.config.js

@@ -0,0 +1,67 @@
+/**
+ * Tailwind maps onto the design-token custom properties (src/renderer/src/design/tokens/)
+ * and never redefines their values. Preflight is off — tokens/base.css owns the reset.
+ * @type {import('tailwindcss').Config}
+ */
+export default {
+  content: ['./src/renderer/index.html', './src/renderer/src/**/*.{ts,tsx}'],
+  corePlugins: { preflight: false },
+  theme: {
+    extend: {
+      colors: {
+        paper: {
+          0: 'var(--paper-0)',
+          1: 'var(--paper-1)',
+          2: 'var(--paper-2)',
+          3: 'var(--paper-3)',
+        },
+        ink: {
+          1: 'var(--ink-1)',
+          2: 'var(--ink-2)',
+          3: 'var(--ink-3)',
+          inverse: 'var(--ink-inverse)',
+        },
+        line: {
+          1: 'var(--line-1)',
+          2: 'var(--line-2)',
+        },
+        accent: {
+          DEFAULT: 'var(--accent)',
+          hover: 'var(--accent-hover)',
+          pressed: 'var(--accent-pressed)',
+          tint: 'var(--accent-tint)',
+          text: 'var(--accent-text)',
+        },
+        jade: {
+          DEFAULT: 'var(--jade)',
+          tint: 'var(--jade-tint)',
+        },
+        ok: { DEFAULT: 'var(--ok)', tint: 'var(--ok-tint)' },
+        warn: { DEFAULT: 'var(--warn)', tint: 'var(--warn-tint)' },
+        danger: { DEFAULT: 'var(--danger)', tint: 'var(--danger-tint)' },
+        info: { DEFAULT: 'var(--info)', tint: 'var(--info-tint)' },
+      },
+      fontFamily: {
+        display: ['Libre Caslon Display', 'serif'],
+        agent: ['Libre Caslon Text', 'serif'],
+        sans: ['Instrument Sans', 'system-ui', 'sans-serif'],
+        mono: ['IBM Plex Mono', 'ui-monospace', 'monospace'],
+      },
+      borderRadius: {
+        1: 'var(--radius-1)',
+        2: 'var(--radius-2)',
+        3: 'var(--radius-3)',
+      },
+      boxShadow: {
+        1: 'var(--shadow-1)',
+        2: 'var(--shadow-2)',
+        3: 'var(--shadow-3)',
+        'jade-line': 'var(--shadow-jade-line)',
+      },
+      transitionTimingFunction: {
+        out: 'var(--ease-out)',
+      },
+    },
+  },
+  plugins: [],
+}