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/tokens/typography.css

@@ -0,0 +1,34 @@
+/* CommiTea typography tokens.
+   Voices: Display serif (headlines, big numerals) · Reginald's voice (Caslon Text, upright)
+   · Body sans (UI) · Mono (data: labels, estimates, dates, ids). */
+
+:root {
+  --font-serif-display: 'Libre Caslon Display', 'Libre Caslon Text', Georgia, serif;
+  --font-serif-text: 'Libre Caslon Text', Georgia, serif;
+  --font-sans: 'Instrument Sans', -apple-system, 'Segoe UI', sans-serif;
+  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;
+
+  /* type scale */
+  --text-hero: 400 48px/1.08 var(--font-serif-display);      /* big forecast numerals */
+  --text-display: 400 34px/1.15 var(--font-serif-display);   /* page titles */
+  --text-title: 400 24px/1.2 var(--font-serif-display);      /* card titles */
+  --text-agent: 400 16px/1.55 var(--font-serif-text);       /* Reginald speaks — serif, upright */
+  --text-agent-lg: 400 20px/1.5 var(--font-serif-text);
+  --text-body: 400 14px/1.5 var(--font-sans);
+  --text-body-strong: 600 14px/1.5 var(--font-sans);
+  --text-small: 400 13px/1.45 var(--font-sans);
+  --text-caption: 400 12px/1.4 var(--font-sans);
+  --text-data: 400 13px/1.4 var(--font-mono);                /* dates, counts */
+  --text-label: 500 11.5px/1 var(--font-mono);               /* chips: est/2d, p/1 */
+  --text-overline: 600 11px/1.2 var(--font-sans);            /* + letter-spacing-wide */
+
+  /* tracking */
+  --letter-spacing-wide: 0.08em;   /* overlines, uppercase */
+  --letter-spacing-label: 0.02em;  /* mono chips */
+
+  /* weights (sans is variable 400–700) */
+  --weight-regular: 400;
+  --weight-medium: 500;
+  --weight-semibold: 600;
+  --weight-bold: 700;
+}