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/colors.css

@@ -0,0 +1,137 @@
+/* CommiTea color system — "Green tea service"
+   Cool porcelain surfaces, slate-green ink, jade accent (from the cup itself).
+   Light is default (morning service). Dark scope: [data-theme="dark"] (evening service). */
+
+:root {
+  /* ---- base: porcelain (cool green-white surfaces) ---- */
+  --paper-0: #F0F4F0;   /* app background */
+  --paper-1: #FAFCF9;   /* raised card */
+  --paper-2: #E4EBE4;   /* inset wells, rails */
+  --paper-3: #D7E1D8;   /* pressed / deep inset */
+
+  /* ---- base: ink (slate-green text scale) ---- */
+  --ink-1: #1D2522;     /* primary text */
+  --ink-2: #51605A;     /* secondary text */
+  --ink-3: #84928B;     /* muted / placeholder */
+  --ink-inverse: #EFF5F0;
+
+  /* ---- base: lines ---- */
+  --line-1: #D7DFD7;    /* hairline */
+  --line-2: #BACBBE;    /* strong rule */
+
+  /* ---- base: spruce (brand green — the logo's slate-teal) ---- */
+  --spruce-9: #16322A;
+  --spruce-8: #1D4238;
+  --spruce-7: #275546;  /* brand anchor */
+  --spruce-6: #3A7260;
+  --spruce-5: #57937C;
+  --spruce-3: #A3CFBB;
+  --spruce-2: #CDE5D7;
+  --spruce-1: #E3F0E8;
+
+  /* ---- base: jade (mint accent — the tea itself) ---- */
+  --jade-7: #2E7A57;
+  --jade-6: #46996F;
+  --jade-5: #66B389;
+  --jade-3: #A8DDBE;
+  --jade-1: #E0F4E7;
+
+  /* ---- semantic: surfaces & text ---- */
+  --surface-app: var(--paper-0);
+  --surface-card: var(--paper-1);
+  --surface-inset: var(--paper-2);
+  --surface-raised: var(--paper-1);
+  --text-body: var(--ink-1);
+  --text-secondary: var(--ink-2);
+  --text-muted: var(--ink-3);
+  --text-on-accent: var(--ink-inverse);
+  --border-hairline: var(--line-1);
+  --border-strong: var(--line-2);
+
+  /* ---- semantic: interactive ---- */
+  --accent: var(--spruce-7);
+  --accent-hover: #1F4A3C;
+  --accent-pressed: #173B30;
+  --accent-tint: var(--spruce-1);
+  --accent-text: var(--spruce-7);
+  --jade: var(--jade-6);
+  --jade-tint: var(--jade-1);
+  --focus-ring: #57937C;
+
+  /* ---- semantic: status ---- */
+  --ok: #2F7D53;
+  --ok-tint: #DFEEE3;
+  --warn: #96772A;
+  --warn-tint: #EFE9D2;
+  --danger: #A84632;
+  --danger-tint: #F2E0DA;
+  --info: #43758F;
+  --info-tint: #DFE9EC;
+
+  /* ---- domain: label chips (gitea label sets) ---- */
+  --label-est-bg: var(--paper-2);
+  --label-est-text: var(--ink-2);
+  --label-p1: #A84632;
+  --label-p2: #96772A;
+  --label-p3: #43758F;
+  --label-p4: #84928B;
+  --label-hard: #A84632;
+
+  /* ---- domain: forecast ---- */
+  --cone-fill: rgba(102, 179, 137, 0.18);
+  --cone-line: #46996F;
+  --cone-actual: var(--ink-1);
+}
+
+[data-theme="dark"] {
+  /* evening service */
+  --paper-0: #121C18;
+  --paper-1: #182420;
+  --paper-2: #1F2E28;
+  --paper-3: #283A32;
+
+  --ink-1: #E4EEE7;
+  --ink-2: #9FB2A8;
+  --ink-3: #66796F;
+  --ink-inverse: #EFF5F0;
+
+  --line-1: #263630;
+  --line-2: #35493F;
+
+  --spruce-1: #1E332B;
+  --spruce-2: #27443A;
+  --spruce-3: #3A6353;
+
+  --jade-1: #1F3A2E;
+  --jade-3: #35624A;
+
+  --accent: #3A7260;
+  --accent-hover: #448069;
+  --accent-pressed: #315F51;
+  --accent-tint: #1E332B;
+  --accent-text: #8CC7AC;
+  --jade: #6FC694;
+  --jade-tint: #1F3A2E;
+  --focus-ring: #57937C;
+
+  --ok: #74B992;
+  --ok-tint: #1F3529;
+  --warn: #C0A45B;
+  --warn-tint: #33301F;
+  --danger: #C77B62;
+  --danger-tint: #392823;
+  --info: #7FA6BC;
+  --info-tint: #223038;
+
+  --label-est-bg: var(--paper-3);
+  --label-est-text: var(--ink-2);
+  --label-p1: #C77B62;
+  --label-p2: #C0A45B;
+  --label-p3: #7FA6BC;
+  --label-p4: #66796F;
+  --label-hard: #C77B62;
+
+  --cone-fill: rgba(111, 198, 148, 0.14);
+  --cone-line: #6FC694;
+  --cone-actual: #E4EEE7;
+}