v0.2 Phase 0+1: planning doc + tooling baseline

Phase 0 — docs/release/v0.2-frontend-overhaul.md as single source of
truth for the v0.2 frontend coherence pass. Records hard rules,
tooling pins, sacred-behaviour contract list, wrapper catalogue,
per-page migration order, verification matrix, KI-05 plan, and the
explicit "DO NOT add Skeleton" line.

Phase 1 — tooling baseline. All exact-pinned per the plan:

- @playwright/test@1.60.0 + playwright@1.60.0 + @axe-core/playwright@4.11.3
- rollup-plugin-visualizer@7.0.1 (wired behind ANALYZE=1)
- @vitest/browser@4.1.6 + @vitest/browser-playwright@4.1.6 (provider)
- vitest-browser-svelte@2.1.1 (runes-aware Svelte 5 bridge)
- cargo-nextest installed globally

New configs: playwright.config.ts (frontend-only, dev:frontend webServer,
900x700 + 1440x900 projects, visual baselines deferred), vitest.browser.config.js
(separate from jsdom suite). New scripts: test:e2e, test:e2e:ui,
test:browser, analyze, test:rust:fast, guard:no-skeleton.

guard-no-skeleton.mjs walks package.json + package-lock + src/ for any
@skeletonlabs reference and exits 1 if found — locks in the no-Skeleton
hard rule for any future agent.

Smoke baseline (tests/e2e/smoke.spec.ts): 16 tests passing across two
viewports — app loads without Tauri runtime, keyboard nav, axe scan
(color-contrast deferred to Phase 7 per docs/release/v0.1-contrast-audit.md),
light/dark theme cycle, all three sensory zones (cave/energy/reset).
10 screenshots emitted to test-results/ as non-failing artefacts.

Surfaced + fixed two browser-preview bugs while landing the baseline:

- src/lib/utils/osInfo.ts: FALLBACK_BROWSER_INFO was evaluated at SSR
  module-load (navigator undefined → os: 'unknown'), and the UA check
  ran before navigator.platform — so Playwright's Windows-UA Chromium
  on a Linux runner detected as Windows, useCustomChrome went true,
  Titlebar mounted and tripped Tauri-only APIs. Now lazy-built per
  call; platform is the primary signal, UA only a fallback.

- src/lib/components/Titlebar.svelte: defensive hasTauriRuntime() guard
  on every handler and the $effect. Titlebar should not crash if any
  future code path mounts it without Tauri.

.gitignore: reports/, .playwright/, test-results/, playwright-report/.

Per-phase gate green: npm run check (0/0), npm test (0/0), npm run
test:e2e (16/16), npm run guard:no-skeleton (clean).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/guard-no-skeleton.mjs

@@ -0,0 +1,67 @@
+#!/usr/bin/env node
+// Fails (exit 1) if any reference to @skeletonlabs appears in package.json,
+// package-lock.json, or anywhere under src/. Prevents a future agent
+// reading "frontend overhaul" from reaching for Skeleton — see
+// docs/release/v0.2-frontend-overhaul.md §16.
+
+import { readFileSync, readdirSync, statSync } from "node:fs";
+import { join, relative } from "node:path";
+
+const ROOT = process.cwd();
+const NEEDLE = "@skeletonlabs";
+const hits = [];
+
+function checkFile(path) {
+  try {
+    const content = readFileSync(path, "utf8");
+    if (content.includes(NEEDLE)) {
+      const rel = relative(ROOT, path);
+      const lines = content.split("\n");
+      for (let i = 0; i < lines.length; i++) {
+        if (lines[i].includes(NEEDLE)) {
+          hits.push(`${rel}:${i + 1}: ${lines[i].trim()}`);
+        }
+      }
+    }
+  } catch {
+    // unreadable -> ignore
+  }
+}
+
+function walk(dir) {
+  let entries;
+  try {
+    entries = readdirSync(dir);
+  } catch {
+    return;
+  }
+  for (const name of entries) {
+    if (name === "node_modules" || name === ".svelte-kit" || name === ".git") continue;
+    const full = join(dir, name);
+    let st;
+    try {
+      st = statSync(full);
+    } catch {
+      continue;
+    }
+    if (st.isDirectory()) {
+      walk(full);
+    } else {
+      checkFile(full);
+    }
+  }
+}
+
+checkFile(join(ROOT, "package.json"));
+checkFile(join(ROOT, "package-lock.json"));
+walk(join(ROOT, "src"));
+
+if (hits.length > 0) {
+  console.error(`guard-no-skeleton: found ${hits.length} reference(s) to ${NEEDLE}:`);
+  for (const h of hits) console.error("  " + h);
+  console.error("\nLumotia v0.2 frontend overhaul forbids Skeleton.");
+  console.error("See docs/release/v0.2-frontend-overhaul.md §16.");
+  process.exit(1);
+}
+
+console.log(`guard-no-skeleton: clean (no ${NEEDLE} references in package.json, package-lock.json, or src/)`);