feat(web-dashboard): complete settings, health, shared data and build integration

- Settings editor with API key masking and conflict detection
- Health dashboard with status cards and one-click fixes
- Home dashboard with stats and quick actions
- Shared data viewer for commands/skills/agents
- Build scripts for UI + server bundle
- Bundle size verification (<500KB gzipped)
- Pre-release checklist script

scripts/verify-bundle.js

@@ -0,0 +1,48 @@
+#!/usr/bin/env node
+
+/**
+ * Verify UI bundle size is under 500KB gzipped
+ */
+
+const fs = require('fs');
+const path = require('path');
+const zlib = require('zlib');
+
+const UI_DIR = path.join(__dirname, '../dist/ui');
+const MAX_SIZE = 500 * 1024; // 500KB
+
+function getGzipSize(filePath) {
+  const content = fs.readFileSync(filePath);
+  return zlib.gzipSync(content).length;
+}
+
+function walkDir(dir) {
+  let totalSize = 0;
+  const files = fs.readdirSync(dir, { withFileTypes: true });
+
+  for (const file of files) {
+    const filePath = path.join(dir, file.name);
+    if (file.isDirectory()) {
+      totalSize += walkDir(filePath);
+    } else {
+      totalSize += getGzipSize(filePath);
+    }
+  }
+
+  return totalSize;
+}
+
+if (!fs.existsSync(UI_DIR)) {
+  console.log('[!] dist/ui not found. Run bun run ui:build first.');
+  process.exit(1);
+}
+
+const totalSize = walkDir(UI_DIR);
+const sizeKB = (totalSize / 1024).toFixed(1);
+
+if (totalSize > MAX_SIZE) {
+  console.log(`[X] Bundle too large: ${sizeKB}KB gzipped (max: 500KB)`);
+  process.exit(1);
+} else {
+  console.log(`[OK] Bundle size: ${sizeKB}KB gzipped`);
+}