fix(bridge): stall-based approval detection + known issues from deep debugging

- IDLE→stall detection: RUNNING+delta=0 for 6 polls (30s)
- lastModifiedTime-based thinking filter (partial)
- ResolveOutstandingSteps confirmed CANCELS steps (removed)
- HandleCascadeUserInteraction always socket hang up (removed)
- VS Code accept commands: silent success, no effect
- Hybrid approval: focus+all commands sequential, no break
- logToFile: console.log backup added
- Known issues: 4 critical findings documented
- better-antigravity reference added for future research

better-antigravity-main/build.mjs

@@ -0,0 +1,57 @@
+import * as esbuild from 'esbuild';
+import * as fs from 'fs';
+import * as path from 'path';
+
+const isWatch = process.argv.includes('--watch');
+
+/** @type {esbuild.BuildOptions} */
+const config = {
+    entryPoints: ['src/extension.ts'],
+    bundle: true,
+    outfile: 'dist/extension.js',
+    external: ['vscode'],
+    format: 'cjs',
+    platform: 'node',
+    target: 'es2020',
+    sourcemap: true,
+    minify: false,
+    // Resolve antigravity-sdk from monorepo sibling
+    alias: {
+        'antigravity-sdk': path.resolve('..', 'antigravity-sdk', 'dist', 'index.js'),
+    },
+};
+
+// Ensure dist/ exists
+if (!fs.existsSync('dist')) fs.mkdirSync('dist');
+
+// Copy sql-wasm.wasm AND sql-wasm.js to dist/ (required by antigravity-sdk's StateBridge)
+const sqlFiles = ['sql-wasm.wasm', 'sql-wasm.js'];
+for (const sqlFile of sqlFiles) {
+    const searchPaths = [
+        path.join('node_modules', 'sql.js', 'dist', sqlFile),
+        path.join('..', 'antigravity-sdk', 'node_modules', 'sql.js', 'dist', sqlFile),
+    ];
+
+    let copied = false;
+    for (const src of searchPaths) {
+        if (fs.existsSync(src)) {
+            fs.copyFileSync(src, path.join('dist', sqlFile));
+            console.log(`Copied ${sqlFile} from ${src}`);
+            copied = true;
+            break;
+        }
+    }
+    if (!copied) {
+        console.error(`ERROR: ${sqlFile} not found. Run "npm install" first.`);
+        process.exit(1);
+    }
+}
+
+if (isWatch) {
+    const ctx = await esbuild.context(config);
+    await ctx.watch();
+    console.log('Watching...');
+} else {
+    await esbuild.build(config);
+    console.log('Build complete');
+}