feat: enhance CDP bridge management and fix JS falsy returns

- background.js: Add management API, auto-return for JS, refactor new tab capture
- simphtml.py: Fix falsy return value bug, flatten return structure
- agent_loop.py: Simplify UI icons
- manifest.json: Add management permission
- tools_schema: Optimize prompts for web tools
- tmwebdriver_sop.md: Update documentation

assets/tmwd_cdp_bridge/background.js

@@ -32,6 +32,27 @@ async function handleExtMessage(msg, sender) {
       }
     } catch (e) { return { ok: false, error: e.message }; }
   }
+  if (msg.cmd === 'management') {
+    try {
+      if (msg.method === 'list') {
+        const all = await chrome.management.getAll();
+        return { ok: true, data: all.map(e => ({ id: e.id, name: e.name, enabled: e.enabled, type: e.type, version: e.version })) };
+      }
+      if (msg.method === 'reload') {
+        chrome.alarms.create('tmwd-self-reload', { when: Date.now() + 200 });
+        return { ok: true };
+      }
+      if (msg.method === 'disable') {
+        await chrome.management.setEnabled(msg.extId, false);
+        return { ok: true };
+      }
+      if (msg.method === 'enable') {
+        await chrome.management.setEnabled(msg.extId, true);
+        return { ok: true };
+      }
+      return { ok: false, error: 'Unknown method: ' + msg.method };
+    } catch (e) { return { ok: false, error: e.message }; }
+  }
   return { ok: false, error: 'Unknown cmd: ' + msg.cmd };
 }
 
@@ -136,11 +157,12 @@ function buildExecScript(code, errorHandler) {
       const lastLine = lines.length > 0 ? lines[lines.length - 1].trim() : '';
       const AsyncFunction = Object.getPrototypeOf(async function(){}).constructor;
       let r;
+      function _air(c) { const ls = c.split(/\\r?\\n/); let i = ls.length - 1; while (i >= 0 && !ls[i].trim()) i--; if (i < 0) return c; const t = ls[i].trim(); if (/^(return |return;|return$|let |const |var |if |if\\(|for |for\\(|while |while\\(|switch|try |throw |class |function |async |import |export |\\/\\/|})/.test(t)) return c; ls[i] = ls[i].match(/^(\\s*)/)[1] + 'return ' + t; return ls.join('\\n'); }
       if (lastLine.startsWith('return')) {
         r = await (new AsyncFunction(jsCode))();
       } else {
         try { r = eval(jsCode); if (r instanceof Promise) r = await r; } catch (e) {
-          if (e instanceof SyntaxError && (/return/i.test(e.message) || /await/i.test(e.message))) { r = await (new AsyncFunction(jsCode))(); } else throw e;
+          if (e instanceof SyntaxError && (/return/i.test(e.message) || /await/i.test(e.message))) { r = await (new AsyncFunction(_air(jsCode)))(); } else throw e;
         }
       }
       return { ok: true, data: smartProcessResult(r) };
@@ -190,6 +212,10 @@ async function isServerAlive() {
 }
 
 chrome.alarms.onAlarm.addListener(async (alarm) => {
+  if (alarm.name === 'tmwd-self-reload') {
+    chrome.runtime.reload();
+    return;
+  }
   if (alarm.name === 'tmwd-ws-keepalive') {
     // Keepalive: ping to keep SW alive + detect dead connections
     if (ws && ws.readyState === WebSocket.OPEN) {
@@ -220,8 +246,11 @@ async function handleWsExec(data) {
     ws.send(JSON.stringify({ type: 'error', id: data.id, error: 'No tabId provided' }));
     return;
   }
+  // Use onCreated listener to reliably capture new tabs (avoids race condition with query-diff)
+  const newTabIds = new Set();
+  const onCreated = (tab) => { newTabIds.add(tab.id); };
+  chrome.tabs.onCreated.addListener(onCreated);
   try {
-    const tabsBefore = new Set((await chrome.tabs.query({})).map(t => t.id));
     let res;
     try {
       const result = await chrome.scripting.executeScript({
@@ -260,7 +289,14 @@ async function handleWsExec(data) {
         res = { ok: false, error: { name: 'Error', message: 'CDP fallback failed: ' + cdpErr.message, stack: '' } };
       }
     }
-    const newTabs = (await chrome.tabs.query({})).filter(t => !tabsBefore.has(t.id)).map(t => ({id: t.id, url: t.url, title: t.title}));
+    // Grace period for async tab creation (e.g. link click with target=_blank)
+    if (newTabIds.size === 0) await new Promise(r => setTimeout(r, 200));
+    chrome.tabs.onCreated.removeListener(onCreated);
+    // Get full info for captured new tabs
+    const newTabs = [];
+    for (const id of newTabIds) {
+      try { const t = await chrome.tabs.get(id); newTabs.push({id: t.id, url: t.url, title: t.title}); } catch (_) {}
+    }
     if (res?.ok) {
       ws.send(JSON.stringify({ type: 'result', id: data.id, result: res.data, newTabs }));
     } else {
@@ -269,6 +305,8 @@ async function handleWsExec(data) {
     }
   } catch (e) {
     ws.send(JSON.stringify({ type: 'error', id: data.id, error: { name: e.name || 'Error', message: e.message || String(e), stack: e.stack || '' } }));
+  } finally {
+    chrome.tabs.onCreated.removeListener(onCreated);
   }
 }