实现Agent对话，合格自动提交，不合格补充材料的能力

src/web/static/js/sync.js

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+/**
+ * 移动端同步模块
+ */
+import { App } from './state.js';
+import { ensureSession } from './utils.js';
+import { addFileMessage } from './chat.js';
+import { checkAutoStart, promptMissingConfig } from './config.js';
+
+export async function generateQr() {
+  await ensureSession();
+  const mobileUrl = window.location.origin + '/mobile/' + App.sessionId;
+  const box = document.getElementById('qrcode');
+  box.innerHTML = '';
+  new QRCode(box, {
+    text: mobileUrl,
+    width: 120,
+    height: 120,
+    colorDark: '#333',
+    colorLight: '#fff',
+  });
+}
+
+export async function startSync() {
+  if (App.syncTimer) return;
+  await syncFiles();
+  App.syncTimer = setInterval(syncFiles, 3000);
+}
+
+export function stopSync() {
+  if (App.syncTimer) { clearInterval(App.syncTimer); App.syncTimer = null; }
+}
+
+async function syncFiles() {
+  if (!App.sessionId) return;
+  try {
+    const r = await fetch(`/api/files/${App.sessionId}`);
+    const d = await r.json();
+    const serverFiles = d.files || [];
+    const serverNames = new Set(serverFiles.map(f => f.name));
+    const localNames = new Set(App.allFiles.map(f => f.name));
+    const addedFiles = [];
+
+    for (const serverFile of serverFiles) {
+      if (!localNames.has(serverFile.name)) {
+        const resp = await fetch(`/api/download/${App.sessionId}/${encodeURIComponent(serverFile.name)}`);
+        const blob = await resp.blob();
+        const file = new File([blob], serverFile.name, { type: blob.type });
+        file.__source = 'server';
+        App.allFiles.push(file);
+        addedFiles.push(serverFile.name);
+      }
+    }
+
+    for (const f of [...App.allFiles]) {
+      if (!serverNames.has(f.name) && f.__source !== 'local') {
+        const idx = App.allFiles.indexOf(f);
+        if (idx > -1) App.allFiles.splice(idx, 1);
+      }
+    }
+
+    if (addedFiles.length) {
+      addedFiles.forEach(name => addFileMessage(name));
+      if (App.processState === 'done') {
+        App.processState = 'idle';
+        App.newFilenames = addedFiles;
+      } else if (App.processState === 'awaiting_supplement') {
+        App.processState = 'idle';
+        App.newFilenames = addedFiles;
+      }
+    }
+
+    if (App.allFiles.length) {
+      document.getElementById('file-zone').classList.add('active');
+    } else {
+      document.getElementById('file-zone').classList.remove('active');
+    }
+
+    checkAutoStart();
+  } catch (e) { /* ignore */ }
+}