Add smart ACK provider for WeChat MP replies

Replace fixed ackText with a rule-based AckProvider that picks
response templates by message type and intent (translate, summary,
rewrite, poster, ppt, mindmap, code, search, schedule). Pure sync,
zero I/O, auto-falls back to config.ackText on any error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

session-reconcile.mjs

@@ -88,6 +88,7 @@ export async function reconcileAgentSession(
   if (sessionPolicy?.unrestricted) return;
 
   const session = await readJson(await apiFetch(`/sessions/${sessionId}`));
+  let needsRestart = false;
   if (workingDir && !samePath(session?.working_dir, workingDir)) {
     try {
       await readJson(
@@ -108,7 +109,7 @@ export async function reconcileAgentSession(
     }
   }
 
-  if (sessionPolicy?.gooseMode) {
+  if (sessionPolicy?.gooseMode && session?.goose_mode !== sessionPolicy.gooseMode) {
     await readJson(
       await apiFetch('/agent/update_session', {
         method: 'POST',
@@ -118,12 +119,14 @@ export async function reconcileAgentSession(
         }),
       }),
     );
+    needsRestart = true;
   }
 
   const desired = sessionPolicy?.extensionOverrides ?? [];
   const allowed = allowedExtensionNames(desired);
   const currentPayload = await readJson(await apiFetch(`/sessions/${sessionId}/extensions`));
   const current = currentPayload?.extensions ?? [];
+  let removedAny = false;
 
   for (const ext of current) {
     const name = extensionName(ext);
@@ -134,10 +137,12 @@ export async function reconcileAgentSession(
         body: JSON.stringify({ session_id: sessionId, name }),
       }),
     );
+    removedAny = true;
   }
 
-  const refreshedPayload = await readJson(await apiFetch(`/sessions/${sessionId}/extensions`));
-  const refreshed = refreshedPayload?.extensions ?? [];
+  const refreshed = removedAny
+    ? ((await readJson(await apiFetch(`/sessions/${sessionId}/extensions`)))?.extensions ?? [])
+    : current;
   const { toRemove, toAdd } = extensionsNeedingRefresh(refreshed, desired);
 
   for (const name of toRemove) {
@@ -147,6 +152,7 @@ export async function reconcileAgentSession(
         body: JSON.stringify({ session_id: sessionId, name }),
       }),
     );
+    needsRestart = true;
   }
 
   for (const config of toAdd) {
@@ -156,14 +162,17 @@ export async function reconcileAgentSession(
         body: JSON.stringify({ session_id: sessionId, config }),
       }),
     );
+    needsRestart = true;
   }
 
-  await readJson(
-    await apiFetch('/agent/restart', {
-      method: 'POST',
-      body: JSON.stringify({ session_id: sessionId }),
-    }),
-  );
+  if (needsRestart) {
+    await readJson(
+      await apiFetch('/agent/restart', {
+        method: 'POST',
+        body: JSON.stringify({ session_id: sessionId }),
+      }),
+    );
+  }
 
   const sandboxText = sandboxConstraints?.trim()
     ? buildSandboxSessionConstraints({