diff --git a/agent-run-gateway.mjs b/agent-run-gateway.mjs
index ccce195..11f48b0 100644
--- a/agent-run-gateway.mjs
+++ b/agent-run-gateway.mjs
@@ -1,6 +1,7 @@
 import crypto from 'node:crypto';
 import fs from 'node:fs/promises';
 import path from 'node:path';
+import { isDirectChatSessionId } from './direct-chat-service.mjs';
 
 const DEFAULT_RUN_RETRY_DELAYS_MS = [1500, 5000, 15000];
 const TERMINAL_STATUSES = new Set(['succeeded', 'failed']);
@@ -209,6 +210,7 @@ export function createAgentRunGateway({
   userAuth,
   tkmindProxy,
   toolGateway = null,
+  directChatService = null,
   retryDelaysMs = DEFAULT_RUN_RETRY_DELAYS_MS,
   autoDispatch = envFlag(process.env.MEMIND_AGENT_RUN_AUTODISPATCH, true),
   maxConcurrentRuns = positiveInteger(
@@ -384,6 +386,35 @@ export function createAgentRunGateway({
     const userMessage = safeJsonParse(row.user_message_json, {});
     const runOptions = getRunOptionsFromMessage(userMessage);
     const toolGatewayStatus = toolGateway?.getStatus ? toolGateway.getStatus() : null;
+    if (directChatService?.canHandle?.({
+      sessionId: row.agent_session_id ?? null,
+      toolMode: runOptions.toolMode,
+      userMessage,
+    })) {
+      try {
+        const result = await directChatService.run({
+          userId: row.user_id,
+          sessionId: row.agent_session_id ?? null,
+          requestId: row.request_id,
+          userMessage,
+        });
+        await appendEvent(runId, 'direct_chat_completed', {
+          sessionId: result.sessionId,
+          providerId: result.providerId ?? null,
+          model: result.model ?? null,
+          billed: Boolean(result.billing?.ok),
+        });
+        return { sessionId: result.sessionId };
+      } catch (err) {
+        await appendEvent(runId, 'direct_chat_failed', {
+          code: err?.code ?? null,
+          message: err instanceof Error ? err.message : String(err),
+        });
+        if (isDirectChatSessionId(row.agent_session_id)) {
+          throw err;
+        }
+      }
+    }
     if (runOptions.toolMode === 'code' && toolGatewayStatus?.enabled) {
       const workingDir = userAuth?.resolveWorkingDir
         ? await userAuth.resolveWorkingDir(row.user_id)
@@ -592,6 +623,7 @@ export function createAgentRunGateway({
       } : null,
       terminalStatuses: [...TERMINAL_STATUSES],
       toolGateway: toolGateway?.getStatus ? toolGateway.getStatus() : null,
+      directChat: directChatService?.getStatus ? directChatService.getStatus() : null,
     };
   }
 
diff --git a/agent-run-gateway.test.mjs b/agent-run-gateway.test.mjs
index e8f71ef..1d5864b 100644
--- a/agent-run-gateway.test.mjs
+++ b/agent-run-gateway.test.mjs
@@ -255,6 +255,52 @@ test('agent run starts a session and marks submitted reply as succeeded', async
   assert.equal(pool.runs.get(run.id).attempts, 1);
 });
 
+test('agent run uses direct chat service for eligible chat messages', async () => {
+  const pool = createFakePool();
+  const directRuns = [];
+  const gateway = createAgentRunGateway({
+    pool,
+    userAuth: {},
+    tkmindProxy: {
+      async startSessionForUser() {
+        assert.fail('goose session should not start for direct chat');
+      },
+      async submitSessionReplyForUser() {
+        assert.fail('goose reply should not be submitted for direct chat');
+      },
+    },
+    directChatService: {
+      canHandle({ toolMode, userMessage }) {
+        return toolMode === 'chat' && userMessage?.content?.[0]?.text === 'hi';
+      },
+      async run(input) {
+        directRuns.push(input);
+        return {
+          sessionId: 'h5direct_session-1',
+          providerId: 'custom_deepseek',
+          model: 'deepseek-chat',
+          billing: { ok: true },
+        };
+      },
+      getStatus() {
+        return { enabled: true };
+      },
+    },
+    retryDelaysMs: [],
+  });
+
+  const run = await gateway.createRun('user-1', {
+    requestId: 'req-direct',
+    userMessage: { role: 'user', content: [{ type: 'text', text: 'hi' }] },
+  });
+
+  await waitFor(() => pool.runs.get(run.id)?.status === 'succeeded');
+  assert.equal(pool.runs.get(run.id).agent_session_id, 'h5direct_session-1');
+  assert.equal(directRuns.length, 1);
+  assert.equal(directRuns[0].requestId, 'req-direct');
+  assert.ok(pool.events.some((event) => event.eventType === 'direct_chat_completed'));
+});
+
 test('agent run with code tool mode starts and submits with code policy', async () => {
   const pool = createFakePool();
   const submitted = [];
diff --git a/conversation-memory.mjs b/conversation-memory.mjs
index 6410b35..3dd5cb8 100644
--- a/conversation-memory.mjs
+++ b/conversation-memory.mjs
@@ -154,6 +154,22 @@ export function createConversationMemoryService(pool, options = {}) {
   const now = options.now ?? (() => Date.now());
   const fetchImpl = options.fetch ?? undiciFetch;
   const encryptionKey = options.encryptionKey;
+  const llmWarningIntervalMs = Math.max(
+    0,
+    Number(options.llmWarningIntervalMs ?? process.env.USER_CONVERSATION_MEMORY_LLM_WARN_INTERVAL_MS ?? 60000) || 0,
+  );
+  let lastLlmExtractionWarningAt = 0;
+
+  function warnLlmExtractionFailed(err) {
+    const ts = now();
+    if (
+      lastLlmExtractionWarningAt > 0 &&
+      llmWarningIntervalMs > 0 &&
+      ts - lastLlmExtractionWarningAt < llmWarningIntervalMs
+    ) return;
+    lastLlmExtractionWarningAt = ts;
+    console.warn('[conversation-memory] LLM extraction failed:', err instanceof Error ? err.message : err);
+  }
 
   function isEnabled() {
     return process.env.USER_CONVERSATION_MEMORY_ENABLED !== '0';
@@ -318,7 +334,7 @@ export function createConversationMemoryService(pool, options = {}) {
         memories = await extractWithLlm(messages);
         extractionSucceeded = Array.isArray(memories);
       } catch (err) {
-        console.warn('[conversation-memory] LLM extraction failed:', err instanceof Error ? err.message : err);
+        warnLlmExtractionFailed(err);
       }
     }
     if (!memories) memories = fallbackMemoriesFromMessages(messages);
diff --git a/conversation-memory.test.mjs b/conversation-memory.test.mjs
index 927a0e2..23b23d4 100644
--- a/conversation-memory.test.mjs
+++ b/conversation-memory.test.mjs
@@ -1,8 +1,9 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import { createConversationMemoryService, extractConversationMessageText } from './conversation-memory.mjs';
+import { encryptSecret } from './llm-providers.mjs';
 
-function createPool() {
+function createPool({ provider = null } = {}) {
   const state = {
     messages: [],
     memories: [],
@@ -101,7 +102,7 @@ function createPool() {
             .map((item) => ({ ...item, status: 'active' })),
         ];
       }
-      if (sql.includes('FROM h5_llm_provider_keys')) return [[]];
+      if (sql.includes('FROM h5_llm_provider_keys')) return [[provider].filter(Boolean)];
       throw new Error(`Unexpected SQL: ${sql}`);
     },
   };
@@ -179,6 +180,60 @@ test('saveAndAnalyze leaves messages unanalyzed when extraction fails and no mem
   else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
 });
 
+test('saveAndAnalyze throttles repeated llm extraction warnings', async () => {
+  const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+  process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '1';
+  const warnings = [];
+  const originalWarn = console.warn;
+  console.warn = (...args) => warnings.push(args);
+  let currentNow = 4000;
+  try {
+    const secret = encryptSecret('test-key', 'memory-test-key');
+    const pool = createPool({
+      provider: {
+        api_url: 'https://llm.example.com/v1',
+        default_model: 'memory-model',
+        api_key_ciphertext: secret.ciphertext,
+        api_key_iv: secret.iv,
+        api_key_tag: secret.tag,
+      },
+    });
+    const service = createConversationMemoryService(pool, {
+      now: () => currentNow,
+      encryptionKey: 'memory-test-key',
+      llmWarningIntervalMs: 60000,
+      fetch: async () => {
+        throw new Error('upstream unavailable');
+      },
+    });
+
+    await service.saveAndAnalyze('session-warn-1', 'user-warn', [
+      {
+        id: 'warn-1',
+        role: 'user',
+        content: [{ type: 'text', text: '今天下雨了。' }],
+        metadata: { userVisible: true },
+      },
+    ]);
+    currentNow += 1000;
+    await service.saveAndAnalyze('session-warn-2', 'user-warn', [
+      {
+        id: 'warn-2',
+        role: 'user',
+        content: [{ type: 'text', text: '明天可能也下雨。' }],
+        metadata: { userVisible: true },
+      },
+    ]);
+  } finally {
+    console.warn = originalWarn;
+    if (previous == null) delete process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+    else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
+  }
+
+  assert.equal(warnings.length, 1);
+  assert.match(String(warnings[0][0]), /conversation-memory/);
+});
+
 test('saveAndAnalyze still marks messages analyzed when llm extraction is disabled and fallback stores nothing', async () => {
   const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
   process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '0';
diff --git a/direct-chat-service.mjs b/direct-chat-service.mjs
new file mode 100644
index 0000000..7a2c679
--- /dev/null
+++ b/direct-chat-service.mjs
@@ -0,0 +1,253 @@
+import crypto from 'node:crypto';
+
+export const DIRECT_CHAT_SESSION_PREFIX = 'h5direct_';
+
+function envFlag(value, fallback = false) {
+  const raw = String(value ?? '').trim().toLowerCase();
+  if (!raw) return fallback;
+  return ['1', 'true', 'yes', 'on'].includes(raw);
+}
+
+export function isDirectChatSessionId(sessionId) {
+  return String(sessionId ?? '').startsWith(DIRECT_CHAT_SESSION_PREFIX);
+}
+
+export function sendDirectChatSessionEvents(req, res, snapshot) {
+  let closed = false;
+  let keepalive = null;
+  const close = () => {
+    closed = true;
+    if (keepalive) clearInterval(keepalive);
+  };
+  const writeEvent = (id, payload) => {
+    if (closed || res.writableEnded) return;
+    res.write(`id: ${id}\n`);
+    res.write(`data: ${JSON.stringify(payload)}\n\n`);
+  };
+  res.status(200);
+  res.setHeader('Content-Type', 'text/event-stream; charset=utf-8');
+  res.setHeader('Cache-Control', 'no-cache, no-transform');
+  res.setHeader('Connection', 'keep-alive');
+  res.setHeader('X-Accel-Buffering', 'no');
+  res.flushHeaders?.();
+  req.once?.('close', close);
+  keepalive = setInterval(() => {
+    if (!closed && !res.writableEnded) res.write(': keepalive\n\n');
+  }, 20000);
+  writeEvent(1, {
+    type: 'UpdateConversation',
+    conversation: snapshot.messages ?? [],
+  });
+  writeEvent(2, {
+    type: 'Finish',
+    token_state: null,
+  });
+  close();
+  res.end();
+}
+
+function createDirectSessionId() {
+  return `${DIRECT_CHAT_SESSION_PREFIX}${crypto.randomUUID()}`;
+}
+
+function messageText(message) {
+  const displayText = message?.metadata?.displayText;
+  if (typeof displayText === 'string' && displayText.trim()) return displayText.trim();
+  const content = message?.content;
+  if (typeof content === 'string') return content.trim();
+  if (!Array.isArray(content)) return String(message?.text ?? message?.value ?? '').trim();
+  return content
+    .map((item) => {
+      if (typeof item === 'string') return item;
+      if (item?.type === 'text') return item.text ?? '';
+      return '';
+    })
+    .join('\n')
+    .trim();
+}
+
+function assistantFacingText(message) {
+  const content = message?.content;
+  if (!Array.isArray(content)) return messageText(message);
+  return content
+    .map((item) => {
+      if (typeof item === 'string') return item;
+      if (item?.type === 'text') return item.text ?? '';
+      return '';
+    })
+    .join('\n')
+    .trim();
+}
+
+function isTextOnlyUserMessage(message) {
+  const content = message?.content;
+  if (!Array.isArray(content)) return Boolean(messageText(message));
+  if (content.length === 0) return false;
+  return content.every((item) => {
+    if (typeof item === 'string') return true;
+    return item?.type === 'text';
+  });
+}
+
+function renderMemoryLines(memories) {
+  const items = Array.isArray(memories) ? memories : [];
+  if (items.length === 0) return '';
+  return [
+    '以下是当前用户的长期记忆，只用于改善回答，不要主动暴露记忆来源：',
+    ...items.slice(0, 30).map((item) => {
+      const label = item?.label ? `[${item.label}] ` : '';
+      const text = String(item?.text ?? item?.memory_text ?? item?.memoryText ?? '').trim();
+      return text ? `- ${label}${text}` : '';
+    }).filter(Boolean),
+  ].join('\n');
+}
+
+function buildModelMessages({ previousMessages, userMessage, memories }) {
+  const system = [
+    '你是 TKMind H5 聊天助手。',
+    '优先直接回答用户问题；不要调用工具；涉及需要执行代码、改文件、生成页面或操作外部系统的任务时，简要说明已交由后台任务处理或请用户确认具体任务。',
+    renderMemoryLines(memories),
+  ].filter(Boolean).join('\n\n');
+
+  const history = Array.isArray(previousMessages) ? previousMessages.slice(-12) : [];
+  return [
+    { role: 'system', content: system },
+    ...history
+      .map((message) => ({
+        role: message?.role === 'assistant' ? 'assistant' : 'user',
+        content: messageText(message),
+      }))
+      .filter((message) => message.content),
+    { role: 'user', content: assistantFacingText(userMessage) || messageText(userMessage) },
+  ];
+}
+
+function buildAssistantMessage(reply, { requestId, now }) {
+  return {
+    id: `direct-assistant-${requestId || crypto.randomUUID()}`,
+    role: 'assistant',
+    created: now,
+    content: [{ type: 'text', text: reply }],
+    metadata: {
+      userVisible: true,
+      source: 'portal-direct-chat',
+    },
+  };
+}
+
+function normalizeUsageForBilling(usage, previousState) {
+  if (!usage) return null;
+  const input = Math.max(0, Number(usage.inputTokens ?? 0) || 0);
+  const output = Math.max(0, Number(usage.outputTokens ?? 0) || 0);
+  if (input <= 0 && output <= 0) return null;
+  return {
+    accumulatedInputTokens: Number(previousState?.lastInputTokens ?? 0) + input,
+    accumulatedOutputTokens: Number(previousState?.lastOutputTokens ?? 0) + output,
+  };
+}
+
+export function createDirectChatService({
+  userAuth,
+  llmProviderService,
+  sessionSnapshotService,
+  memoryV2 = null,
+  conversationMemoryService = null,
+  enabled = envFlag(process.env.MEMIND_DIRECT_CHAT_ENABLED, false),
+} = {}) {
+  function getStatus() {
+    return {
+      enabled,
+      sessionPrefix: DIRECT_CHAT_SESSION_PREFIX,
+    };
+  }
+
+  function canHandle({ sessionId = null, toolMode = 'chat', userMessage } = {}) {
+    if (!enabled) return false;
+    if (toolMode !== 'chat') return false;
+    if (sessionId && !isDirectChatSessionId(sessionId)) return false;
+    if (!isTextOnlyUserMessage(userMessage)) return false;
+    return Boolean(userAuth && llmProviderService && sessionSnapshotService);
+  }
+
+  async function resolveMemories(userId, sessionId, query) {
+    if (!userId) return [];
+    if (memoryV2?.resolve) {
+      const result = await memoryV2.resolve({ userId, sessionId, query, limit: 40 }).catch(() => null);
+      return Array.isArray(result?.memories) ? result.memories : [];
+    }
+    if (conversationMemoryService?.listMemories) {
+      return conversationMemoryService.listMemories(userId, { limit: 40 }).catch(() => []);
+    }
+    return [];
+  }
+
+  async function run({ userId, sessionId = null, requestId, userMessage } = {}) {
+    if (!canHandle({ sessionId, toolMode: 'chat', userMessage })) {
+      const err = new Error('Direct chat is not available for this run');
+      err.code = 'DIRECT_CHAT_UNAVAILABLE';
+      err.retryable = false;
+      throw err;
+    }
+
+    const activeSessionId = sessionId || createDirectSessionId();
+    const snapshot = await sessionSnapshotService.get(activeSessionId).catch(() => null);
+    const previousMessages = Array.isArray(snapshot?.messages) ? snapshot.messages : [];
+    const memories = await resolveMemories(userId, activeSessionId, messageText(userMessage));
+    const completion = await llmProviderService.createChatCompletion({
+      messages: buildModelMessages({ previousMessages, userMessage, memories }),
+    });
+    if (!completion?.ok) {
+      const err = new Error(completion?.message ?? 'Portal 直连聊天失败');
+      err.code = 'DIRECT_CHAT_COMPLETION_FAILED';
+      throw err;
+    }
+
+    const now = new Date().toISOString();
+    const assistantMessage = buildAssistantMessage(completion.reply, { requestId, now });
+    const messages = [...previousMessages, userMessage, assistantMessage];
+    const session = {
+      id: activeSessionId,
+      name: snapshot?.session?.name ?? 'New Chat',
+      working_dir: snapshot?.session?.working_dir ?? '',
+      message_count: messages.length,
+      created_at: snapshot?.session?.created_at ?? now,
+      updated_at: now,
+      user_set_name: snapshot?.session?.user_set_name ?? false,
+      recipe: snapshot?.session?.recipe ?? null,
+      conversation: messages,
+    };
+    if (!sessionId) {
+      await userAuth.registerAgentSession(userId, activeSessionId, 'h5-direct');
+    }
+    await sessionSnapshotService.save(activeSessionId, userId, session, messages);
+
+    let billing = null;
+    const tokenState = normalizeUsageForBilling(
+      completion.usage,
+      userAuth.getBillingState ? await userAuth.getBillingState(activeSessionId).catch(() => null) : null,
+    );
+    if (tokenState && userAuth.billSessionUsage) {
+      billing = await userAuth.billSessionUsage(userId, activeSessionId, tokenState, requestId).catch((err) => ({
+        ok: false,
+        message: err instanceof Error ? err.message : String(err),
+      }));
+    }
+
+    return {
+      ok: true,
+      sessionId: activeSessionId,
+      messages,
+      session,
+      assistantMessage,
+      billing,
+      model: completion.model,
+      providerId: completion.providerId,
+    };
+  }
+
+  return {
+    getStatus,
+    canHandle,
+    run,
+  };
+}
diff --git a/direct-chat-service.test.mjs b/direct-chat-service.test.mjs
new file mode 100644
index 0000000..fb9fa41
--- /dev/null
+++ b/direct-chat-service.test.mjs
@@ -0,0 +1,186 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  createDirectChatService,
+  isDirectChatSessionId,
+  sendDirectChatSessionEvents,
+} from './direct-chat-service.mjs';
+
+test('direct chat is disabled by default', () => {
+  const service = createDirectChatService({
+    userAuth: {},
+    llmProviderService: {},
+    sessionSnapshotService: {},
+  });
+  assert.equal(service.getStatus().enabled, false);
+  assert.equal(service.canHandle({
+    userMessage: { role: 'user', content: [{ type: 'text', text: 'hi' }] },
+  }), false);
+});
+
+test('direct chat creates a direct session, saves snapshot, and bills returned usage', async () => {
+  const registered = [];
+  const saved = [];
+  const billed = [];
+  const llmMessages = [];
+  const service = createDirectChatService({
+    enabled: true,
+    userAuth: {
+      async registerAgentSession(userId, sessionId, target) {
+        registered.push({ userId, sessionId, target });
+      },
+      async getBillingState() {
+        return { lastInputTokens: 10, lastOutputTokens: 5 };
+      },
+      async billSessionUsage(userId, sessionId, tokenState, requestId) {
+        billed.push({ userId, sessionId, tokenState, requestId });
+        return { ok: true, costCents: 1 };
+      },
+    },
+    llmProviderService: {
+      async createChatCompletion({ messages }) {
+        llmMessages.push(messages);
+        return {
+          ok: true,
+          providerId: 'custom_deepseek',
+          model: 'deepseek-chat',
+          reply: '你好，已收到。',
+          usage: { inputTokens: 3, outputTokens: 4 },
+        };
+      },
+    },
+    sessionSnapshotService: {
+      async get() {
+        return null;
+      },
+      async save(sessionId, userId, session, messages) {
+        saved.push({ sessionId, userId, session, messages });
+      },
+    },
+    memoryV2: {
+      async resolve() {
+        return { memories: [{ label: 'preference', text: '喜欢简洁回答' }] };
+      },
+    },
+  });
+
+  const result = await service.run({
+    userId: 'user-1',
+    requestId: 'req-1',
+    userMessage: {
+      id: 'msg-user-1',
+      role: 'user',
+      content: [{ type: 'text', text: '打个招呼' }],
+      metadata: { userVisible: true },
+    },
+  });
+
+  assert.equal(result.ok, true);
+  assert.equal(isDirectChatSessionId(result.sessionId), true);
+  assert.deepEqual(registered, [
+    { userId: 'user-1', sessionId: result.sessionId, target: 'h5-direct' },
+  ]);
+  assert.equal(saved.length, 1);
+  assert.equal(saved[0].messages.length, 2);
+  assert.equal(saved[0].messages[1].content[0].text, '你好，已收到。');
+  assert.match(llmMessages[0][0].content, /喜欢简洁回答/);
+  assert.deepEqual(billed, [{
+    userId: 'user-1',
+    sessionId: result.sessionId,
+    tokenState: {
+      accumulatedInputTokens: 13,
+      accumulatedOutputTokens: 9,
+    },
+    requestId: 'req-1',
+  }]);
+});
+
+test('direct chat run can be replayed through finite session events', async () => {
+  const snapshots = new Map();
+  const service = createDirectChatService({
+    enabled: true,
+    userAuth: {
+      async registerAgentSession() {},
+      async getBillingState() {
+        return null;
+      },
+      async billSessionUsage() {
+        return null;
+      },
+    },
+    llmProviderService: {
+      async createChatCompletion() {
+        return {
+          ok: true,
+          reply: '这是直连回复。',
+          usage: null,
+        };
+      },
+    },
+    sessionSnapshotService: {
+      async get(sessionId) {
+        return snapshots.get(sessionId) ?? null;
+      },
+      async save(sessionId, userId, session, messages) {
+        snapshots.set(sessionId, { session, messages, userId });
+      },
+    },
+  });
+
+  const result = await service.run({
+    userId: 'user-1',
+    requestId: 'req-e2e',
+    userMessage: {
+      id: 'user-e2e',
+      role: 'user',
+      content: [{ type: 'text', text: '讲个程序员笑话' }],
+      metadata: { userVisible: true },
+    },
+  });
+  const snapshot = snapshots.get(result.sessionId);
+  const res = {
+    statusCode: 200,
+    headers: {},
+    chunks: [],
+    ended: false,
+    writableEnded: false,
+    status(code) {
+      this.statusCode = code;
+      return this;
+    },
+    setHeader(key, value) {
+      this.headers[key] = value;
+    },
+    write(chunk) {
+      this.chunks.push(chunk);
+    },
+    end() {
+      this.ended = true;
+      this.writableEnded = true;
+    },
+  };
+
+  sendDirectChatSessionEvents({ once() {} }, res, snapshot);
+
+  const stream = res.chunks.join('');
+  assert.equal(res.ended, true);
+  assert.equal(res.headers['Content-Type'], 'text/event-stream; charset=utf-8');
+  assert.match(stream, /"type":"UpdateConversation"/);
+  assert.match(stream, /"type":"Finish"/);
+  assert.match(stream, /这是直连回复。/);
+});
+
+test('direct chat rejects non-text messages', () => {
+  const service = createDirectChatService({
+    enabled: true,
+    userAuth: {},
+    llmProviderService: {},
+    sessionSnapshotService: {},
+  });
+  assert.equal(service.canHandle({
+    userMessage: {
+      role: 'user',
+      content: [{ type: 'image_url', image_url: { url: 'x' } }],
+    },
+  }), false);
+});
diff --git a/llm-providers.mjs b/llm-providers.mjs
index 317d196..e0d984f 100644
--- a/llm-providers.mjs
+++ b/llm-providers.mjs
@@ -342,6 +342,51 @@ function profileFromRow(row, decryptRow) {
   };
 }
 
+function openAiCompatibleApiUrlForProfile(profile) {
+  const apiUrl = profile.apiUrl || BUILTIN_PROVIDER_TEST_URLS[profile.providerId] || '';
+  return resolveChatCompletionsUrl(apiUrl);
+}
+
+function extractChatCompletionText(payload) {
+  const content = payload?.choices?.[0]?.message?.content;
+  if (Array.isArray(content)) {
+    return content
+      .map((item) => {
+        if (typeof item === 'string') return item;
+        if (item?.type === 'text') return item.text ?? '';
+        return '';
+      })
+      .join('')
+      .trim();
+  }
+  if (content != null) return String(content);
+  const fallback = payload?.message?.content ?? payload?.output_text ?? payload?.output;
+  return fallback == null ? '' : String(fallback);
+}
+
+function normalizeChatUsage(usage) {
+  if (!usage || typeof usage !== 'object') return null;
+  const inputTokens = Number(
+    usage.prompt_tokens ??
+      usage.input_tokens ??
+      usage.promptTokens ??
+      usage.inputTokens ??
+      0,
+  );
+  const outputTokens = Number(
+    usage.completion_tokens ??
+      usage.output_tokens ??
+      usage.completionTokens ??
+      usage.outputTokens ??
+      0,
+  );
+  return {
+    inputTokens: Number.isFinite(inputTokens) ? inputTokens : 0,
+    outputTokens: Number.isFinite(outputTokens) ? outputTokens : 0,
+    raw: usage,
+  };
+}
+
 function normalizeExecutor(raw) {
   const executor = String(raw ?? '').trim().toLowerCase();
   return executorById[executor] ? executor : null;
@@ -1386,6 +1431,62 @@ export function createLlmProviderService(
       return buildExecutorLaunchPlan(runtime, options);
     },
 
+    async createChatCompletion({ messages, model = null, temperature = 0.7 } = {}, fetchImpl = apiFetchImpl) {
+      const row = await getSelectedRow();
+      if (!row) return { ok: false, message: '未配置可用的聊天模型' };
+      const profile = profileFromRow(row, decryptRow);
+      const apiUrl = openAiCompatibleApiUrlForProfile(profile);
+      if (!apiUrl) {
+        return {
+          ok: false,
+          message: `${row.name ?? profile.providerId} 暂不支持 Portal 直连聊天`,
+        };
+      }
+      const selectedModel = String(model || row.default_model || profile.defaultModel || '').trim();
+      if (!selectedModel) return { ok: false, message: '未配置聊天模型名称' };
+      const upstream = await fetchImpl(apiUrl, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          Authorization: `Bearer ${profile.apiKey}`,
+        },
+        body: JSON.stringify({
+          model: selectedModel,
+          messages: Array.isArray(messages) ? messages : [],
+          stream: false,
+          temperature,
+          ...(profile.relayProvider ? { provider: profile.relayProvider } : {}),
+        }),
+        dispatcher: apiUrl.startsWith('https://') ? insecureDispatcher : undefined,
+      });
+      const text = await upstream.text().catch(() => '');
+      if (!upstream.ok) {
+        return {
+          ok: false,
+          status: upstream.status,
+          message: text.slice(0, 500) || `聊天模型请求失败 (${upstream.status})`,
+        };
+      }
+      let payload;
+      try {
+        payload = JSON.parse(text);
+      } catch {
+        return { ok: false, message: '聊天模型响应不是 JSON' };
+      }
+      const reply = extractChatCompletionText(payload).trim();
+      if (!reply) return { ok: false, message: '聊天模型未返回文本内容' };
+      return {
+        ok: true,
+        providerKeyId: row.id,
+        providerId: profile.providerId,
+        providerKind: profile.providerKind,
+        model: selectedModel,
+        reply,
+        usage: normalizeChatUsage(payload?.usage),
+        raw: payload,
+      };
+    },
+
     async listExecutorLaunchPlans(options = {}) {
       const runtimes = await this.listExecutorRuntimeConfigs({
         purpose: options.purpose ?? 'default',
diff --git a/llm-providers.test.mjs b/llm-providers.test.mjs
index ace745d..a12de9d 100644
--- a/llm-providers.test.mjs
+++ b/llm-providers.test.mjs
@@ -331,6 +331,68 @@ test('testKey checks builtin DeepSeek through OpenAI compatible endpoint', async
   assert.equal(calls[0].body.model, 'deepseek-chat');
 });
 
+test('createChatCompletion uses selected OpenAI-compatible provider', async () => {
+  const encrypted = encryptSecret('sk-direct-test', 'unit-test-secret');
+  const row = {
+    id: 'key-direct',
+    provider_id: CUSTOM_PROVIDER_ID,
+    provider_kind: 'custom',
+    api_url: 'http://127.0.0.1:19999/v1',
+    base_path: null,
+    models_json: JSON.stringify(['direct-model']),
+    goosed_provider_id: null,
+    engine: 'openai',
+    relay_provider: 'deepseek',
+    name: 'Direct Provider',
+    api_key_ciphertext: encrypted.ciphertext,
+    api_key_iv: encrypted.iv,
+    api_key_tag: encrypted.tag,
+    default_model: 'direct-model',
+    status: 'active',
+    is_selected: 1,
+    created_at: 1,
+    updated_at: 1,
+  };
+  const pool = {
+    async query(sql, params = []) {
+      if (sql.includes('WHERE is_selected = 1')) return [[row]];
+      throw new Error(`Unexpected SQL: ${sql} ${JSON.stringify(params)}`);
+    },
+  };
+  const calls = [];
+  const mockFetch = async (url, init) => {
+    calls.push({ url: String(url), init, body: JSON.parse(init.body) });
+    return {
+      ok: true,
+      text: async () => JSON.stringify({
+        choices: [{ message: { content: 'direct reply' } }],
+        usage: { prompt_tokens: 11, completion_tokens: 7 },
+      }),
+    };
+  };
+  const service = createLlmProviderService(pool, {
+    encryptionKey: 'unit-test-secret',
+    apiFetchImpl: mockFetch,
+  });
+
+  const result = await service.createChatCompletion({
+    messages: [{ role: 'user', content: 'hi' }],
+  });
+
+  assert.equal(result.ok, true);
+  assert.equal(result.reply, 'direct reply');
+  assert.equal(result.model, 'direct-model');
+  assert.deepEqual(result.usage, {
+    inputTokens: 11,
+    outputTokens: 7,
+    raw: { prompt_tokens: 11, completion_tokens: 7 },
+  });
+  assert.equal(calls[0].url, 'http://127.0.0.1:19999/v1/chat/completions');
+  assert.equal(calls[0].init.headers.Authorization, 'Bearer sk-direct-test');
+  assert.equal(calls[0].body.provider, 'deepseek');
+  assert.equal(calls[0].body.stream, false);
+});
+
 test('getExecutorRuntimeConfig resolves aider env from binding', async () => {
   const encrypted = encryptSecret('sk-deepseek-test', 'unit-test-secret');
   const keyRow = {
diff --git a/mindspace-public-asset-token.test.mjs b/mindspace-public-asset-token.test.mjs
index 578bfe8..e828e63 100644
--- a/mindspace-public-asset-token.test.mjs
+++ b/mindspace-public-asset-token.test.mjs
@@ -44,7 +44,7 @@ test('normalizePublicAssetReferences rewrites absolute asset urls to same-origin
   const html = [
     '<img src="https://m.tkmind.cn/api/mindspace/v1/assets/asset-1/download?inline=1">',
     '<img src="http://127.0.0.1:5173/api/mindspace/v1/assets/asset-2/download?inline=1&amp;v=3">',
-    '<meta property="og:image" content="https://mm.tkmind.cn/api/mindspace/v1/assets/asset-3/download?inline=1">',
+    '<meta property="og:image" content="https://m.tkmind.cn/api/mindspace/v1/assets/asset-3/download?inline=1">',
   ].join('');
 
   const normalized = normalizePublicAssetReferences(html);
diff --git a/mindspace-public-delivery.test.mjs b/mindspace-public-delivery.test.mjs
index 41a745d..2b7a57e 100644
--- a/mindspace-public-delivery.test.mjs
+++ b/mindspace-public-delivery.test.mjs
@@ -51,7 +51,7 @@ test('handleMindSpaceLongImageDownload renders and downloads when requested', as
   const handled = await handleMindSpaceLongImageDownload({
     query: { download: 'long-image' },
     filePath: '/tmp/report.html',
-    pageUrl: 'https://mm.tkmind.cn/MindSpace/u/public/report.html',
+    pageUrl: 'https://m.tkmind.cn/MindSpace/u/public/report.html',
     res,
     isLongImageDownloadRequest: () => true,
     longImagePathForHtml: () => '/tmp/report.long.png',
@@ -62,7 +62,7 @@ test('handleMindSpaceLongImageDownload renders and downloads when requested', as
 
   assert.equal(handled, true);
   assert.deepEqual(calls[0], ['render', {
-    url: 'https://mm.tkmind.cn/MindSpace/u/public/report.html',
+    url: 'https://m.tkmind.cn/MindSpace/u/public/report.html',
     outputPath: '/tmp/report.long.png',
   }]);
   assert.deepEqual(calls[1], ['set', 'Cache-Control', 'no-store']);
@@ -101,10 +101,10 @@ test('decorateMindSpacePublishedHtml returns decorated html and csp', () => {
     html: `<html><body><script>${pageScript}</script>demo</body></html>`,
     embed: false,
     context: {
-      origin: 'https://mm.tkmind.cn',
-      pageUrl: 'https://mm.tkmind.cn/MindSpace/u/public/report.html',
-      pageDirUrl: 'https://mm.tkmind.cn/MindSpace/u/public/',
-      fallbackImageUrl: 'https://mm.tkmind.cn/MindSpace/u/public/report.thumbnail.png',
+      origin: 'https://m.tkmind.cn',
+      pageUrl: 'https://m.tkmind.cn/MindSpace/u/public/report.html',
+      pageDirUrl: 'https://m.tkmind.cn/MindSpace/u/public/',
+      fallbackImageUrl: 'https://m.tkmind.cn/MindSpace/u/public/report.thumbnail.png',
     },
     userAgent: 'MicroMessenger',
     preparePublicationHtmlForEmbed: (value) => value,
diff --git a/mindspace-public-page-context.test.mjs b/mindspace-public-page-context.test.mjs
index 12c6cd8..6cd39c8 100644
--- a/mindspace-public-page-context.test.mjs
+++ b/mindspace-public-page-context.test.mjs
@@ -4,8 +4,8 @@ import { buildPublishedHtmlViewContext, resolvePublicRequestOrigin } from './min
 
 test('resolvePublicRequestOrigin prefers https for public hosts and forwarded proto for local hosts', () => {
   assert.equal(
-    resolvePublicRequestOrigin({ hostHeader: 'mm.tkmind.cn', forwardedProto: 'http', protocol: 'http' }),
-    'https://mm.tkmind.cn',
+    resolvePublicRequestOrigin({ hostHeader: 'm.tkmind.cn', forwardedProto: 'http', protocol: 'http' }),
+    'https://m.tkmind.cn',
   );
   assert.equal(
     resolvePublicRequestOrigin({ hostHeader: '127.0.0.1:8081', forwardedProto: 'http', protocol: 'https' }),
@@ -15,25 +15,25 @@ test('resolvePublicRequestOrigin prefers https for public hosts and forwarded pr
 
 test('buildPublishedHtmlViewContext builds file and directory page urls', () => {
   const direct = buildPublishedHtmlViewContext({
-    origin: 'https://mm.tkmind.cn',
+    origin: 'https://m.tkmind.cn',
     requestPath: '/MindSpace/user-1/public/report.html?x=1',
     filePath: '/tmp/MindSpace/user-1/public/report.html',
   });
-  assert.equal(direct.pageUrl, 'https://mm.tkmind.cn/MindSpace/user-1/public/report.html');
-  assert.equal(direct.pageDirUrl, 'https://mm.tkmind.cn/MindSpace/user-1/public/');
+  assert.equal(direct.pageUrl, 'https://m.tkmind.cn/MindSpace/user-1/public/report.html');
+  assert.equal(direct.pageDirUrl, 'https://m.tkmind.cn/MindSpace/user-1/public/');
 
   const implicit = buildPublishedHtmlViewContext({
-    origin: 'https://mm.tkmind.cn',
+    origin: 'https://m.tkmind.cn',
     requestPath: '/MindSpace/user-1/public/report',
     filePath: '/tmp/MindSpace/user-1/public/index.html',
   });
-  assert.equal(implicit.pageUrl, 'https://mm.tkmind.cn/MindSpace/user-1/public/report/');
-  assert.equal(implicit.pageDirUrl, 'https://mm.tkmind.cn/MindSpace/user-1/public/report/');
+  assert.equal(implicit.pageUrl, 'https://m.tkmind.cn/MindSpace/user-1/public/report/');
+  assert.equal(implicit.pageDirUrl, 'https://m.tkmind.cn/MindSpace/user-1/public/report/');
 });
 
 test('buildPublishedHtmlViewContext adds thumbnail png fallback when svg sibling exists', () => {
   const context = buildPublishedHtmlViewContext({
-    origin: 'https://mm.tkmind.cn',
+    origin: 'https://m.tkmind.cn',
     requestPath: '/MindSpace/user-1/public/report.html',
     filePath: '/tmp/MindSpace/user-1/public/report.html',
     fileExists: (value) => value.endsWith('.thumbnail.svg'),
@@ -41,6 +41,6 @@ test('buildPublishedHtmlViewContext adds thumbnail png fallback when svg sibling
   });
   assert.equal(
     context.fallbackImageUrl,
-    'https://mm.tkmind.cn/MindSpace/user-1/public/report.thumbnail.png',
+    'https://m.tkmind.cn/MindSpace/user-1/public/report.thumbnail.png',
   );
 });
diff --git a/package.json b/package.json
index cd5e102..63a3b5f 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "smoke:memory-v2-qdrant": "node scripts/smoke-memory-v2-qdrant.mjs",
     "smoke:memory-v2-external": "node scripts/smoke-memory-v2-external.mjs",
     "mock:memory-v2-services": "node scripts/mock-memory-v2-services.mjs",
-    "test": "node --test auth.test.mjs asr-proxy.test.mjs billing.test.mjs billing-recharge.test.mjs wechat-pay.test.mjs wechat-oauth.test.mjs wechat-mp.test.mjs schedule-intent.test.mjs schedule-reminder-worker.test.mjs capabilities.test.mjs policies.test.mjs chat-skills.test.mjs chat-finish-sync.test.mjs conversation-display.test.mjs user-publish.test.mjs user-memory-profile.test.mjs skills-registry.test.mjs agent-run-gateway.test.mjs agent-run-routes.test.mjs tool-gateway.test.mjs mindspace.test.mjs mindspace-scan.test.mjs mindspace-assets.test.mjs mindspace-local-runtime-services.test.mjs mindspace-local-server-adapter.test.mjs mindspace-public-asset-token.test.mjs mindspace-remote-server-adapter.test.mjs mindspace-server-adapter.test.mjs mindspace-pages.test.mjs mindspace-html-download-links.test.mjs mindspace-page-purge.test.mjs mindspace-public-delivery.test.mjs mindspace-public-page-context.test.mjs mindspace-public-route.test.mjs mindspace-publications.test.mjs mindspace-public-links.test.mjs mindspace-chat-save.test.mjs mindspace-chat-docx-package.test.mjs mindspace-public-finish-sync.test.mjs mindspace-chat-context.test.mjs mindspace-canonical-url.test.mjs mindspace-conversation-package.test.mjs mindspace-conversation-package-backfill.test.mjs mindspace-conversation-package-public-html.test.mjs mindspace-conversation-package-verify.test.mjs mindspace-conversation-package-registry.test.mjs mindspace-conversation-package-routes.test.mjs mindspace-conversation-package-store.test.mjs mindspace-conversation-schema.test.mjs mindspace-runtime-config.test.mjs mindspace-service.test.mjs mindspace-storage-adapter.test.mjs mindspace-content-scan.test.mjs mindspace-html-localize.test.mjs mindspace-visual-editor.test.mjs mindspace-cleanup.test.mjs mindspace-thumbnails.test.mjs mindspace-workspace-thumbnails.test.mjs mindspace-workspace-sync.test.mjs mindspace-asset-preview.test.mjs mindspace-agent-jobs.test.mjs mindspace-agent-runner.test.mjs mindspace-sandbox-mcp.test.mjs message-stream.test.mjs mindspace-service/mindspace-rpc-server.test.mjs plaza-posts.test.mjs plaza-interactions.test.mjs plaza-algorithm.test.mjs plaza-seo.test.mjs plaza-ops.test.mjs user-auth.test.mjs llm-providers.test.mjs admin-guard.test.mjs user-feedback.test.mjs memory-v2.test.mjs memory-v2-admin-config.test.mjs memory-v2-adapter-scaffold.test.mjs memory-v2-backend-contract.test.mjs memory-v2-health.test.mjs memory-v2-runtime.test.mjs memory-v2-plugin-backends.test.mjs memory-v2-pgvector.test.mjs memory-v2-pgvector-schema.test.mjs memory-v2-pgvector-backfill.test.mjs memory-v2-pgvector-smoke.test.mjs memory-v2-qdrant.test.mjs memory-v2-weaviate.test.mjs memory-v2-mem0.test.mjs memory-v2-letta.test.mjs memory-v2-external-adapters.test.mjs scripts/embed-memory-v2-local-hash.test.mjs scripts/check-memory-v2-app-canary.test.mjs scripts/check-memory-v2-config-gaps.test.mjs scripts/check-memory-v2-contracts.test.mjs scripts/check-memory-v2-health.test.mjs scripts/check-memory-v2-session-flow.test.mjs scripts/check-memory-v2-stack.test.mjs scripts/setup-memory-v2-pgvector-schema.test.mjs scripts/backfill-memory-v2-pgvector.test.mjs scripts/scaffold-memory-v2-backend.test.mjs scripts/smoke-memory-v2-pgvector.test.mjs scripts/smoke-memory-v2-qdrant.test.mjs scripts/smoke-memory-v2-external.test.mjs scripts/mock-memory-v2-services.test.mjs",
+    "test": "node --test auth.test.mjs asr-proxy.test.mjs billing.test.mjs billing-recharge.test.mjs wechat-pay.test.mjs wechat-oauth.test.mjs wechat-mp.test.mjs schedule-intent.test.mjs schedule-reminder-worker.test.mjs capabilities.test.mjs policies.test.mjs chat-skills.test.mjs chat-finish-sync.test.mjs conversation-display.test.mjs user-publish.test.mjs user-memory-profile.test.mjs skills-registry.test.mjs agent-run-gateway.test.mjs agent-run-routes.test.mjs direct-chat-service.test.mjs tool-gateway.test.mjs mindspace.test.mjs mindspace-scan.test.mjs mindspace-assets.test.mjs mindspace-local-runtime-services.test.mjs mindspace-local-server-adapter.test.mjs mindspace-public-asset-token.test.mjs mindspace-remote-server-adapter.test.mjs mindspace-server-adapter.test.mjs mindspace-pages.test.mjs mindspace-html-download-links.test.mjs mindspace-page-purge.test.mjs mindspace-public-delivery.test.mjs mindspace-public-page-context.test.mjs mindspace-public-route.test.mjs mindspace-publications.test.mjs mindspace-public-links.test.mjs mindspace-chat-save.test.mjs mindspace-chat-docx-package.test.mjs mindspace-public-finish-sync.test.mjs mindspace-chat-context.test.mjs mindspace-canonical-url.test.mjs mindspace-conversation-package.test.mjs mindspace-conversation-package-backfill.test.mjs mindspace-conversation-package-public-html.test.mjs mindspace-conversation-package-verify.test.mjs mindspace-conversation-package-registry.test.mjs mindspace-conversation-package-routes.test.mjs mindspace-conversation-package-store.test.mjs mindspace-conversation-schema.test.mjs mindspace-runtime-config.test.mjs mindspace-service.test.mjs mindspace-storage-adapter.test.mjs mindspace-content-scan.test.mjs mindspace-html-localize.test.mjs mindspace-visual-editor.test.mjs mindspace-cleanup.test.mjs mindspace-thumbnails.test.mjs mindspace-workspace-thumbnails.test.mjs mindspace-workspace-sync.test.mjs mindspace-asset-preview.test.mjs mindspace-agent-jobs.test.mjs mindspace-agent-runner.test.mjs mindspace-sandbox-mcp.test.mjs message-stream.test.mjs mindspace-service/mindspace-rpc-server.test.mjs plaza-posts.test.mjs plaza-interactions.test.mjs plaza-algorithm.test.mjs plaza-seo.test.mjs plaza-ops.test.mjs user-auth.test.mjs llm-providers.test.mjs admin-guard.test.mjs user-feedback.test.mjs memory-v2.test.mjs memory-v2-admin-config.test.mjs memory-v2-adapter-scaffold.test.mjs memory-v2-backend-contract.test.mjs memory-v2-health.test.mjs memory-v2-runtime.test.mjs memory-v2-plugin-backends.test.mjs memory-v2-pgvector.test.mjs memory-v2-pgvector-schema.test.mjs memory-v2-pgvector-backfill.test.mjs memory-v2-pgvector-smoke.test.mjs memory-v2-qdrant.test.mjs memory-v2-weaviate.test.mjs memory-v2-mem0.test.mjs memory-v2-letta.test.mjs memory-v2-external-adapters.test.mjs scripts/embed-memory-v2-local-hash.test.mjs scripts/check-memory-v2-app-canary.test.mjs scripts/check-memory-v2-config-gaps.test.mjs scripts/check-memory-v2-contracts.test.mjs scripts/check-memory-v2-health.test.mjs scripts/check-memory-v2-session-flow.test.mjs scripts/check-memory-v2-stack.test.mjs scripts/setup-memory-v2-pgvector-schema.test.mjs scripts/backfill-memory-v2-pgvector.test.mjs scripts/scaffold-memory-v2-backend.test.mjs scripts/smoke-memory-v2-pgvector.test.mjs scripts/smoke-memory-v2-qdrant.test.mjs scripts/smoke-memory-v2-external.test.mjs scripts/mock-memory-v2-services.test.mjs",
     "test:mindspace-service": "node --test mindspace-service/mindspace-rpc-server.test.mjs",
     "verify:chat-finish-sync": "node scripts/verify-chat-finish-sync.mjs",
     "verify:public-finish-sync-runtime": "node scripts/verify-public-finish-sync-runtime.mjs",
diff --git a/scripts/dev-core.mjs b/scripts/dev-core.mjs
index e710cd4..97a32ec 100644
--- a/scripts/dev-core.mjs
+++ b/scripts/dev-core.mjs
@@ -13,6 +13,7 @@ const opsPort = Number(process.env.OPS_PORT ?? 3002);
 const adminPort = Number(process.env.ADMIN_PORT ?? 8082);
 const portalUrl = `http://127.0.0.1:${portalPort}`;
 const adminUrl = `http://127.0.0.1:${adminPort}`;
+const localMindSpacePublicBase = `http://127.0.0.1:${vitePort}`;
 const plazaPublicBase = (
   process.env.PLAZA_PUBLIC_BASE ?? `http://127.0.0.1:${plazaPort}`
 ).replace(/\/$/, '');
@@ -88,9 +89,15 @@ async function waitFor(url, check, label, retries = 60) {
   throw new Error(`${label} 未在 ${url} 启动`);
 }
 
+const useConfiguredPublicBase = ['1', 'true', 'yes', 'on'].includes(
+  String(process.env.MEMIND_DEV_USE_PROD_PUBLIC_BASE ?? '').trim().toLowerCase(),
+);
 const mindSpacePublicBase = (
-  process.env.H5_PUBLIC_BASE_URL ?? `http://127.0.0.1:${vitePort}`
+  useConfiguredPublicBase && process.env.H5_PUBLIC_BASE_URL
+    ? process.env.H5_PUBLIC_BASE_URL
+    : localMindSpacePublicBase
 ).replace(/\/$/, '');
+process.env.H5_PUBLIC_BASE_URL = mindSpacePublicBase;
 
 const viteEnv = {
   VITE_PLAZA_BASE: plazaPublicBase,
@@ -151,6 +158,7 @@ try {
   console.log('');
   console.log('本地服务：');
   console.log(`  MindSpace UI   http://127.0.0.1:${vitePort}/?preview=mindspace`);
+  console.log(`  MindSpace URL  ${mindSpacePublicBase}`);
   console.log(`  Ops 审核后台   http://127.0.0.1:${opsPort}/ops/`);
   console.log(`  API / Portal   ${portalUrl}`);
   console.log(`  memind_adm     ${adminUrl}`);
diff --git a/server.mjs b/server.mjs
index da2642a..ae5a54e 100644
--- a/server.mjs
+++ b/server.mjs
@@ -164,6 +164,7 @@ import { createScheduleService } from './schedule-service.mjs';
 import { createFeedbackService } from './user-feedback.mjs';
 import { startScheduleReminderWorker } from './schedule-reminder-worker.mjs';
 import { createLlmProviderService, RELAY_BOOTSTRAP } from './llm-providers.mjs';
+import { createDirectChatService, isDirectChatSessionId, sendDirectChatSessionEvents } from './direct-chat-service.mjs';
 import { createSessionSnapshotService } from './session-snapshot.mjs';
 import { createConversationMemoryService } from './conversation-memory.mjs';
 import { createManagedMemoryV2Runtime } from './memory-v2-runtime.mjs';
@@ -285,6 +286,7 @@ let userAuth = null;
 let tkmindProxy = null;
 let agentRunGateway = null;
 let toolGateway = null;
+let directChatService = null;
 let sessionSnapshotService = null;
 let conversationMemoryService = null;
 let memoryV2 = null;
@@ -530,6 +532,13 @@ async function bootstrapUserAuth() {
     sessionSnapshotService = createSessionSnapshotService(pool, {
       conversationMemoryService,
     });
+    directChatService = createDirectChatService({
+      userAuth,
+      llmProviderService,
+      sessionSnapshotService,
+      memoryV2,
+      conversationMemoryService,
+    });
     tkmindProxy = createTkmindProxy({
       apiTarget: API_TARGET,
       apiTargets: API_TARGETS,
@@ -554,6 +563,7 @@ async function bootstrapUserAuth() {
       userAuth,
       tkmindProxy,
       toolGateway,
+      directChatService,
       autoDispatch: ['1', 'true', 'yes', 'on'].includes(
         String(process.env.MEMIND_AGENT_RUN_AUTODISPATCH ?? '1').trim().toLowerCase(),
       ),
@@ -4450,7 +4460,7 @@ api.get('/sessions/:sessionId', async (req, res, next) => {
         const canUseSnapshotCache = hintMc != null && hintUa != null;
         const mcMatch = snapshot.meta.synced_msg_count === hintMc;
         const uaMatch = snapshot.meta.source_updated_at === hintUa;
-        if (canUseSnapshotCache && mcMatch && uaMatch) {
+        if (isDirectChatSessionId(sessionId) || (canUseSnapshotCache && mcMatch && uaMatch)) {
           const sanitizedMessages = sanitizeSessionConversationPublicHtmlLinks(
             snapshot.messages,
             req.currentUser,
@@ -4507,12 +4517,17 @@ api.get('/sessions/:sessionId', async (req, res, next) => {
 api.delete('/sessions/:sessionId', async (req, res, next) => {
   await userAuthReady;
   if (!userAuth || !tkmindProxy) return next();
-  const sessionId = req.params.sessionId;
-  const owns = await userAuth.ownsSession(req.currentUser.id, sessionId);
+    const sessionId = req.params.sessionId;
+    const owns = await userAuth.ownsSession(req.currentUser.id, sessionId);
   if (!owns) {
     return res.status(403).json({ message: '无权访问该会话' });
   }
   try {
+    if (isDirectChatSessionId(sessionId)) {
+      await userAuth.unregisterAgentSession(req.currentUser.id, sessionId);
+      void sessionSnapshotService?.remove(sessionId).catch(() => {});
+      return res.status(204).end();
+    }
     const deleteTarget = await tkmindProxy.resolveTarget(sessionId);
     const upstream = await tkmindProxy.apiFetchTo(deleteTarget, `/sessions/${encodeURIComponent(sessionId)}`, {
       method: 'DELETE',
@@ -4538,6 +4553,13 @@ api.get('/sessions/:sessionId/events', async (req, res, next) => {
   if (!owns) {
     return res.status(403).json({ message: '无权访问该会话' });
   }
+  if (isDirectChatSessionId(sessionId)) {
+    const snapshot = await sessionSnapshotService?.get(sessionId).catch(() => null);
+    if (!snapshot) {
+      return res.status(404).json({ message: '会话不存在' });
+    }
+    return sendDirectChatSessionEvents(req, res, snapshot);
+  }
   const publishDir = resolveMindSpaceUserPublishDir(__dirname, { id: req.currentUser.id });
   const syncPublicHtmlDuringStream = (event) => {
     materializePublicHtmlWritesFromSessionEvent(event, { publishDir });
diff --git a/src/hooks/useTKMindChat.ts b/src/hooks/useTKMindChat.ts
index 8bcf742..ef8e906 100644
--- a/src/hooks/useTKMindChat.ts
+++ b/src/hooks/useTKMindChat.ts
@@ -747,6 +747,10 @@ export function useTKMindChat(
           setChatState('idle');
           setPendingTool(null);
           activeRequestId.current = null;
+          if (sessionId.startsWith('h5direct_')) {
+            unsubscribeRef.current?.();
+            unsubscribeRef.current = null;
+          }
           setSessions((prev) => touchSession(prev, sessionId, 0));
           if (userRef.current && onUserUpdateRef.current) {
             void getMe()
diff --git a/tkmind-proxy.mjs b/tkmind-proxy.mjs
index 07caf80..2ca432a 100644
--- a/tkmind-proxy.mjs
+++ b/tkmind-proxy.mjs
@@ -15,6 +15,7 @@ import {
 import { buildCurrentTimeAgentPrefix, buildTaskRoutingAgentText } from './user-memory-profile.mjs';
 import { reconcileAgentSession } from './session-reconcile.mjs';
 import { createImgproxySigner } from './imgproxy-signer.mjs';
+import { isDirectChatSessionId } from './direct-chat-service.mjs';
 
 const insecureDispatcher = new Agent({
   connect: { rejectUnauthorized: false },
@@ -55,12 +56,22 @@ function extractPublicImageStorageKey(rawUrl) {
   return null;
 }
 
-function buildPublicStandardImageUrl(rawUrl, userId) {
+function resolvePublicBaseUrlFromLayout(publishLayout) {
+  const publicUrl = String(publishLayout?.publicUrl ?? '').trim();
+  if (!publicUrl) return resolvePublicBaseUrl();
+  try {
+    return new URL(publicUrl).origin;
+  } catch {
+    return resolvePublicBaseUrl();
+  }
+}
+
+function buildPublicStandardImageUrl(rawUrl, userId, publishLayout = null) {
   const storageKey = extractPublicImageStorageKey(rawUrl);
   if (!storageKey) return null;
   const match = storageKey.match(PUBLIC_IMAGE_STORAGE_KEY_PATTERN);
   if (!match || match[1] !== String(userId ?? '')) return null;
-  return buildPublicUrl(resolvePublicBaseUrl(), userId, `public/images/${match[2]}`);
+  return buildPublicUrl(resolvePublicBaseUrlFromLayout(publishLayout), userId, `public/images/${match[2]}`);
 }
 
 async function apiFetch(target, apiSecret, pathname, init = {}) {
@@ -491,7 +502,7 @@ function sanitizeOwnPublicHtmlUrl(publicUrl, owner, rawRelativePath, currentUser
   }
   return {
     ok: true,
-    url: canonicalizeStaticPageUrl(publicUrl, relativePath, canonicalRelativePath),
+    url: buildPublicUrl(resolvePublicBaseUrl(), owner, canonicalRelativePath),
   };
 }
 
@@ -698,6 +709,7 @@ export async function buildVisionPayload({
   localFetchAsset,
   llmProviderService,
   imgproxySigner = null,
+  fetchImpl = undiciFetch,
 }) {
   void imgproxySigner;
   if (!llmProviderService || !userId) return null;
@@ -730,7 +742,7 @@ export async function buildVisionPayload({
         return rawUrl;
       })();
       try {
-        const response = await undiciFetch(fetchableUrl);
+        const response = await fetchImpl(fetchableUrl);
         if (!response.ok) {
           throw new Error(`Vision fetch failed: ${response.status}`);
         }
@@ -752,7 +764,7 @@ export async function buildVisionPayload({
         const parsed = new URL(rawUrl);
         relativePath = parsed.pathname + parsed.search;
       } catch { /* keep rawUrl */ }
-      const publicStandardUrl = buildPublicStandardImageUrl(rawUrl, userId);
+      const publicStandardUrl = buildPublicStandardImageUrl(rawUrl, userId, publishLayout);
       imageItems.push({
         mimeType,
         data: buffer.toString('base64'),
@@ -1583,6 +1595,21 @@ export function createTkmindProxy({
             res.setHeader('X-TKMind-Degraded', '1');
           }
 
+          const directSessionIds = [...owned].filter(isDirectChatSessionId);
+          if (directSessionIds.length > 0 && sessionSnapshotService?.isEnabled?.()) {
+            for (const sessionId of directSessionIds) {
+              if (sessionsById.has(sessionId)) continue;
+              const snapshot = await sessionSnapshotService.get(sessionId).catch(() => null);
+              if (!snapshot?.session) continue;
+              sessionsById.set(sessionId, {
+                ...snapshot.session,
+                message_count: snapshot.meta?.synced_msg_count ?? snapshot.messages?.length ?? 0,
+                updated_at: snapshot.meta?.source_updated_at ?? snapshot.session.updated_at,
+                conversation: undefined,
+              });
+            }
+          }
+
           const sessions = [...sessionsById.values()].sort(sortSessionsByRecent);
           await enrichSessionHistory(sessions);
           if (typeof userAuth.getSessionOrigins === 'function' && sessions.length > 0) {
diff --git a/tkmind-proxy.test.mjs b/tkmind-proxy.test.mjs
index f0e6e16..26732af 100644
--- a/tkmind-proxy.test.mjs
+++ b/tkmind-proxy.test.mjs
@@ -189,6 +189,30 @@ test('sanitizePublicHtmlLinksInText keeps existing own public html links', () =>
   }
 });
 
+test('sanitizePublicHtmlLinksInText canonicalizes wrong MindSpace public hosts', () => {
+  const owner = `test-user-${Date.now()}-canonical-host`;
+  const previousBase = process.env.H5_PUBLIC_BASE_URL;
+  process.env.H5_PUBLIC_BASE_URL = 'http://127.0.0.1:5173';
+  const htmlPath = path.join(process.cwd(), 'MindSpace', owner, 'public', 'MIT-guide.html');
+  try {
+    fs.mkdirSync(path.dirname(htmlPath), { recursive: true });
+    fs.writeFileSync(htmlPath, '<!doctype html><title>MIT</title>');
+    const text =
+      `[下载页面](https://mindspace.tkmind.com/MindSpace/${owner}/public/MIT-guide.html)`;
+    const next = sanitizePublicHtmlLinksInText(text, { id: owner, username: 'john' });
+    assert.doesNotMatch(next, /mindspace\.tkmind\.com/);
+    assert.match(
+      next,
+      new RegExp(`http://127\\.0\\.0\\.1:5173/MindSpace/${owner}/public/MIT-guide\\.html`),
+    );
+    assert.doesNotMatch(next, /页面生成未完成/);
+  } finally {
+    if (previousBase == null) delete process.env.H5_PUBLIC_BASE_URL;
+    else process.env.H5_PUBLIC_BASE_URL = previousBase;
+    fs.rmSync(path.join(process.cwd(), 'MindSpace', owner), { recursive: true, force: true });
+  }
+});
+
 test('sanitizeSessionConversationPublicHtmlLinks updates text items inside conversation messages', () => {
   const owner = `test-user-${Date.now()}-conversation`;
   const publicRoot = path.join(process.cwd(), 'MindSpace', owner, 'public');
@@ -261,7 +285,7 @@ test('sanitizeSessionConversationPublicHtmlLinks removes internal user prompt no
 test('buildVisionPayload injects public standard image urls for page generation', async () => {
   const payload = await buildVisionPayload({
     userId: 'user-1',
-    publishLayout: { publicUrl: 'https://mm.tkmind.cn/MindSpace/user-1/' },
+    publishLayout: { publicUrl: 'https://m.tkmind.cn/MindSpace/user-1/' },
     userMessage: {
       content: [
         {
@@ -273,10 +297,15 @@ test('buildVisionPayload injects public standard image urls for page generation'
     llmProviderService: {
       analyzeImagesWithVision: async () => '图片里是一位成年人。',
     },
+    fetchImpl: async () => ({
+      ok: true,
+      arrayBuffer: async () => Buffer.from('fake-image'),
+      headers: new Map([['content-type', 'image/jpeg']]),
+    }),
   });
 
   const text = payload?.userMessage?.content?.[0]?.text ?? '';
-  assert.match(text, /https:\/\/mm\.tkmind\.cn\/MindSpace\/user-1\/public\/images\/2026-06-29\/hero\.jpg/);
+  assert.match(text, /https:\/\/m\.tkmind\.cn\/MindSpace\/user-1\/public\/images\/2026-06-29\/hero\.jpg/);
   assert.doesNotMatch(text, /plain\/local:\/\//);
   assert.match(text, /无需 cookie 的公开压缩标准图片/);
   assert.match(text, /不得改写图片里人物的年龄、性别、人数或主体关系/);
diff --git a/user-auth.mjs b/user-auth.mjs
index 5bb7ee7..423047b 100644
--- a/user-auth.mjs
+++ b/user-auth.mjs
@@ -2903,6 +2903,7 @@ export function createUserAuth(pool, options = {}) {
     updateUser,
     purchaseSpaceQuota,
     recharge,
+    getBillingState,
     billSessionUsage,
     listUsageRecords,
     listBillingLedger,