diff --git a/backend/.coverage b/backend/.coverage
new file mode 100644
index 0000000..0b7ab1a
Binary files /dev/null and b/backend/.coverage differ
diff --git a/backend/app/ai/providers/claude.py b/backend/app/ai/providers/claude.py
index 18a795e..d9a78c5 100644
--- a/backend/app/ai/providers/claude.py
+++ b/backend/app/ai/providers/claude.py
@@ -1,6 +1,5 @@
 from typing import Dict, Any, Optional
 import json
-from anthropic import AsyncAnthropic
 from app.ai.base import AIProvider
 
 
@@ -19,6 +18,13 @@ SYSTEM_PROMPTS = {
 
 class ClaudeProvider(AIProvider):
     def __init__(self, api_key: str, model: str = "claude-sonnet-4-20250514"):
+        try:
+            from anthropic import AsyncAnthropic
+        except ImportError:
+            raise ImportError(
+                "anthropic SDK is required for ClaudeProvider. "
+                "Install it with: pip install anthropic"
+            )
         self.client = AsyncAnthropic(api_key=api_key)
         self.model = model
         self._name = f"claude-sonnet"
diff --git a/backend/app/ai/providers/openai.py b/backend/app/ai/providers/openai.py
index 52ae6fa..e166330 100644
--- a/backend/app/ai/providers/openai.py
+++ b/backend/app/ai/providers/openai.py
@@ -1,6 +1,5 @@
 from typing import Dict, Any, Optional
 import json
-from openai import AsyncOpenAI
 from app.ai.base import AIProvider
 
 
@@ -20,6 +19,13 @@ SYSTEM_PROMPTS = {
 
 class OpenAIProvider(AIProvider):
     def __init__(self, api_key: str, model: str = "gpt-4o", base_url: Optional[str] = None):
+        try:
+            from openai import AsyncOpenAI
+        except ImportError:
+            raise ImportError(
+                "openai>=1.0 is required for OpenAIProvider. "
+                "Install it with: pip install 'openai>=1.0'"
+            )
         kwargs = {"api_key": api_key}
         if base_url:
             kwargs["base_url"] = base_url
diff --git a/backend/app/ai/providers/spark.py b/backend/app/ai/providers/spark.py
index 0a7b113..2ec0384 100644
--- a/backend/app/ai/providers/spark.py
+++ b/backend/app/ai/providers/spark.py
@@ -1,6 +1,5 @@
 from typing import Dict, Any, Optional
 import json
-from openai import AsyncOpenAI
 from app.ai.base import AIProvider
 
 
@@ -18,6 +17,10 @@ SYSTEM_PROMPTS = {
 class SparkProvider(AIProvider):
     def __init__(self, api_key: str, model: str = "astron-code-latest", base_url: str = None):
         from app.config import settings
+        try:
+            from openai import AsyncOpenAI
+        except ImportError:
+            raise ImportError("openai>=1.0 is required for SparkProvider")
         self.client = AsyncOpenAI(
             api_key=api_key,
             base_url=base_url or settings.IFLYTEK_API_BASE,
diff --git a/backend/app/api/v1/admin.py b/backend/app/api/v1/admin.py
index e81623d..09492ca 100644
--- a/backend/app/api/v1/admin.py
+++ b/backend/app/api/v1/admin.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from app.database import get_db
 from app.services.admin import AdminService
 from app.api.v1.deps import get_current_user
@@ -17,7 +16,7 @@ async def require_admin(current_user: dict = Depends(get_current_user)) -> dict:
 @router.get("/dashboard")
 async def get_dashboard(
     _: dict = Depends(require_admin),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AdminService(db)
     return await service.get_dashboard()
@@ -28,7 +27,7 @@ async def list_users(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     _: dict = Depends(require_admin),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AdminService(db)
     return await service.list_users(page, size)
@@ -39,7 +38,7 @@ async def update_user_tier(
     target_user_id: str,
     data: dict,
     _: dict = Depends(require_admin),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AdminService(db)
     tier = data.get("tier")
@@ -55,7 +54,7 @@ async def update_user_tier(
 async def toggle_user_active(
     target_user_id: str,
     _: dict = Depends(require_admin),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AdminService(db)
     success = await service.toggle_user_active(target_user_id)
@@ -66,7 +65,7 @@ async def toggle_user_active(
 
 @router.get("/health")
 async def system_health(
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AdminService(db)
     return await service.get_system_health()
diff --git a/backend/app/api/v1/analytics.py b/backend/app/api/v1/analytics.py
index 4fe689f..b7e3630 100644
--- a/backend/app/api/v1/analytics.py
+++ b/backend/app/api/v1/analytics.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from app.database import get_db
 from app.services.analytics import AnalyticsService
 from app.api.v1.deps import get_current_user_id
@@ -11,7 +10,7 @@ router = APIRouter()
 @router.get("/customers")
 async def customer_analytics(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     return await service.get_customer_stats(user_id)
@@ -20,7 +19,7 @@ async def customer_analytics(
 @router.get("/translations")
 async def translation_analytics(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     return await service.get_translation_stats(user_id)
@@ -29,7 +28,7 @@ async def translation_analytics(
 @router.get("/quotations")
 async def quotation_analytics(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     return await service.get_quotation_stats(user_id)
@@ -38,7 +37,7 @@ async def quotation_analytics(
 @router.get("/messages")
 async def message_analytics(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     return await service.get_message_stats(user_id)
@@ -47,7 +46,7 @@ async def message_analytics(
 @router.get("/overview")
 async def overview(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     customers = await service.get_customer_stats(user_id)
@@ -67,7 +66,7 @@ async def overview(
 @router.get("/marketing")
 async def marketing_analytics(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = AnalyticsService(db)
     return await service.get_marketing_stats(user_id)
diff --git a/backend/app/api/v1/auth.py b/backend/app/api/v1/auth.py
index 452e659..0a14497 100644
--- a/backend/app/api/v1/auth.py
+++ b/backend/app/api/v1/auth.py
@@ -2,7 +2,7 @@ from fastapi import APIRouter, Depends, HTTPException, status, Header
 from fastapi.security import OAuth2PasswordRequestForm
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select
-from typing import Annotated, Optional
+from typing import Optional
 import uuid
 from app.database import get_db
 from app.models.user import User
@@ -31,7 +31,7 @@ class RefreshRequest(BaseModel):
 
 
 @router.post("/register")
-async def register(data: RegisterRequest, db: Annotated[AsyncSession, Depends(get_db)] = None):
+async def register(data: RegisterRequest, db: AsyncSession = Depends(get_db)):
     existing = await db.execute(select(User).where(User.phone == data.phone))
     if existing.scalar_one_or_none():
         raise HTTPException(status_code=400, detail="Phone already registered")
@@ -56,8 +56,8 @@ async def register(data: RegisterRequest, db: Annotated[AsyncSession, Depends(ge
 
 @router.post("/login", response_model=LoginResponse)
 async def login(
-    form: Annotated[OAuth2PasswordRequestForm, Depends()],
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    form: OAuth2PasswordRequestForm = Depends(),
+    db: AsyncSession = Depends(get_db),
 ):
     result = await db.execute(select(User).where(User.phone == form.username))
     user = result.scalar_one_or_none()
@@ -128,7 +128,7 @@ async def refresh(data: RefreshRequest):
 @router.get("/me")
 async def get_me(
     authorization: Optional[str] = Header(None, alias="Authorization"),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     if not authorization or not authorization.startswith("Bearer "):
         raise HTTPException(status_code=401, detail="Missing token")
@@ -178,8 +178,17 @@ class WeChatLoginRequest(BaseModel):
     iv: str = ""
 
 
+@router.get("/wechat/config")
+async def wechat_config():
+    from app.config import settings
+    return {
+        "available": bool(settings.WECHAT_APP_ID and settings.WECHAT_APP_SECRET),
+        "app_id": settings.WECHAT_APP_ID or "",
+    }
+
+
 @router.post("/wechat-login")
-async def wechat_login(data: WeChatLoginRequest, db: Annotated[AsyncSession, Depends(get_db)] = None):
+async def wechat_login(data: WeChatLoginRequest, db: AsyncSession = Depends(get_db)):
     from app.services.wechat import wechat_service
 
     session = await wechat_service.code2session(data.code)
@@ -216,7 +225,7 @@ async def wechat_login(data: WeChatLoginRequest, db: Annotated[AsyncSession, Dep
 async def update_settings(
     data: SettingsUpdate,
     authorization: Optional[str] = Header(None, alias="Authorization"),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     if not authorization or not authorization.startswith("Bearer "):
         raise HTTPException(status_code=401, detail="Missing token")
diff --git a/backend/app/api/v1/customer.py b/backend/app/api/v1/customer.py
index 79a430a..acf08e2 100644
--- a/backend/app/api/v1/customer.py
+++ b/backend/app/api/v1/customer.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query, UploadFile, File, Response
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional, List
+from typing import Optional, List
 from app.database import get_db
 from app.services.customer import CustomerService
 from app.services.customer_health import CustomerHealthService
@@ -18,7 +18,7 @@ async def list_customers(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     return await service.list_customers(user_id, status, page, size)
@@ -28,7 +28,7 @@ async def list_customers(
 async def get_silent(
     days: int = Query(3, ge=1),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     customers = await service.get_silent_customers(user_id, days)
@@ -43,7 +43,7 @@ async def get_silent(
 async def get_customer(
     customer_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     customer = await service.get_customer(user_id, customer_id)
@@ -56,7 +56,7 @@ async def get_customer(
 async def create_customer(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     customer = await service.create_customer(user_id, data)
@@ -68,7 +68,7 @@ async def update_customer(
     customer_id: str,
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     customer = await service.update_customer(user_id, customer_id, data)
@@ -81,7 +81,7 @@ async def update_customer(
 async def delete_customer(
     customer_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     deleted = await service.delete_customer(user_id, customer_id)
@@ -94,7 +94,7 @@ async def delete_customer(
 async def import_customers(
     file: UploadFile = File(...),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     from app.workers.tasks import process_customer_import
 
@@ -135,7 +135,7 @@ async def import_customers(
 async def export_customers(
     status: Optional[str] = None,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     result = await service.list_customers(user_id, status, 1, 9999)
@@ -151,7 +151,7 @@ async def export_customers(
 @router.get("/health-overview")
 async def get_health_overview(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerHealthService(db)
     return await service.get_health_overview(user_id)
@@ -160,7 +160,7 @@ async def get_health_overview(
 @router.get("/health-scores")
 async def get_all_health_scores(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerHealthService(db)
     return {"items": await service.get_all_health_scores(user_id)}
@@ -170,7 +170,7 @@ async def get_all_health_scores(
 async def get_customer_health(
     customer_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerHealthService(db)
     health = await service.get_customer_health(user_id, customer_id)
@@ -185,7 +185,7 @@ async def get_conversation(
     page: int = Query(1, ge=1),
     size: int = Query(50, ge=1, le=200),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = CustomerService(db)
     return await service.get_conversation(user_id, customer_id, page, size)
diff --git a/backend/app/api/v1/feedback.py b/backend/app/api/v1/feedback.py
index 63f2b66..fa81b32 100644
--- a/backend/app/api/v1/feedback.py
+++ b/backend/app/api/v1/feedback.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from pydantic import BaseModel
 from app.database import get_db
 from app.models.feedback import Feedback
@@ -19,7 +18,7 @@ class FeedbackRequest(BaseModel):
 async def submit_feedback(
     data: FeedbackRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     if not data.content.strip():
         raise HTTPException(status_code=400, detail="Content is required")
diff --git a/backend/app/api/v1/followup.py b/backend/app/api/v1/followup.py
index 43a8af4..09ac3c4 100644
--- a/backend/app/api/v1/followup.py
+++ b/backend/app/api/v1/followup.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from app.database import get_db
 from app.services.followup_engine import FollowupEngine
 from app.api.v1.deps import get_current_user_id
@@ -11,7 +11,7 @@ router = APIRouter()
 @router.get("/strategies")
 async def list_strategies(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     await engine.ensure_default_strategies()
@@ -23,7 +23,7 @@ async def get_pending_followups(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     return await engine.get_pending_followups(user_id, page, size)
@@ -34,7 +34,7 @@ async def get_followup_logs(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     return await engine.get_followup_logs(user_id, page, size)
@@ -44,7 +44,7 @@ async def get_followup_logs(
 async def mark_followup_sent(
     log_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     success = await engine.mark_sent(user_id, log_id)
@@ -58,7 +58,7 @@ async def edit_and_send_followup(
     log_id: str,
     body: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     edited_text = body.get("edited_text", "")
     if not edited_text:
@@ -73,7 +73,7 @@ async def edit_and_send_followup(
 @router.get("/stats")
 async def get_followup_stats(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     return await engine.get_stats(user_id)
@@ -82,7 +82,7 @@ async def get_followup_stats(
 @router.post("/scan")
 async def trigger_followup_scan(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     engine = FollowupEngine(db)
     result = await engine.scan_and_followup()
diff --git a/backend/app/api/v1/interaction.py b/backend/app/api/v1/interaction.py
index 9bbb7f7..68cee9f 100644
--- a/backend/app/api/v1/interaction.py
+++ b/backend/app/api/v1/interaction.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from app.database import get_db
 from app.services.preference import UserPreferenceService
 from app.services.marketing_effect import MarketingEffectService
@@ -13,7 +12,7 @@ router = APIRouter()
 async def record_selection(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     message_id = data.get("message_id")
     selected_index = data.get("selected_index")
@@ -30,7 +29,7 @@ async def record_selection(
 async def record_edit(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     message_id = data.get("message_id")
     edited_text = data.get("edited_text")
@@ -46,7 +45,7 @@ async def record_edit(
 @router.post("/analyze")
 async def analyze_preferences(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = UserPreferenceService(db)
     preferences = await service.analyze_preferences(user_id)
@@ -56,7 +55,7 @@ async def analyze_preferences(
 @router.get("/preferences")
 async def get_preferences(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = UserPreferenceService(db)
     return await service.get_analysis(user_id)
@@ -66,7 +65,7 @@ async def get_preferences(
 async def track_marketing_effect(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = MarketingEffectService(db)
     result = await service.track_event(
@@ -87,7 +86,7 @@ async def get_marketing_effects(
     page: int = 1,
     size: int = 20,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = MarketingEffectService(db)
     return await service.get_effects(user_id, page, size)
@@ -96,7 +95,7 @@ async def get_marketing_effects(
 @router.get("/marketing-effects/stats")
 async def get_marketing_effect_stats(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = MarketingEffectService(db)
     return await service.get_stats(user_id)
diff --git a/backend/app/api/v1/marketing.py b/backend/app/api/v1/marketing.py
index 71325ce..3727a4a 100644
--- a/backend/app/api/v1/marketing.py
+++ b/backend/app/api/v1/marketing.py
@@ -1,5 +1,5 @@
 from fastapi import APIRouter, HTTPException, Depends
-from typing import Optional, Annotated
+from typing import Optional
 from pydantic import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
 from app.database import get_db
@@ -43,7 +43,7 @@ class CompetitorRequest(BaseModel):
 async def generate_marketing(
     data: MarketingRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = MarketingService()
     pref_service = UserPreferenceService(db)
diff --git a/backend/app/api/v1/notification.py b/backend/app/api/v1/notification.py
index 472c5f4..750efb1 100644
--- a/backend/app/api/v1/notification.py
+++ b/backend/app/api/v1/notification.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from app.database import get_db
 from app.services.notification import NotificationService
 from app.api.v1.deps import get_current_user_id
@@ -14,7 +14,7 @@ async def list_notifications(
     size: int = Query(20, ge=1, le=100),
     unread_only: bool = Query(False),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = NotificationService(db)
     return await service.list_notifications(user_id, page, size, unread_only)
@@ -23,7 +23,7 @@ async def list_notifications(
 @router.get("/unread-count")
 async def unread_count(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = NotificationService(db)
     count = await service.get_unread_count(user_id)
@@ -34,7 +34,7 @@ async def unread_count(
 async def mark_read(
     notification_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = NotificationService(db)
     success = await service.mark_read(user_id, notification_id)
@@ -46,7 +46,7 @@ async def mark_read(
 @router.post("/read-all")
 async def mark_all_read(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = NotificationService(db)
     count = await service.mark_all_read(user_id)
@@ -57,7 +57,7 @@ async def mark_all_read(
 async def delete_notification(
     notification_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = NotificationService(db)
     success = await service.delete_notification(user_id, notification_id)
diff --git a/backend/app/api/v1/onboarding.py b/backend/app/api/v1/onboarding.py
index d7fe064..65643ff 100644
--- a/backend/app/api/v1/onboarding.py
+++ b/backend/app/api/v1/onboarding.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.onboarding import OnboardingService
@@ -19,7 +18,7 @@ class OnboardingRequest(BaseModel):
 @router.get("/status")
 async def get_status(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = OnboardingService(db)
     return await service.check_status(user_id)
@@ -29,7 +28,7 @@ async def get_status(
 async def create_first_product(
     data: OnboardingRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     if not data.name.strip():
         raise HTTPException(status_code=400, detail="Product name is required")
diff --git a/backend/app/api/v1/payment.py b/backend/app/api/v1/payment.py
index c4915d0..b0dc63e 100644
--- a/backend/app/api/v1/payment.py
+++ b/backend/app/api/v1/payment.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.payment import PaymentService
@@ -27,7 +26,7 @@ async def get_plans():
 @router.get("/subscription")
 async def get_subscription(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     svc = PaymentService(db)
     return await svc.get_current_subscription(user_id)
@@ -37,7 +36,7 @@ async def get_subscription(
 async def create_order(
     data: CreateOrderRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     svc = PaymentService(db)
     try:
@@ -49,7 +48,7 @@ async def create_order(
 @router.post("/callback")
 async def payment_callback(
     data: PaymentCallbackRequest,
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     svc = PaymentService(db)
     success = await svc.handle_payment_callback(data.payment_id, data.success)
diff --git a/backend/app/api/v1/product.py b/backend/app/api/v1/product.py
index f12e8d2..2b2a1bc 100644
--- a/backend/app/api/v1/product.py
+++ b/backend/app/api/v1/product.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from app.database import get_db
 from app.services.product import ProductService
 from app.api.v1.deps import get_current_user_id
@@ -44,7 +44,7 @@ async def list_products(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = ProductService(db)
     return await service.list_products(user_id, category, page, size)
@@ -54,7 +54,7 @@ async def list_products(
 async def get_product(
     product_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = ProductService(db)
     product = await service.get_product(user_id, product_id)
@@ -67,7 +67,7 @@ async def get_product(
 async def create_product(
     data: ProductCreate,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = ProductService(db)
     product = await service.create_product(user_id, data.dict())
@@ -79,7 +79,7 @@ async def update_product(
     product_id: str,
     data: ProductUpdate,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = ProductService(db)
     product = await service.update_product(user_id, product_id, data.dict(exclude_unset=True))
@@ -92,7 +92,7 @@ async def update_product(
 async def delete_product(
     product_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = ProductService(db)
     deleted = await service.delete_product(user_id, product_id)
diff --git a/backend/app/api/v1/push.py b/backend/app/api/v1/push.py
index b8f3be7..6f19ff0 100644
--- a/backend/app/api/v1/push.py
+++ b/backend/app/api/v1/push.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.push import PushService
@@ -20,7 +20,7 @@ class DeviceRegisterRequest(BaseModel):
 async def register_device(
     data: DeviceRegisterRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = PushService(db)
     device = await service.register_device(
@@ -41,7 +41,7 @@ async def register_device(
 async def unregister_device(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     client_id = data.get("client_id")
     if not client_id:
@@ -56,7 +56,7 @@ async def unregister_device(
 @router.get("/devices")
 async def list_devices(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = PushService(db)
     devices = await service.get_user_devices(user_id)
diff --git a/backend/app/api/v1/quotation.py b/backend/app/api/v1/quotation.py
index f006789..9e63ccb 100644
--- a/backend/app/api/v1/quotation.py
+++ b/backend/app/api/v1/quotation.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query, Response
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.quotation import QuotationService
@@ -23,7 +23,7 @@ class InquiryRequest(BaseModel):
 async def generate_from_inquiry(
     data: InquiryRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     result = await service.generate_from_inquiry(
@@ -38,7 +38,7 @@ async def generate_from_inquiry(
 async def create_quotation(
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     try:
@@ -53,7 +53,7 @@ async def list_quotations(
     page: int = Query(1, ge=1),
     size: int = Query(20, ge=1, le=100),
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     return await service.list_quotations(user_id, page, size)
@@ -63,7 +63,7 @@ async def list_quotations(
 async def get_quotation(
     quotation_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     quotation = await service.get_quotation(user_id, quotation_id)
@@ -77,7 +77,7 @@ async def update_quotation_status(
     quotation_id: str,
     data: dict,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     quotation = await service.update_status(user_id, quotation_id, data.get("status", "draft"))
@@ -89,7 +89,7 @@ async def update_quotation_status(
 @router.get("/export/csv")
 async def export_quotations(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     result = await service.list_quotations(user_id, 1, 9999)
@@ -106,7 +106,7 @@ async def export_quotations(
 async def export_quotation_pdf(
     quotation_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = QuotationService(db)
     quotation = await service.get_quotation(user_id, quotation_id)
diff --git a/backend/app/api/v1/silent_pattern.py b/backend/app/api/v1/silent_pattern.py
index 6b50856..291c926 100644
--- a/backend/app/api/v1/silent_pattern.py
+++ b/backend/app/api/v1/silent_pattern.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends, HTTPException
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from app.database import get_db
 from app.services.silent_pattern import SilentPatternService
 from app.api.v1.deps import get_current_user_id
@@ -11,7 +10,7 @@ router = APIRouter()
 @router.get("/risk-analysis")
 async def get_silent_risk_analysis(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = SilentPatternService(db)
     risks = await service.analyze_silent_risk(user_id)
@@ -27,7 +26,7 @@ async def get_silent_risk_analysis(
 async def get_followup_suggestions(
     customer_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = SilentPatternService(db)
     suggestions = await service.get_suggestions(user_id, customer_id)
diff --git a/backend/app/api/v1/teams.py b/backend/app/api/v1/teams.py
index c92698f..5f2f273 100644
--- a/backend/app/api/v1/teams.py
+++ b/backend/app/api/v1/teams.py
@@ -1,6 +1,6 @@
 from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated, Optional
+from typing import Optional
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.team import TeamService
@@ -26,7 +26,7 @@ class UpdateRoleRequest(BaseModel):
 async def create_team(
     data: CreateTeamRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     try:
@@ -39,7 +39,7 @@ async def create_team(
 @router.get("")
 async def list_teams(
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     return {"teams": await service.list_user_teams(user_id)}
@@ -49,7 +49,7 @@ async def list_teams(
 async def get_team(
     team_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     team = await service.get_team(team_id, user_id)
@@ -63,7 +63,7 @@ async def invite_member(
     team_id: str,
     data: InviteRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     try:
@@ -78,7 +78,7 @@ async def remove_member(
     team_id: str,
     member_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     success = await service.remove_member(team_id, user_id, member_id)
@@ -91,7 +91,7 @@ async def remove_member(
 async def leave_team(
     team_id: str,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     success = await service.leave_team(team_id, user_id)
@@ -106,7 +106,7 @@ async def update_member_role(
     member_id: str,
     data: UpdateRoleRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     service = TeamService(db)
     if data.role not in ("admin", "member", "viewer"):
diff --git a/backend/app/api/v1/training.py b/backend/app/api/v1/training.py
index fe116a5..ce00d1b 100644
--- a/backend/app/api/v1/training.py
+++ b/backend/app/api/v1/training.py
@@ -1,6 +1,5 @@
 from fastapi import APIRouter, Depends
 from sqlalchemy.ext.asyncio import AsyncSession
-from typing import Annotated
 from app.database import get_db
 from app.services.corpus_trainer import CorpusTrainer
 from app.api.v1.deps import get_current_user_id
@@ -10,7 +9,7 @@ router = APIRouter()
 
 @router.post("/corpus/run")
 async def run_corpus_training(
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     trainer = CorpusTrainer(db)
     result = await trainer.run_pipeline()
@@ -20,7 +19,7 @@ async def run_corpus_training(
 @router.post("/corpus/embeddings")
 async def compute_embeddings(
     batch_size: int = 50,
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     trainer = CorpusTrainer(db)
     result = await trainer.compute_embeddings(batch_size)
@@ -29,7 +28,7 @@ async def compute_embeddings(
 
 @router.get("/corpus/stats")
 async def corpus_stats(
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     trainer = CorpusTrainer(db)
     return await trainer.get_stats()
@@ -37,7 +36,7 @@ async def corpus_stats(
 
 @router.post("/corpus/deduplicate")
 async def deduplicate_corpus(
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     trainer = CorpusTrainer(db)
     result = await trainer.deduplicate()
diff --git a/backend/app/api/v1/translate.py b/backend/app/api/v1/translate.py
index 30a7c16..774459b 100644
--- a/backend/app/api/v1/translate.py
+++ b/backend/app/api/v1/translate.py
@@ -1,5 +1,5 @@
 from fastapi import APIRouter, HTTPException, Response, Depends
-from typing import Optional, Dict, Any, Annotated
+from typing import Optional, Dict, Any
 from pydantic import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
 from app.database import get_db
@@ -51,7 +51,7 @@ async def translate_text(
 async def generate_reply(
     data: ReplyRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     pref_service = UserPreferenceService(db)
     pref_context = await pref_service.get_preference_context(user_id, "reply")
diff --git a/backend/app/api/v1/whatsapp.py b/backend/app/api/v1/whatsapp.py
index 94ba188..e86d1a6 100644
--- a/backend/app/api/v1/whatsapp.py
+++ b/backend/app/api/v1/whatsapp.py
@@ -1,7 +1,7 @@
 from fastapi import APIRouter, Request, HTTPException, Depends, Header
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy import select, and_
-from typing import Annotated, Optional
+from typing import Optional
 from pydantic import BaseModel
 from app.database import get_db
 from app.services.whatsapp import WhatsAppService
@@ -30,7 +30,7 @@ async def verify_webhook(
 async def handle_webhook(
     request: Request,
     x_hub_signature_256: Optional[str] = Header(None),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     svc = WhatsAppService()
     body = await request.body()
@@ -80,7 +80,7 @@ class SendMessageRequest(BaseModel):
 async def send_message(
     data: SendMessageRequest,
     user_id: str = Depends(get_current_user_id),
-    db: Annotated[AsyncSession, Depends(get_db)] = None,
+    db: AsyncSession = Depends(get_db),
 ):
     svc = WhatsAppService()
 
diff --git a/uni-app/src/pages/customers/customers.vue b/uni-app/src/pages/customers/customers.vue
index c24b984..1a1ecda 100644
--- a/uni-app/src/pages/customers/customers.vue
+++ b/uni-app/src/pages/customers/customers.vue
@@ -796,7 +796,7 @@ const deleteCustomer = async (id) => {
 .bottom-actions {
   position: fixed;
   right: 40rpx;
-  bottom: 40rpx;
+  bottom: 100px;
   display: flex;
   flex-direction: column;
   gap: 24rpx;
diff --git a/uni-app/src/pages/index/index.vue b/uni-app/src/pages/index/index.vue
index bac32d3..e403842 100644
--- a/uni-app/src/pages/index/index.vue
+++ b/uni-app/src/pages/index/index.vue
@@ -5,7 +5,11 @@
         <text class="username">{{ userInfo?.username || '用户' }}</text>
         <text class="tier">{{ userInfo?.tier === 'pro' ? 'Pro' : '免费版' }}</text>
       </view>
-      <view class="guest-info" v-else>
+      <view class="header-left" v-if="!hasLogin" @click="showAnnouncement = true">
+        <text class="announcement-icon">📢</text>
+        <text class="announcement-ticker">{{ announcements[currentAnnouncement] }}</text>
+      </view>
+      <view class="header-right" v-if="!hasLogin">
         <text class="guest-label">👋 游客模式</text>
         <button class="login-btn" @click="goToLogin">登录</button>
       </view>
@@ -58,7 +62,10 @@
         <view class="try-result" v-if="tryResult">
           <view class="result-header">
             <text class="result-label">翻译结果</text>
-            <text class="result-copy" @click="copyTryResult">复制</text>
+            <view class="result-actions">
+              <text class="result-play" @click="playTryResult">朗读</text>
+              <text class="result-copy" @click="copyTryResult">复制</text>
+            </view>
           </view>
           <view class="result-content">
             <text class="result-text">{{ tryResult }}</text>
@@ -92,39 +99,6 @@
       <view class="empty" v-else>暂无待跟进客户</view>
     </view>
 
-    <view class="quick-actions">
-      <view class="action-item" @click="hasLogin ? goToPage('/pages/product/product') : goToLogin()">
-        <view class="action-icon-wrap" style="background:#e6f7ff">
-          <text class="action-icon-text" style="color:#1890ff">品</text>
-        </view>
-        <text class="action-label">产品库</text>
-      </view>
-      <view class="action-item" @click="hasLogin ? goToPage('/pages/followup/followup') : goToLogin()">
-        <view class="action-icon-wrap" style="background:#f0f0ff">
-          <text class="action-icon-text" style="color:#667eea">跟</text>
-        </view>
-        <text class="action-label">
-          <text>跟进</text>
-          <text class="action-badge" v-if="hasLogin && followupStats.pending > 0">{{ followupStats.pending > 99 ? '99+' : followupStats.pending }}</text>
-        </text>
-      </view>
-      <view class="action-item" @click="hasLogin ? goToPage('/pages/analytics/analytics') : goToLogin()">
-        <view class="action-icon-wrap" style="background:#f6ffed">
-          <text class="action-icon-text" style="color:#52c41a">数</text>
-        </view>
-        <text class="action-label">数据</text>
-      </view>
-      <view class="action-item" @click="hasLogin ? goToPage('/pages/notification/notification') : goToLogin()">
-        <view class="action-icon-wrap" style="background:#fff7e6">
-          <text class="action-icon-text" style="color:#fa8c16">知</text>
-        </view>
-        <text class="action-label">
-          <text>通知</text>
-          <text class="action-badge" v-if="hasLogin && unreadCount > 0">{{ unreadCount > 99 ? '99+' : unreadCount }}</text>
-        </text>
-      </view>
-    </view>
-
     <view class="section" v-if="hasLogin && followupStats.pending > 0">
       <view class="section-title">
         <text>待跟进提醒</text>
@@ -138,7 +112,7 @@
     </view>
 
     <view class="more-section">
-      <view class="section-title">更多功能</view>
+      <view class="section-title">功能矩阵</view>
       <view class="more-grid">
         <view class="more-item" @click="hasLogin ? goToPage('/pages/product/product') : goToLogin()">
           <text class="more-icon">📦</text>
@@ -221,15 +195,39 @@
         <text class="ob-skip" @click="finishOnboarding" v-if="onboardingStep === 1">跳过，以后再说</text>
       </view>
     </view>
+
+    <view class="modal-overlay" v-if="showAnnouncement" @click="showAnnouncement = false">
+      <view class="announcement-modal" @click.stop>
+        <text class="announcement-title">📢 系统公告</text>
+        <view class="announcement-body">
+          <text class="announcement-line">欢迎使用外贸小助手！</text>
+          <text class="announcement-line">登录后可解锁以下功能：</text>
+          <text class="announcement-item">• 客户管理 — 管理客户信息与跟进记录</text>
+          <text class="announcement-item">• 报价单 — 快速生成并导出专业报价</text>
+          <text class="announcement-item">• 数据分析 — 查看业务统计与趋势</text>
+          <text class="announcement-item">• 营销素材 — AI 生成营销文案与关键词</text>
+          <text class="announcement-line" style="margin-top: 20rpx">现在登录体验全部功能 🚀</text>
+        </view>
+        <button class="announcement-btn" @click="showAnnouncement = false; goToLogin()">去登录</button>
+      </view>
+    </view>
   </view>
 </template>
 
 <script setup>
-import { ref, computed } from 'vue'
+import { ref, computed, onUnmounted } from 'vue'
 import { onShow } from '@dcloudio/uni-app'
-import { authApi, customerApi, analyticsApi, onboardingApi, notificationApi, followupApi, translateApi } from '@/utils/api.js'
+import { authApi, customerApi, analyticsApi, onboardingApi, notificationApi, followupApi, translateApi, BASE_URL } from '@/utils/api.js'
+
+const showAnnouncement = ref(false)
+const currentAnnouncement = ref(0)
+const announcements = [
+  '全新 AI 翻译引擎上线，支持多语言商务翻译',
+  '登录后免费使用客户管理与报价单功能',
+  '每日数据看板上线，实时掌握业务动态',
+]
+let announcementTimer = null
 
-const userInfo = ref(null)
 const hasLogin = computed(() => {
   const token = uni.getStorageSync('token')
   const isGuest = uni.getStorageSync('isGuest')
@@ -257,6 +255,10 @@ const tryExtracted = ref('')
 const tryLoading = ref(false)
 
 onShow(() => {
+  announcementTimer = setInterval(() => {
+    currentAnnouncement.value = (currentAnnouncement.value + 1) % announcements.length
+  }, 4000)
+
   const token = uni.getStorageSync('token')
   const isGuest = uni.getStorageSync('isGuest')
   if (token && !isGuest) {
@@ -272,6 +274,10 @@ onShow(() => {
   }
 })
 
+onUnmounted(() => {
+  if (announcementTimer) clearInterval(announcementTimer)
+})
+
 const checkOnboarding = async () => {
   if (uni.getStorageSync('onboarded')) return
   try {
@@ -435,6 +441,35 @@ const copyTryResult = () => {
     },
   })
 }
+
+const playTryResult = () => {
+  if (!tryResult.value || !tryText.value) return
+  const hasChinese = /[\u4e00-\u9fa5]/.test(tryText.value)
+  const lang = hasChinese ? 'en' : 'zh'
+  const token = uni.getStorageSync('token')
+  const url = `${BASE_URL}/translate/tts?text=${encodeURIComponent(tryResult.value)}&lang=${lang}`
+
+  uni.showLoading({ title: '语音生成中...' })
+  uni.downloadFile({
+    url,
+    header: token ? { Authorization: `Bearer ${token}` } : {},
+    success: (res) => {
+      uni.hideLoading()
+      if (res.statusCode === 200) {
+        const audioCtx = uni.createInnerAudioContext()
+        audioCtx.src = res.tempFilePath
+        audioCtx.play()
+        audioCtx.onEnded(() => audioCtx.destroy())
+      } else {
+        uni.showToast({ title: '语音生成失败', icon: 'none' })
+      }
+    },
+    fail: () => {
+      uni.hideLoading()
+      uni.showToast({ title: '语音生成失败', icon: 'none' })
+    },
+  })
+}
 </script>
 
 <style lang="scss" scoped>
@@ -460,15 +495,39 @@ const copyTryResult = () => {
   align-items: center;
 }
 
-.guest-info {
+.header-left {
   display: flex;
   align-items: center;
-  gap: 16rpx;
+  gap: 12rpx;
+  flex: 1;
+  cursor: pointer;
+  overflow: hidden;
+}
+
+.announcement-icon {
+  font-size: 32rpx;
+  flex-shrink: 0;
+}
+
+.announcement-ticker {
+  font-size: 24rpx;
+  color: rgba(255, 255, 255, 0.9);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.header-right {
+  display: flex;
+  align-items: center;
+  gap: 12rpx;
+  flex-shrink: 0;
 }
 
 .guest-label {
   font-size: 28rpx;
   color: rgba(255, 255, 255, 0.9);
+  white-space: nowrap;
 }
 
 .login-btn {
@@ -654,11 +713,21 @@ const copyTryResult = () => {
   font-weight: 500;
 }
 
+.result-actions {
+  display: flex;
+  gap: 16rpx;
+}
+
 .result-copy {
   font-size: 24rpx;
   color: #1890ff;
 }
 
+.result-play {
+  font-size: 24rpx;
+  color: #52c41a;
+}
+
 .result-content, .extracted-content {
   background: #fff;
   border-radius: 8rpx;
@@ -759,57 +828,6 @@ const copyTryResult = () => {
   margin-top: 12rpx;
 }
 
-.quick-actions {
-  display: flex;
-  background: #fff;
-  border-radius: 16rpx;
-  padding: 20rpx 16rpx;
-  margin-bottom: 20rpx;
-  justify-content: space-around;
-}
-
-.action-item {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  gap: 8rpx;
-  cursor: pointer;
-}
-
-.action-icon-wrap {
-  width: 72rpx;
-  height: 72rpx;
-  border-radius: 36rpx;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-}
-
-.action-icon-text {
-  font-size: 30rpx;
-  font-weight: bold;
-}
-
-.action-label {
-  font-size: 22rpx;
-  color: #666;
-  display: flex;
-  align-items: center;
-  gap: 4rpx;
-}
-
-.action-badge {
-  background: #ff4d4f;
-  color: #fff;
-  font-size: 18rpx;
-  min-width: 28rpx;
-  height: 28rpx;
-  border-radius: 14rpx;
-  text-align: center;
-  line-height: 28rpx;
-  padding: 0 6rpx;
-}
-
 .more-section {
   background: #fff;
   border-radius: 16rpx;
@@ -887,4 +905,60 @@ const copyTryResult = () => {
 .ob-btn { width: 100%; height: 88rpx; border-radius: 12rpx; font-size: 30rpx; border: none; display: flex; align-items: center; justify-content: center; }
 .ob-btn-primary { background: #1890ff; color: #fff; }
 .ob-skip { display: block; text-align: center; margin-top: 24rpx; font-size: 24rpx; color: #999; }
+
+.modal-overlay {
+  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
+  background: rgba(0,0,0,0.5);
+  display: flex; align-items: center; justify-content: center;
+  z-index: 999; padding: 40rpx;
+}
+
+.announcement-modal {
+  background: #fff;
+  border-radius: 24rpx;
+  padding: 48rpx 40rpx;
+  width: 100%;
+  max-width: 560rpx;
+}
+
+.announcement-title {
+  font-size: 34rpx;
+  font-weight: 700;
+  color: #333;
+  display: block;
+  text-align: center;
+  margin-bottom: 32rpx;
+}
+
+.announcement-body {
+  margin-bottom: 32rpx;
+}
+
+.announcement-line {
+  font-size: 26rpx;
+  color: #555;
+  display: block;
+  line-height: 1.6;
+  margin-bottom: 8rpx;
+}
+
+.announcement-item {
+  font-size: 24rpx;
+  color: #666;
+  display: block;
+  line-height: 1.8;
+  padding-left: 20rpx;
+}
+
+.announcement-btn {
+  width: 100%;
+  height: 88rpx;
+  background: #1890ff;
+  color: #fff;
+  border-radius: 12rpx;
+  font-size: 30rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
 </style>
diff --git a/uni-app/src/pages/login/login.vue b/uni-app/src/pages/login/login.vue
index 20981e1..8fdfff1 100644
--- a/uni-app/src/pages/login/login.vue
+++ b/uni-app/src/pages/login/login.vue
@@ -1,5 +1,9 @@
 <template>
   <view class="login-container">
+    <view class="silent-loading" v-if="silentLoading">
+      <text class="silent-loading-text">正在自动登录...</text>
+    </view>
+
     <view class="welcome-section">
       <text class="logo">TradeMate</text>
       <text class="subtitle">外贸小助手</text>
@@ -110,7 +114,7 @@
 </template>
 
 <script setup>
-import { ref } from 'vue'
+import { ref, onMounted } from 'vue'
 import { authApi } from '@/utils/api.js'
 
 const phone = ref('')
@@ -118,13 +122,73 @@ const password = ref('')
 const username = ref('')
 const isRegister = ref(false)
 const loading = ref(false)
+const silentLoading = ref(true)
 const error = ref('')
 const showForm = ref(false)
 const isWechatAvailable = ref(false)
 
-// #ifdef MP-WEIXIN
-isWechatAvailable.value = true
-// #endif
+const doWechatLogin = async (code) => {
+  const res = await authApi.wechatLogin(code)
+  uni.setStorageSync('token', res.access_token)
+  uni.setStorageSync('userInfo', res.user)
+  uni.setStorageSync('hasLogin', true)
+  uni.setStorageSync('isGuest', false)
+  uni.switchTab({ url: '/pages/index/index' })
+}
+
+onMounted(async () => {
+  // #ifdef MP-WEIXIN
+  // 微信小程序：静默登录
+  isWechatAvailable.value = true
+  try {
+    const loginRes = await new Promise((resolve, reject) => {
+      uni.login({ provider: 'weixin', success: resolve, fail: reject })
+    })
+    await doWechatLogin(loginRes.code)
+  } catch (_) {
+    silentLoading.value = false
+  }
+  // #endif
+
+  // #ifdef H5
+  // H5 微信内置浏览器：OAuth 静默登录
+  const isWechatBrowser = /MicroMessenger/i.test(navigator.userAgent)
+  if (isWechatBrowser) {
+    try {
+      const cfg = await authApi.wechatConfig()
+      if (cfg.available && cfg.app_id) {
+        const params = new URLSearchParams(window.location.search)
+        const code = params.get('code')
+        if (code) {
+          // OAuth 回调，携带 code
+          await doWechatLogin(code)
+          // 清除 URL 中的 code 参数
+          window.history.replaceState({}, '', window.location.pathname)
+          return
+        } else {
+          // 跳转微信 OAuth 授权
+          const redirectUri = encodeURIComponent(window.location.href.split('?')[0])
+          window.location.href =
+            `https://open.weixin.qq.com/connect/oauth2/authorize` +
+            `?appid=${cfg.app_id}` +
+            `&redirect_uri=${redirectUri}` +
+            `&response_type=code` +
+            `&scope=snsapi_base` +
+            `&state=STATE#wechat_redirect`
+          return
+        }
+      }
+    } catch (_) {}
+  }
+  silentLoading.value = false
+  // #endif
+
+  // #ifndef MP-WEIXIN
+  if (!/MicroMessenger/i.test(navigator.userAgent)) {
+    silentLoading.value = false
+  }
+  // #endif
+})
 
 const toggleMode = () => {
   isRegister.value = !isRegister.value
@@ -178,15 +242,7 @@ const handleWechatLogin = () => {
     success: async (loginRes) => {
        try {
          loading.value = true
-         const res = await authApi.wechatLogin(loginRes.code)
-         uni.setStorageSync('token', res.access_token)
-         uni.setStorageSync('userInfo', res.user)
-         uni.setStorageSync('hasLogin', true)
-         uni.setStorageSync('isGuest', false)
-         uni.showToast({ title: '登录成功', icon: 'success' })
-         setTimeout(() => {
-           uni.switchTab({ url: '/pages/index/index' })
-         }, 1000)
+         await doWechatLogin(loginRes.code)
        } catch (err) {
         error.value = err.message || '微信登录失败'
       } finally {
@@ -438,6 +494,24 @@ const goToQuickTry = async () => {
   margin-right: 12rpx;
 }
 
+.silent-loading {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: #fff;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 999;
+}
+
+.silent-loading-text {
+  font-size: 28rpx;
+  color: #999;
+}
+
 .footer {
   text-align: center;
   margin-top: 40rpx;
diff --git a/uni-app/src/pages/marketing/marketing.vue b/uni-app/src/pages/marketing/marketing.vue
index eb04400..fcea8a8 100644
--- a/uni-app/src/pages/marketing/marketing.vue
+++ b/uni-app/src/pages/marketing/marketing.vue
@@ -4,28 +4,28 @@
       <view
         class="tab-item"
         :class="{ active: activeTab === 'copy' }"
-        @click="activeTab = 'copy'; activeTab === 'copy' && loadStats()"
+        @click="switchTab('copy')"
       >
         开发信
       </view>
       <view
         class="tab-item"
         :class="{ active: activeTab === 'whatsapp' }"
-        @click="activeTab = 'whatsapp'; activeTab === 'whatsapp' && loadStats()"
+        @click="switchTab('whatsapp')"
       >
         WhatsApp话术
       </view>
       <view
         class="tab-item"
         :class="{ active: activeTab === 'product' }"
-        @click="activeTab = 'product'; activeTab === 'product' && loadStats()"
+        @click="switchTab('product')"
       >
         产品描述
       </view>
       <view
         class="tab-item"
         :class="{ active: activeTab === 'keywords' }"
-        @click="activeTab = 'keywords'"
+        @click="switchTab('keywords')"
       >
         关键词
       </view>
@@ -49,19 +49,19 @@
     <view class="form-section">
       <view class="form-item">
         <text class="form-label">产品名称</text>
-        <input class="form-input" v-model="formData.product_name" placeholder="如: 户外折叠椅" />
+        <input class="form-input" v-model="formData.product_name" :placeholder="tabConfig[activeTab].namePlaceholder" />
       </view>
       <view class="form-item">
-        <text class="form-label">产品描述</text>
-        <textarea class="form-textarea" v-model="formData.description" placeholder="描述产品的特点、规格、优势..." />
+        <text class="form-label">{{ tabConfig[activeTab].descLabel }}</text>
+        <textarea class="form-textarea" v-model="formData.description" :placeholder="tabConfig[activeTab].descPlaceholder" />
       </view>
-      <view class="form-item">
+      <view class="form-item" v-if="tabConfig[activeTab].showTarget">
         <text class="form-label">目标市场</text>
         <picker :range="targetMarkets" @change="onTargetChange">
           <view class="picker-value">{{ formData.target || '选择目标市场' }}</view>
         </picker>
       </view>
-      <view class="form-item">
+      <view class="form-item" v-if="tabConfig[activeTab].showStyle">
         <text class="form-label">文案风格</text>
         <view class="style-options">
           <view
@@ -88,34 +88,30 @@
         </view>
       </view>
       <button class="generate-btn" @click="generateContent" :disabled="loading">
-        {{ loading ? '生成中...' : '生成文案' }}
+        {{ loading ? '生成中...' : tabConfig[activeTab].btnText }}
       </button>
     </view>
 
-    <view class="results-section" v-if="results.length > 0 && activeTab !== 'keywords'">
+    <view class="results-section" v-if="resultsMap[activeTab] && resultsMap[activeTab].length > 0">
       <view class="results-header">
-        <text class="results-title">生成的文案</text>
-        <text class="refresh-btn" @click="generateContent">换一批</text>
-        <text class="export-btn" @click="exportCsv">导出CSV</text>
+        <text class="results-title">{{ tabConfig[activeTab].resultTitle }}</text>
+        <view class="results-actions">
+          <text class="refresh-btn" @click="generateContent">换一批</text>
+          <text class="export-btn" @click="exportCsv" v-if="activeTab !== 'keywords'">导出CSV</text>
+        </view>
       </view>
-      <view class="results-list">
-        <view class="result-item" v-for="(item, index) in results" :key="index">
+      <view class="results-list" v-if="activeTab !== 'keywords'">
+        <view class="result-item" v-for="(item, index) in resultsMap[activeTab]" :key="index">
           <text class="result-text">{{ item }}</text>
           <view class="result-actions">
             <text class="copy-btn" @click="copyText(item)">复制</text>
-            <text class="send-btn" @click="sendToWhatsapp(item)">发送</text>
-            <text class="competitor-btn" @click="runCompetitorAnalysis">竞品分析</text>
+            <text class="send-btn" @click="sendToWhatsapp(item)" v-if="activeTab !== 'product'">发送</text>
+            <text class="competitor-btn" @click="runCompetitorAnalysis" v-if="activeTab === 'copy'">竞品分析</text>
           </view>
         </view>
       </view>
-    </view>
-
-    <view class="history-section" v-if="activeTab === 'keywords' && keywords.length > 0">
-      <view class="history-header">
-        <text class="history-title">关键词建议</text>
-      </view>
-      <view class="keywords-list">
-        <view class="keyword-tag" v-for="(kw, idx) in keywords" :key="idx" @click="copyText(kw)">
+      <view class="keywords-list" v-if="activeTab === 'keywords' && resultsMap.keywords && resultsMap.keywords.length > 0">
+        <view class="keyword-tag" v-for="(kw, idx) in resultsMap.keywords" :key="idx" @click="copyText(kw)">
           {{ kw }}
         </view>
       </view>
@@ -131,20 +127,70 @@
       </view>
     </view>
 
-    <view class="empty" v-if="!loading && results.length === 0 && activeTab !== 'keywords'">
-      <text>输入产品信息，点击生成文案</text>
+    <view class="empty" v-if="!loading && (!resultsMap[activeTab] || resultsMap[activeTab].length === 0)">
+      <text>{{ tabConfig[activeTab].emptyHint }}</text>
     </view>
   </view>
 </template>
 
 <script setup>
-import { ref } from 'vue'
+import { ref, reactive } from 'vue'
 import { marketingApi, interactionApi } from '@/utils/api.js'
 
+const tabConfig = {
+  copy: {
+    label: '开发信',
+    category: 'sales_letter',
+    namePlaceholder: '如: 户外折叠椅',
+    descLabel: '产品描述',
+    descPlaceholder: '描述产品的特点、规格、优势...',
+    btnText: '生成开发信',
+    resultTitle: '生成的开发信',
+    emptyHint: '输入产品信息，点击生成开发信',
+    showTarget: true,
+    showStyle: true,
+  },
+  whatsapp: {
+    label: 'WhatsApp话术',
+    category: 'whatsapp',
+    namePlaceholder: '如: 户外折叠椅',
+    descLabel: '产品及沟通场景',
+    descPlaceholder: '描述产品特点，以及和客户沟通的具体场景...',
+    btnText: '生成话术',
+    resultTitle: '生成的WhatsApp话术',
+    emptyHint: '输入产品信息，点击生成话术',
+    showTarget: true,
+    showStyle: true,
+  },
+  product: {
+    label: '产品描述',
+    category: 'product_description',
+    namePlaceholder: '如: 户外折叠椅',
+    descLabel: '产品详细规格',
+    descPlaceholder: '描述产品的材质、尺寸、承重、颜色、包装等规格...',
+    btnText: '生成描述',
+    resultTitle: '生成的产品描述',
+    emptyHint: '输入产品信息，点击生成描述',
+    showTarget: false,
+    showStyle: false,
+  },
+  keywords: {
+    label: '关键词',
+    category: '',
+    namePlaceholder: '如: 户外折叠椅',
+    descLabel: '产品卖点',
+    descPlaceholder: '描述产品的核心卖点和目标客户群体...',
+    btnText: '生成关键词',
+    resultTitle: '关键词建议',
+    emptyHint: '输入产品信息，点击生成关键词',
+    showTarget: false,
+    showStyle: false,
+  },
+}
+
 const activeTab = ref('copy')
 const loading = ref(false)
-const results = ref([])
-const keywords = ref([])
+const resultsMap = reactive({ copy: [], whatsapp: [], product: [], keywords: [] })
 const competitorResult = ref(null)
 const stats = ref(null)
 
@@ -167,6 +213,11 @@ const onTargetChange = (e) => {
   formData.value.target = targetMarkets.value[e.detail.value]
 }
 
+const switchTab = (tab) => {
+  activeTab.value = tab
+  loadStats()
+}
+
 const loadStats = async () => {
   try {
     const res = await interactionApi.getMarketingEffectStats()
@@ -183,24 +234,26 @@ const generateContent = async () => {
   }
 
   loading.value = true
+  const tab = activeTab.value
 
   try {
-    if (activeTab.value === 'keywords') {
+    if (tab === 'keywords') {
       const res = await marketingApi.getKeywords(
         formData.value.product_name,
         formData.value.description,
         ''
       )
-      keywords.value = res.keywords || []
+      resultsMap[tab] = res.keywords || []
     } else {
+      const cfg = tabConfig[tab]
       const res = await marketingApi.generate(
         formData.value.product_name,
         formData.value.description,
-        '',
+        cfg.category,
         formData.value.target,
         formData.value.style
       )
-      results.value = res.results || []
+      resultsMap[tab] = res.results || []
       loadStats()
     }
   } catch (err) {
@@ -222,9 +275,10 @@ const copyText = (text) => {
 }
 
 const exportCsv = () => {
-  if (results.value.length === 0) return
+  const items = resultsMap[activeTab.value]
+  if (!items || items.length === 0) return
   let csv = 'Content\n'
-  results.value.forEach(r => { csv += `"${r.replace(/"/g, '""')}"\n` })
+  items.forEach(r => { csv += `"${r.replace(/"/g, '""')}"\n` })
   const blob = new Blob([csv], { type: 'text/csv' })
   const url = URL.createObjectURL(blob)
   uni.downloadFile({
@@ -414,6 +468,11 @@ const runCompetitorAnalysis = async () => {
   font-weight: 600;
 }
 
+.results-actions {
+  display: flex;
+  gap: 16rpx;
+}
+
 .refresh-btn {
   font-size: 24rpx;
   color: #1890ff;
@@ -422,7 +481,6 @@ const runCompetitorAnalysis = async () => {
 .export-btn {
   font-size: 24rpx;
   color: #52c41a;
-  margin-left: 16rpx;
 }
 
 .results-list {
@@ -470,19 +528,6 @@ const runCompetitorAnalysis = async () => {
   color: #722ed1;
 }
 
-.history-section {
-  background: #fff;
-  border-radius: 16rpx;
-  padding: 24rpx;
-}
-
-.history-title {
-  font-size: 28rpx;
-  font-weight: 600;
-  margin-bottom: 20rpx;
-  display: block;
-}
-
 .keywords-list {
   display: flex;
   flex-wrap: wrap;
diff --git a/uni-app/src/pages/quotation/quotation.vue b/uni-app/src/pages/quotation/quotation.vue
index ddfcbb8..7c47a91 100644
--- a/uni-app/src/pages/quotation/quotation.vue
+++ b/uni-app/src/pages/quotation/quotation.vue
@@ -503,7 +503,7 @@ const exportPdf = (item) => {
 .export-csv-btn {
   position: fixed;
   right: 40rpx;
-  bottom: 160rpx;
+  bottom: calc(100px + 100rpx + 24rpx);
   width: 100rpx;
   height: 100rpx;
   background: #722ed1;
@@ -523,7 +523,7 @@ const exportPdf = (item) => {
 .add-btn {
   position: fixed;
   right: 40rpx;
-  bottom: 40rpx;
+  bottom: 100px;
   width: 100rpx;
   height: 100rpx;
   background: #1890ff;
diff --git a/uni-app/src/pages/translate/translate.vue b/uni-app/src/pages/translate/translate.vue
index 8587679..7f241dc 100644
--- a/uni-app/src/pages/translate/translate.vue
+++ b/uni-app/src/pages/translate/translate.vue
@@ -114,13 +114,14 @@ const inputText = ref('')
 const result = ref('')
 const suggestions = ref([])
 const loading = ref(false)
-const targetIndex = ref(1)
+const targetIndex = ref(0)
 const keyboardHeight = ref(0)
 const rating = ref(0)
 const extractedInfo = ref(null)
 const preferences = ref(null)
 
 const targetLangs = ref([
+  { code: 'auto', name: '自动检测' },
   { code: 'en', name: 'English' },
   { code: 'zh', name: '中文' },
   { code: 'es', name: 'Español' },
@@ -143,9 +144,14 @@ const handleTranslate = async () => {
 
   try {
     if (mode.value === 'translate') {
+      let targetLang = targetLangs[targetIndex.value].code
+      if (targetLang === 'auto') {
+        const hasChinese = /[\u4e00-\u9fa5]/.test(inputText.value)
+        targetLang = hasChinese ? 'en' : 'zh'
+      }
       const res = await translateApi.translate(
         inputText.value,
-        targetLangs[targetIndex.value].code
+        targetLang
       )
       result.value = res.translated
       loadPreferences()
diff --git a/uni-app/src/utils/api.js b/uni-app/src/utils/api.js
index edaf92e..e41f09f 100644
--- a/uni-app/src/utils/api.js
+++ b/uni-app/src/utils/api.js
@@ -61,6 +61,7 @@ export const authApi = {
   register: (phone, password, username) => request('/auth/register', 'POST', { phone, password, username }),
   getUserInfo: () => request('/auth/me'),
   wechatLogin: (code) => request('/auth/wechat-login', 'POST', { code }),
+  wechatConfig: () => request('/auth/wechat/config'),
   guestLogin: () => requestWithoutAuth('/auth/login/guest', 'POST'),
 }