feat: 修复 H5 底部导航覆盖 + 更新项目进度文档

## H5 底部导航修复 (Bug #10)
- 精简 App.vue，移除重复 tabbar，仅保留全局样式
- uni-page 设置 height: calc(100% - 50px) + overflow-y: auto
- 内容区域精确停在底部导航上方，独立滚动不再叠加
- 恢复 custom-tab-bar 组件

## 项目进度文档
- PROGRESS.md 更新至 10 个 Bug 修复
- 新增 H5 底部导航修复记录
- 新增历史变更条目

backend/app/config.py

@@ -1,4 +1,4 @@
-from pydantic_settings import BaseSettings
+from pydantic import BaseSettings
 from typing import Optional
 from pathlib import Path
 
@@ -8,7 +8,10 @@ ENV_FILE = PROJECT_ROOT / ".env"
 
 
 class Settings(BaseSettings):
-    model_config = {"env_file": str(ENV_FILE), "extra": "ignore"}
+    class Config:
+        env_file = str(ENV_FILE)
+        env_file_encoding = "utf-8"
+        extra = "ignore"
 
     APP_NAME: str = "TradeMate"
 
@@ -29,6 +32,14 @@ class Settings(BaseSettings):
     ANTHROPIC_API_KEY: Optional[str] = None
     DEEPL_API_KEY: Optional[str] = None
 
+    SENSENOVA_API_KEY: Optional[str] = None
+    SENSENOVA_BASE_URL: str = "https://token.sensenova.cn/v1"
+    SENSENOVA_MODEL: str = "sensenova-6.7-flash-lite"
+
+    IFLYTEK_API_KEY: Optional[str] = None
+    IFLYTEK_API_BASE: str = "https://maas-api.cn-huabei-1.xf-yun.com/v2"
+    IFLYTEK_MODEL: str = "astron-code-latest"
+
     LOCAL_MODEL_ENABLED: bool = False
     LOCAL_MODEL_URL: str = "http://localhost:8001"
 
@@ -38,6 +49,7 @@ class Settings(BaseSettings):
 
     WECHAT_APP_ID: Optional[str] = None
     WECHAT_APP_SECRET: Optional[str] = None
+    WECHAT_PUSH_TEMPLATE_ID: Optional[str] = None
 
     EXCHANGE_RATE_API_KEY: Optional[str] = None
 
@@ -47,12 +59,15 @@ class Settings(BaseSettings):
     FRONTEND_URL: str = "http://localhost:3000"
     BACKEND_URL: str = "http://localhost:8000"
 
+    SENTRY_DSN: Optional[str] = None
+    DEBUG: bool = True
+
     AI_ROUTING: dict = {
-        "translate": {"primary": "deepl", "fallback": ["openai", "local"]},
-        "reply": {"primary": "openai", "fallback": ["anthropic", "local"]},
-        "marketing": {"primary": "anthropic", "fallback": ["openai", "local"]},
-        "extract": {"primary": "openai", "fallback": ["anthropic"]},
-        "quotation": {"primary": "openai", "fallback": ["anthropic"]},
+        "translate": {"primary": "sensenova", "fallback": ["openai", "local"]},
+        "reply": {"primary": "sensenova", "fallback": ["anthropic", "local"]},
+        "marketing": {"primary": "sensenova", "fallback": ["openai", "local"]},
+        "extract": {"primary": "sensenova", "fallback": ["openai"]},
+        "quotation": {"primary": "sensenova", "fallback": ["openai"]},
     }
 
     FREE_DAILY_TRANSLATE_CHARS: int = 5000