feat: 全屏个股详情预览 + Tailwind 改版 + 账号鉴权

backend/app/schemas.py

@@ -202,3 +202,21 @@ class PreviewResponse(BaseModel):
     candles: list[CandleOut]
     indicators: dict[str, dict[str, list[float | None]]] = Field(default_factory=dict)
     # indicators 形如 {"ma": {"ma5": [...], ...}, "macd": {"dif": ...}, "kdj": {...}, "rsi": {...}, "boll": {...}}
+
+
+# ---------- Auth ----------
+class LoginRequest(BaseModel):
+    username: str = Field(min_length=1, max_length=64)
+    password: str = Field(min_length=1, max_length=1024)
+
+
+class CurrentUserOut(BaseModel):
+    id: int
+    username: str
+
+    model_config = {"from_attributes": True}
+
+
+class LoginResponse(BaseModel):
+    user: CurrentUserOut
+    expires_at: datetime