added a user system

sentence_api/models.py

@@ -131,3 +131,53 @@ class AssessmentResult(BaseModel):
     substitutions: List[TextSubstitution]
     feedback: str
     details: Dict[str, str] = Field(default_factory=dict)
+
+
+class AuthRequest(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    username: str = Field(min_length=3, max_length=50, pattern=r"^[A-Za-z0-9_.-]+$")
+    password: str = Field(min_length=8, max_length=128)
+
+
+class UserPublic(BaseModel):
+    id: str
+    username: str
+    nickname: str
+    created_at: datetime
+
+
+class AuthResponse(BaseModel):
+    token: str
+    user: UserPublic
+
+
+class CourseSummary(BaseModel):
+    video_hash: str
+    title: str
+    duration_ms: Optional[int] = None
+    language: Optional[str] = None
+    sentence_count: int = Field(ge=0)
+    stream_url: str
+    enrolled: bool
+
+
+class UserResultSummary(BaseModel):
+    attempt_id: str
+    video_hash: str
+    course_title: str
+    sentence_index: int
+    sentence_text: str
+    overall_score: float = Field(ge=0, le=100)
+    passed: bool
+    created_at: datetime
+
+
+class UserDubShareSummary(BaseModel):
+    share_id: str
+    video_hash: str
+    course_title: str
+    title: str
+    segment_count: int = Field(ge=0)
+    average_score: float = Field(ge=0, le=100)
+    created_at: datetime