hoàn thành bước3.2. PDF Gallery (Dashboard)

backend/app/schemas.py

@@ -45,3 +45,21 @@ class UserOut(BaseModel):
 class TokenPayload(BaseModel):
     sub: int   # user id
     exp: int
+
+
+# ── PDFs ──────────────────────────────────────────────────────────────────────
+
+class PDFOut(BaseModel):
+    id: int
+    title: str
+    total_pages: int | None
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class PDFUploadResult(BaseModel):
+    filename: str
+    success: bool
+    pdf: PDFOut | None = None
+    error: str | None = None