refactor: #85 T9 extrait realtime et render vers modules dedies (comportement inchange)

backend/schemas.py

@@ -214,6 +214,30 @@ class RestoreResponse(BaseModel):
     current_backed_up: int | None = Field(default=None, description="Timestamp of the backup created from the current version before restore, if any")
 
 
+class BackupEntry(BaseModel):
+    """A single backup version of a file (#85 — extrait de backend.main, inchangé)."""
+
+    timestamp: int = Field(description="Unix timestamp of when the backup was created")
+    datetime: str = Field(description="ISO 8601 datetime string")
+    size: int = Field(description="File size in bytes")
+    filename: str = Field(description="Backup filename on disk")
+
+
+class BackupListResponse(BaseModel):
+    """Response listing all available backups for a file (#85 — extrait de backend.main, inchangé)."""
+
+    vault: str = Field(description="Vault name")
+    path: str = Field(description="Relative file path")
+    backups: list[BackupEntry] = Field(description="Available backups, newest first")
+
+
+class DiffRequest(BaseModel):
+    """Request parameters for generating a diff (#85 — extrait de backend.main, inchangé)."""
+
+    version: int = Field(description="Timestamp of the backup version to compare")
+    compare_with: int | None = Field(default=None, description="Timestamp of another backup version. If omitted, compares with the current file.")
+
+
 # ---------------------------------------------------------------------------
 # Files — browse / read (#85 — extrait de backend.main, inchangé)
 # ---------------------------------------------------------------------------