added delete option

Docs/API.md

@@ -368,6 +368,71 @@ Return detailed information about a specific series.
 
 Source: [src/server/api/anime.py](../src/server/api/anime.py#L713-L793)
 
+### DELETE /api/anime/{anime_key}
+
+Delete an anime series from the database, filesystem, or both. Requires
+authentication and explicit typed confirmation.
+
+**Authentication:** Required
+
+**Path Parameters:**
+| Parameter | Description |
+|-----------|-------------|
+| `anime_key` | Series key (primary identifier) |
+
+**Request Body:**
+```json
+{
+    "delete_database": true,
+    "delete_folder": false,
+    "confirm_text": "delete"
+}
+```
+
+| Field | Type | Default | Description |
+|-------|------|---------|-------------|
+| `delete_database` | bool | `true` | Remove series and episodes from SQLite |
+| `delete_folder` | bool | `false` | Delete the series folder and all files |
+| `confirm_text` | string | — | Must be exactly `"delete"` (case-sensitive) |
+
+**Response (200 OK):**
+```json
+{
+    "success": true,
+    "key": "attack-on-titan",
+    "name": "Attack on Titan",
+    "deleted_from_database": true,
+    "deleted_folder": false,
+    "folder_path": null,
+    "database_error": null,
+    "folder_error": null,
+    "message": "Removed from database."
+}
+```
+
+**Error Responses:**
+
+| Status | Condition |
+|--------|-----------|
+| 400 | `confirm_text != "delete"` or neither flag is `true` |
+| 401 | Not authenticated |
+| 404 | Series `key` not found in database |
+| 500 | Unexpected server error |
+
+**Deletion Modes:**
+
+| Flags | Effect |
+|-------|--------|
+| `delete_database=true, delete_folder=false` | Removes series from SQLite. Folder on disk is preserved. |
+| `delete_database=false, delete_folder=true` | Deletes folder and all files. Database record preserved. |
+| `delete_database=true, delete_folder=true` | Full removal: database record deleted AND folder/files deleted. |
+
+**Path Safety:** Folder deletion is blocked if the path is outside the configured anime base directory (path traversal protection via `is_safe_path`).
+
+**WebSocket Broadcast:** On success, a `series_deleted` event is broadcast to all connected clients, causing the anime card to be removed from all browser sessions in real-time.
+
+Source: [src/server/api/anime.py](../src/server/api/anime.py#L1759-L1840)
+
 ---
 
 ## 4. Download Queue Endpoints