fix: align Freepik API paths with OpenAPI spec

The original implementation used guessed endpoint paths that don't match
the actual Freepik API. Key fixes based on their OpenAPI spec:

- Task polling is per-endpoint (e.g. GET /v1/ai/text-to-image/flux-dev/{task-id})
  not a generic /v1/ai/tasks/{id}. freepik_client now returns TaskResult
  with status_path, and task_tracker polls using that path.
- Fixed endpoint paths: flux-pro -> flux-pro-v1-1, upscale -> image-upscaler,
  relight -> image-relight, style-transfer -> image-style-transfer,
  expand -> image-expand/flux-pro, inpaint -> ideogram-image-edit,
  remove-background -> beta/remove-background, classifier -> classifier/image,
  audio-isolate -> audio-isolation, icon -> text-to-icon
- Fixed video paths: kling -> kling-o1-pro with kling-o1 status path,
  minimax -> minimax-hailuo-02-1080p, seedance -> seedance-pro-1080p
- Fixed request schemas to match actual API params (e.g. scale_factor
  not scale, reference_image not style_reference, image_url for bg removal)
- Fixed response parsing: status is uppercase (COMPLETED not completed),
  results in data.generated[] array, classifier returns [{class_name, probability}]

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/routers/image_editing.py

@@ -14,19 +14,19 @@ from app.schemas.image_editing import (
     UpscalePrecisionRequest,
 )
 from app.services import freepik_client, task_tracker
+from app.services.freepik_client import TaskResult, _extract_task_id
 
 logger = logging.getLogger(__name__)
 
 router = APIRouter(prefix='/api/v1/edit', tags=['image-editing'])
 
 
-async def _submit_and_respond(result: dict, sync: bool, metadata: dict) -> TaskResponse | TaskDetail:
-    data = result.get('data', result)
-    freepik_task_id = str(data.get('task_id') or data.get('id', ''))
+async def _submit_and_respond(result: TaskResult, sync: bool, metadata: dict) -> TaskResponse | TaskDetail:
+    freepik_task_id = _extract_task_id(result.data)
     if not freepik_task_id:
         raise HTTPException(status_code=502, detail='No task_id in Freepik response')
 
-    internal_id = task_tracker.submit(freepik_task_id, metadata)
+    internal_id = task_tracker.submit(freepik_task_id, result.status_path, metadata)
 
     if not sync:
         return TaskResponse(
@@ -63,9 +63,10 @@ async def upscale_creative(request: UpscaleCreativeRequest, sync: bool = Query(F
     result = await freepik_client.upscale_creative(
         image=request.image,
         prompt=request.prompt,
-        scale=request.scale,
+        scale_factor=request.scale_factor,
         creativity=request.creativity,
         resemblance=request.resemblance,
+        optimized_for=request.optimized_for,
     )
     return await _submit_and_respond(result, sync, {'operation': 'upscale-creative'})
 
@@ -74,7 +75,7 @@ async def upscale_creative(request: UpscaleCreativeRequest, sync: bool = Query(F
 async def upscale_precision(request: UpscalePrecisionRequest, sync: bool = Query(False)):
     result = await freepik_client.upscale_precision(
         image=request.image,
-        scale=request.scale,
+        scale_factor=request.scale_factor,
     )
     return await _submit_and_respond(result, sync, {'operation': 'upscale-precision'})
 
@@ -84,8 +85,8 @@ async def relight(request: RelightRequest, sync: bool = Query(False)):
     result = await freepik_client.relight_image(
         image=request.image,
         prompt=request.prompt,
-        light_source=request.light_source,
-        intensity=request.intensity,
+        transfer_light_from_reference_image=request.transfer_light_from_reference_image,
+        light_transfer_strength=request.light_transfer_strength,
     )
     return await _submit_and_respond(result, sync, {'operation': 'relight'})
 
@@ -94,8 +95,10 @@ async def relight(request: RelightRequest, sync: bool = Query(False)):
 async def style_transfer(request: StyleTransferRequest, sync: bool = Query(False)):
     result = await freepik_client.style_transfer(
         image=request.image,
-        style_reference=request.style_reference,
-        strength=request.strength,
+        reference_image=request.reference_image,
+        prompt=request.prompt,
+        style_strength=request.style_strength,
+        structure_strength=request.structure_strength,
     )
     return await _submit_and_respond(result, sync, {'operation': 'style-transfer'})
 
@@ -105,7 +108,6 @@ async def expand(request: ExpandRequest, sync: bool = Query(False)):
     result = await freepik_client.expand_image(
         image=request.image,
         prompt=request.prompt,
-        direction=request.direction,
     )
     return await _submit_and_respond(result, sync, {'operation': 'expand'})