feat: Enhance idea retrieval to include the latest generation and support user-specific ideas not tied to a project, while also improving asset storage uniqueness and adjusting generation cancellation timeout.

repos/idea_repo.py

@@ -20,14 +20,43 @@ class IdeaRepo:
             return Idea(**res)
         return None
 
-    async def get_ideas(self, project_id: str, limit: int = 20, offset: int = 0) -> List[Idea]:
-        filter = {"project_id": project_id, "is_deleted": False}
-        res = await self.collection.find(filter).sort("updated_at", -1).skip(offset).limit(limit).to_list(None)
-        ideas = []
-        for doc in res:
-            doc["id"] = str(doc.pop("_id"))
-            ideas.append(Idea(**doc))
-        return ideas
+    async def get_ideas(self, project_id: Optional[str], user_id: str, limit: int = 20, offset: int = 0) -> List[dict]:
+        if project_id:
+            match_stage = {"project_id": project_id, "is_deleted": False}
+        else:
+            match_stage = {"created_by": user_id, "project_id": None, "is_deleted": False}
+            
+        pipeline = [
+            {"$match": match_stage},
+            {"$sort": {"updated_at": -1}},
+            {"$skip": offset},
+            {"$limit": limit},
+            # Add string id field for lookup
+            {"$addFields": {"str_id": {"$toString": "$_id"}}},
+            # Lookup generations
+            {
+                "$lookup": {
+                    "from": "generations",
+                    "let": {"idea_id": "$str_id"},
+                    "pipeline": [
+                        {"$match": {"$expr": {"$eq": ["$idea_id", "$$idea_id"]}}},
+                        {"$sort": {"created_at": -1}},  # Ensure we get the latest
+                        {"$limit": 1}
+                    ],
+                    "as": "generations"
+                }
+            },
+            # Unwind generations array (preserve ideas without generations)
+            {"$unwind": {"path": "$generations", "preserveNullAndEmptyArrays": True}},
+            # Rename for clarity
+            {"$addFields": {
+                "last_generation": "$generations",
+                "id": "$str_id"
+            }},
+            {"$project": {"generations": 0, "str_id": 0, "_id": 0}}
+        ]
+        
+        return await self.collection.aggregate(pipeline).to_list(None)
 
     async def delete_idea(self, idea_id: str) -> bool:
         if not ObjectId.is_valid(idea_id):