Fix duplication and update front end

server.py

@@ -20,6 +20,7 @@ class Idea(BaseModel):
     end_time:   Optional[datetime] = None
     description: str
     voters: list[str] = Field(default_factory=list)
+    decided: bool = False
 
 class Tour(BaseModel):
     id: str
@@ -127,6 +128,9 @@ def add_idea(tour_id: str, idea: IdeaCreate):
         with open(filepath) as f:
             data = json.load(f)
 
+        if any(i.get("decided") for i in data["ideas"]):
+            raise HTTPException(status_code=403, detail="Idea already decided")
+
         idea_id = str(uuid.uuid4())
         new_idea = Idea(
             id=idea_id,
@@ -135,6 +139,7 @@ def add_idea(tour_id: str, idea: IdeaCreate):
             voters=[],
             start_time=idea.start_time,
             end_time=idea.end_time,
+            decided=False,
         )
 
         data["ideas"].append(new_idea.model_dump())
@@ -159,6 +164,8 @@ def vote_idea(tour_id: str, idea_id: str, vote: Vote):
         with open(filepath) as f:
             data = json.load(f)
 
+        if any(i.get("decided") for i in data["ideas"]):
+            raise HTTPException(status_code=403, detail="Idea already decided")
         for idea in data["ideas"]:
             if idea["id"] == idea_id:
                 if vote.voterName not in idea["voters"]:
@@ -170,6 +177,32 @@ def vote_idea(tour_id: str, idea_id: str, vote: Vote):
 
     raise HTTPException(status_code=404, detail="Idea not found")
 
+# ─── ENDPOINT: DECIDE IDEA ────────────────────────────────────────────────────
+
+@app.post("/tour/v1/tours/{tour_id}/ideas/{idea_id}/decide", response_model=Idea)
+def decide_idea(tour_id: str, idea_id: str):
+    """Mark an idea as decided. Only one idea can be decided per tour."""
+    filepath = get_tour_filepath(tour_id)
+    if not os.path.exists(filepath):
+        raise HTTPException(status_code=404, detail="Tour not found")
+
+    lock = FileLock(filepath + ".lock")
+    with lock:
+        with open(filepath) as f:
+            data = json.load(f)
+
+        if any(i.get("decided") for i in data["ideas"]):
+            raise HTTPException(status_code=403, detail="Idea already decided")
+
+        for idea in data["ideas"]:
+            if idea["id"] == idea_id:
+                idea["decided"] = True
+                with open(filepath, "w") as f:
+                    json.dump(data, f, default=str)
+                return Idea(**idea)
+
+    raise HTTPException(status_code=404, detail="Idea not found")
+
 # ─── MAIN: RUN UVIDORN WITH COMMAND-LINE DATA DIR ──────────────────────────────
 
 if __name__ == "__main__":