feat: add proper HTTP status codes to all API error responses

- 217 error returns across 18 route files + api.py now use JSONResponse
  with appropriate HTTP status codes instead of returning HTTP 200
- Status code distribution: 500 (121), 400 (39), 503 (28), 404 (24), 409 (3), 502 (2)
- Fixed language.py tuple-return bug (was serializing as JSON array)
- Fixed bare except clauses in bipolar_mode.py and voice.py
- Body-level error schemas preserved (status/error + success/error patterns)
  so web UI continues working without changes
- chat.py (SSE) unchanged: errors sent within stream protocol
- All 170 tests pass

bot/routes/memory.py

@@ -2,6 +2,7 @@
 
 from typing import Optional
 from fastapi import APIRouter, Form
+from fastapi.responses import JSONResponse
 import globals
 from routes.models import MemoryDeleteRequest, MemoryEditRequest, MemoryCreateRequest
 from utils.logger import get_logger
@@ -51,7 +52,7 @@ async def get_memory_stats():
     from utils.cat_client import cat_adapter
     stats = await cat_adapter.get_memory_stats()
     if stats is None:
-        return {"success": False, "error": "Could not reach Cheshire Cat"}
+        return JSONResponse(status_code=502, content={"success": False, "error": "Could not reach Cheshire Cat"})
     return {"success": True, "collections": stats.get("collections", [])}
 
 
@@ -69,7 +70,7 @@ async def get_episodic_memories():
     from utils.cat_client import cat_adapter
     result = await cat_adapter.get_memory_points(collection="episodic", limit=100)
     if result is None:
-        return {"success": False, "error": "Could not reach Cheshire Cat"}
+        return JSONResponse(status_code=502, content={"success": False, "error": "Could not reach Cheshire Cat"})
 
     memories = []
     for point in result.get("points", []):
@@ -90,7 +91,7 @@ async def trigger_memory_consolidation():
     logger.info("🌙 Manual memory consolidation triggered via API")
     result = await cat_adapter.trigger_consolidation()
     if result is None:
-        return {"success": False, "error": "Consolidation failed or timed out"}
+        return JSONResponse(status_code=500, content={"success": False, "error": "Consolidation failed or timed out"})
     return {"success": True, "result": result}
 
 
@@ -108,11 +109,11 @@ async def delete_all_memories(request: MemoryDeleteRequest):
 
     if request.confirmation != REQUIRED_CONFIRMATION:
         logger.warning(f"Memory deletion rejected: wrong confirmation string")
-        return {
+        return JSONResponse(status_code=400, content={
             "success": False,
             "error": "Confirmation string does not match. "
                      f"Expected exactly: \"{REQUIRED_CONFIRMATION}\""
-        }
+        })
 
     from utils.cat_client import cat_adapter
     logger.warning("⚠️ MEMORY DELETION CONFIRMED — wiping all memories!")
@@ -132,10 +133,10 @@ async def delete_all_memories(request: MemoryDeleteRequest):
             "conversation_history_cleared": history_success
         }
     else:
-        return {
+        return JSONResponse(status_code=500, content={
             "success": False,
             "error": "Failed to wipe memory collections. Check Cat connection."
-        }
+        })
 
 
 @router.delete("/memory/point/{collection}/{point_id}")
@@ -146,7 +147,7 @@ async def delete_single_memory_point(collection: str, point_id: str):
     if success:
         return {"success": True, "deleted": point_id}
     else:
-        return {"success": False, "error": f"Failed to delete point {point_id}"}
+        return JSONResponse(status_code=500, content={"success": False, "error": f"Failed to delete point {point_id}"})
 
 
 @router.put("/memory/point/{collection}/{point_id}")
@@ -162,7 +163,7 @@ async def edit_memory_point(collection: str, point_id: str, request: MemoryEditR
     if success:
         return {"success": True, "updated": point_id}
     else:
-        return {"success": False, "error": f"Failed to update point {point_id}"}
+        return JSONResponse(status_code=500, content={"success": False, "error": f"Failed to update point {point_id}"})
 
 
 @router.post("/memory/create")
@@ -176,7 +177,7 @@ async def create_memory_point(request: MemoryCreateRequest):
     from utils.cat_client import cat_adapter
 
     if request.collection not in ['declarative', 'episodic']:
-        return {"success": False, "error": "Collection must be 'declarative' or 'episodic'"}
+        return JSONResponse(status_code=400, content={"success": False, "error": "Collection must be 'declarative' or 'episodic'"})
 
     # Create the memory point
     result = await cat_adapter.create_memory_point(
@@ -190,4 +191,4 @@ async def create_memory_point(request: MemoryCreateRequest):
     if result:
         return {"success": True, "point_id": result, "collection": request.collection}
     else:
-        return {"success": False, "error": "Failed to create memory point"}
+        return JSONResponse(status_code=500, content={"success": False, "error": "Failed to create memory point"})