fix: update api_base for dev/prod and make model checkpoints path dynamic

toothmap_backend/main.py

@@ -20,7 +20,11 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-CKPT_DIR = "/app/checkpoints"
+# Dynamic checkpoint directory
+if os.path.exists("/app/checkpoints"):
+    CKPT_DIR = "/app/checkpoints"
+else:
+    CKPT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "checkpoints"))
 yolo_model = None
 
 @app.on_event("startup")

toothmap_frontend/src/App.jsx

@@ -2,7 +2,7 @@ import React, { useState, useRef, useEffect } from 'react';
 import axios from 'axios';
 import { UploadCloud, Activity, Loader2, ScanLine, Search } from 'lucide-react';
 
-const API_BASE = "";
+const API_BASE = import.meta.env.DEV ? "http://localhost:8000" : "";
 
 const QUADRANT_COLOURS = ['#3b82f6', '#22c55e', '#f59e0b', '#ef4444'];
 const UPPER_TEETH = [18, 17, 16, 15, 14, 13, 12, 11, 21, 22, 23, 24, 25, 26, 27, 28];