Fix template loading - update Dockerfile and app.py

Dockerfile

@@ -8,6 +8,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy application code
 COPY environment/ ./environment/
+COPY templates/ ./templates/
 COPY app.py .
 COPY openenv.yaml .
 COPY inference.py .

app.py

@@ -1,13 +1,14 @@
 """Flask REST API server for Email Triage OpenEnv."""
 
 import os
+from pathlib import Path
 
-from flask import Flask, request, jsonify, render_template
+from flask import Flask, request, jsonify, render_template, send_file
 
 from environment.env import EmailTriageEnv
 from environment.types import Action
 
-app = Flask(__name__)
+app = Flask(__name__, template_folder=os.path.join(os.path.dirname(__file__), 'templates'))
 
 # Global environment instances (one per task)
 environments = {}
@@ -21,7 +22,28 @@ def get_env(task_name: str = "spam_detection") -> EmailTriageEnv:
 @app.route("/", methods=["GET"])
 def index():
     """Root endpoint - Interactive dashboard"""
-    return render_template("index.html")
+    try:
+        return render_template("index.html")
+    except Exception:
+        # Fallback: read HTML file directly
+        html_path = os.path.join(os.path.dirname(__file__), 'templates', 'index.html')
+        if os.path.exists(html_path):
+            with open(html_path, 'r', encoding='utf-8') as f:
+                return f.read()
+        return jsonify({
+            "status": "ok",
+            "message": "Email Triage OpenEnv API",
+            "version": "1.0.0",
+            "note": "Dashboard not available. Use API endpoints directly.",
+            "endpoints": {
+                "health": "GET /health",
+                "tasks": "GET /tasks",
+                "reset": "POST /reset?task=spam_detection",
+                "step": "POST /step?task=spam_detection",
+                "state": "GET /state?task=spam_detection",
+                "state-describe": "GET /state-describe?task=spam_detection"
+            }
+        }), 200
 
 @app.route("/health", methods=["GET"])
 def health():