trying to fix bug

open

@@ -11,7 +11,25 @@ if curl -sf "$BACKEND_URL" > /dev/null 2>&1; then
     echo "Backend already running on port ${BACKEND_PORT}."
 else
     echo "Backend not running — starting it in a new terminal..."
-    VENV_PYTHON="${PROJECT_DIR}/.venv312/bin/python"
+    VENV_PYTHON=""
+    PYTHON_CANDIDATES=(
+        "${PROJECT_DIR}/.venv312/bin/python3.12"
+        "${PROJECT_DIR}/.venv312/bin/python"
+        "${PROJECT_DIR}/.venv/bin/python3"
+        "${PROJECT_DIR}/.venv/bin/python"
+        "${PROJECT_DIR}/venv/bin/python3"
+        "${PROJECT_DIR}/venv/bin/python"
+    )
+    for candidate in "${PYTHON_CANDIDATES[@]}"; do
+        if [[ -x "${candidate}" ]]; then
+            VENV_PYTHON="${candidate}"
+            break
+        fi
+    done
+    if [[ -z "${VENV_PYTHON}" ]]; then
+        echo "No project virtualenv Python found. Checked: .venv312, .venv, venv"
+        exit 1
+    fi
     BACKEND_DIR="${PROJECT_DIR}/backend"
 
     # Try common terminal emulators in order