Fix LLM model list, Castopod API, and server runner

- Remove gpt-4o-realtime (WebSocket-only) from OpenRouter models
- Increase OpenRouter timeout to 60s and max_tokens to 150
- Handle empty LLM responses
- Fix publish_episode.py for current Castopod API fields
- Add port conflict check and graceful shutdown to run.sh

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

run.sh

@@ -1,6 +1,7 @@
 #!/bin/bash
 # AI Radio Show - Server Runner with restart support
 
+PORT=8000
 LOG_FILE="/tmp/ai-radio-show.log"
 RESTART_FLAG="/tmp/ai-radio-show.restart"
 STOP_FLAG="/tmp/ai-radio-show.stop"
@@ -13,16 +14,46 @@ source venv/bin/activate
 # Cleanup old flags
 rm -f "$RESTART_FLAG" "$STOP_FLAG"
 
+# Check if port is already in use
+if lsof -i ":$PORT" -sTCP:LISTEN -t >/dev/null 2>&1; then
+    EXISTING_PID=$(lsof -i ":$PORT" -sTCP:LISTEN -t 2>/dev/null | head -1)
+    echo "ERROR: Port $PORT is already in use by PID $EXISTING_PID"
+    echo "Run: kill $EXISTING_PID"
+    exit 1
+fi
+
+kill_server() {
+    local pid=$1
+    if ! kill -0 "$pid" 2>/dev/null; then
+        return
+    fi
+    kill "$pid" 2>/dev/null
+    # Wait up to 5 seconds for graceful shutdown
+    for i in $(seq 1 10); do
+        if ! kill -0 "$pid" 2>/dev/null; then
+            return
+        fi
+        sleep 0.5
+    done
+    # Force kill if still alive
+    echo "[$(date)] Server didn't stop gracefully, force killing..." | tee -a "$LOG_FILE"
+    kill -9 "$pid" 2>/dev/null
+    wait "$pid" 2>/dev/null
+}
+
 echo "AI Radio Show Server Runner"
 echo "Log file: $LOG_FILE"
 echo "Press Ctrl+C to stop"
 echo ""
 
-while true; do
-    echo "[$(date)] Starting server..." | tee -a "$LOG_FILE"
+# Handle Ctrl+C
+trap 'echo ""; echo "[$(date)] Interrupted" | tee -a "$LOG_FILE"; kill_server $SERVER_PID; exit 0' INT TERM
 
-    # Start uvicorn with output to both console and log file
-    python -m uvicorn backend.main:app --host 0.0.0.0 --port 8000 2>&1 | tee -a "$LOG_FILE" &
+while true; do
+    echo "[$(date)] Starting server on port $PORT..." | tee -a "$LOG_FILE"
+
+    # Start uvicorn directly (not through tee pipe so we get the real PID)
+    python -m uvicorn backend.main:app --host 0.0.0.0 --port $PORT >> "$LOG_FILE" 2>&1 &
     SERVER_PID=$!
 
     # Wait for server to exit or restart signal
@@ -30,8 +61,7 @@ while true; do
         if [ -f "$RESTART_FLAG" ]; then
             echo "[$(date)] Restart requested..." | tee -a "$LOG_FILE"
             rm -f "$RESTART_FLAG"
-            kill $SERVER_PID 2>/dev/null
-            wait $SERVER_PID 2>/dev/null
+            kill_server $SERVER_PID
             sleep 1
             break
         fi
@@ -39,8 +69,7 @@ while true; do
         if [ -f "$STOP_FLAG" ]; then
             echo "[$(date)] Stop requested..." | tee -a "$LOG_FILE"
             rm -f "$STOP_FLAG"
-            kill $SERVER_PID 2>/dev/null
-            wait $SERVER_PID 2>/dev/null
+            kill_server $SERVER_PID
             echo "[$(date)] Server stopped." | tee -a "$LOG_FILE"
             exit 0
         fi