Fix permission: mkdir after COPY, chmod /app

Dockerfile

@@ -10,7 +10,6 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Writable dirs for matplotlib and HF cache
 ENV MPLCONFIGDIR=/tmp/matplotlib
 ENV HF_HOME=/tmp/hf_cache
-RUN mkdir -p /tmp/matplotlib /tmp/hf_cache
 
 # Python deps
 COPY requirements.txt .
@@ -19,9 +18,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 # App code
 COPY . .
 
-# Writable dirs for outputs
-RUN mkdir -p /app/models /app/outputs /app/logs /app/eval_logs && \
-    chmod -R 777 /app/models /app/outputs /app/logs /app/eval_logs /tmp/matplotlib /tmp/hf_cache
+# Create writable dirs AFTER copy
+RUN mkdir -p /app/models /app/outputs /app/logs /app/eval_logs /tmp/matplotlib /tmp/hf_cache && \
+    chmod -R 777 /app/models /app/outputs /app/logs /app/eval_logs /tmp/matplotlib /tmp/hf_cache /app
 
 EXPOSE 7860