Add complete Qt/PySide6 dependencies to Dockerfiles

Add fontconfig, freetype, and xcb libraries needed for Qt GUI.

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Dockerfile

@@ -18,7 +18,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     firefox-esr \
     # xdg-open for opening URLs (used by Claude CLI)
     xdg-utils \
-    # X11 and OpenGL for Qt/PySide6
+    # X11, OpenGL, and Qt/PySide6 dependencies
     libx11-6 \
     libxext6 \
     libxrender1 \
@@ -26,6 +26,22 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libegl1 \
     libxkbcommon0 \
     libdbus-1-3 \
+    libfontconfig1 \
+    libfreetype6 \
+    libxcb1 \
+    libxcb-cursor0 \
+    libxcb-icccm4 \
+    libxcb-image0 \
+    libxcb-keysyms1 \
+    libxcb-randr0 \
+    libxcb-render0 \
+    libxcb-render-util0 \
+    libxcb-shape0 \
+    libxcb-shm0 \
+    libxcb-sync1 \
+    libxcb-xfixes0 \
+    libxcb-xinerama0 \
+    libxcb-xkb1 \
     && rm -rf /var/lib/apt/lists/*
 
 # Set working directory