fix: chown /usr/share/ollama after install so ollama user can write to it

- The Ollama installer run via sudo leaves /usr/share/ollama owned by root
- The ollama service runs as the ollama user and needs write access
- Added chown after installation to fix permissions

install.sh

@@ -195,6 +195,11 @@ case "$AI_CHOICE" in
         info "Installing Ollama..."
         if ! command -v ollama &>/dev/null; then
             sudo_if sh -c "$(curl -fsSL https://ollama.com/install.sh)" 2>&1 | tail -5
+            # Fix permissions: the installer may leave /usr/share/ollama owned by root
+            # when run via sudo, but the ollama service runs as the ollama user
+            if id -u ollama &>/dev/null; then
+                sudo_if chown -R ollama:ollama /usr/share/ollama 2>/dev/null || true
+            fi
         else
             info "Ollama already installed"
         fi