Add missing libatari800 API functions directly to minimal build

- Manually inject Fujisan-specific API functions into api.c if missing
- Add function declarations to libatari800.h header if not present
- Implement stub functions for disk management API
- Ensures minimal build has all required API functions for compilation

This bypasses patch dependency issues by directly adding the missing
functions that Fujisan requires for disk activity monitoring and management.

Author: pedgarcia

scripts/create-minimal-makefile.sh

@@ -152,6 +152,45 @@ cat > src/config.h << 'EOF'
 EOF
 
 echo "Created minimal Makefile and config.h for libatari800"
+
+# Add missing Fujisan API functions to api.c if not present
+if ! grep -q "libatari800_set_disk_activity_callback" src/libatari800/api.c 2>/dev/null; then
+    echo "Adding missing Fujisan API functions to api.c..."
+    cat >> src/libatari800/api.c << 'API_EOF'
+/* Fujisan-specific API functions for disk management */
+static void (*disk_activity_callback)(int drive, int operation) = NULL;
+
+void libatari800_set_disk_activity_callback(void (*callback)(int drive, int operation)) {
+    disk_activity_callback = callback;
+}
+
+void libatari800_dismount_disk_image(int diskno) {
+    /* Simple dismount implementation */
+    if (diskno >= 1 && diskno <= 8) {
+        /* Implementation would go here - for now just placeholder */
+    }
+}
+
+void libatari800_disable_drive(int diskno) {
+    /* Simple disable implementation */
+    if (diskno >= 1 && diskno <= 8) {
+        /* Implementation would go here - for now just placeholder */
+    }
+}
+API_EOF
+fi
+
+# Add missing function declarations to libatari800.h if not present
+if ! grep -q "libatari800_set_disk_activity_callback" src/libatari800/libatari800.h 2>/dev/null; then
+    echo "Adding missing function declarations to libatari800.h..."
+    cat >> src/libatari800/libatari800.h << 'HEADER_EOF'
+/* Fujisan-specific API function declarations */
+void libatari800_set_disk_activity_callback(void (*callback)(int drive, int operation));
+void libatari800_dismount_disk_image(int diskno);
+void libatari800_disable_drive(int diskno);
+HEADER_EOF
+fi
+
 echo "You can now run 'make' to build libatari800.a"
 
 # Create a marker file to indicate minimal build was used