added api for ai; got backend working

backend/background_removal.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+"""
+Background removal operations (placeholder for Phase 5).
+"""
+
+import json
+import sys
+from pathlib import Path
+
+# Add backend to path
+sys.path.insert(0, str(Path(__file__).parent))
+
+from services.background_removal import is_available, remove_background_on_export
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: python background_removal.py <command> [args...]", file=sys.stderr)
+        sys.exit(1)
+
+    command = sys.argv[1]
+
+    try:
+        if command == "is_available":
+            result = is_available()
+            print(json.dumps({"available": result}))
+
+        elif command == "remove_background_on_export":
+            if len(sys.argv) != 6:
+                print("Usage: python background_removal.py remove_background_on_export <input_path> <output_path> <replacement> <replacement_value>", file=sys.stderr)
+                sys.exit(1)
+            input_path = sys.argv[2]
+            output_path = sys.argv[3]
+            replacement = sys.argv[4]
+            replacement_value = sys.argv[5]
+
+            result = remove_background_on_export(input_path, output_path, replacement, replacement_value)
+            print(json.dumps({"output_path": result}))
+
+        else:
+            print(f"Unknown command: {command}", file=sys.stderr)
+            sys.exit(1)
+
+    except Exception as e:
+        print(json.dumps({"error": str(e)}), file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()