feat(app-controller): modularize handlers and enforce 1-space indentation

check_indent.py

@@ -0,0 +1,20 @@
+
+import sys
+
+def check_indent(file_path):
+ with open(file_path, 'r', encoding='utf-8') as f:
+  lines = f.readlines()
+ 
+ last_indent = 0
+ for i, line in enumerate(lines):
+  stripped = line.lstrip()
+  if not stripped:
+   continue
+  
+  indent = len(line) - len(line.lstrip())
+  if indent > last_indent + 1:
+   print(f"Jump at line {i+1}: '{line.rstrip()}' (Indent: {indent}, Last: {last_indent})")
+  last_indent = indent
+
+if __name__ == '__main__':
+ check_indent('src/app_controller.py')