- Update generate_llvm_ir() to accept list of component dicts
- Process each component with own signal/handler state
- Scope signal globals with component name prefix (@signal_ComponentName_signalName)
- Add _signal_global() helper for scoped signal names
- Update tests for scoped signal names
- All tests passing (30/30)
- Add _emit_if() method to handle if statements
- Add _emit_expr() to evaluate signal references and constants
- Create basic blocks for then/else/merge
- Convert condition to i1 and branch
- Test passing: test_if_statement_codegen