Add component parameter support and fix JS runtime

- Emit function parameters in component signature
- JS runtime passes props as positional arguments
- Remove incorrect return value handling (components call js_set_root internally)
- Enables: def Tabs(orientation=0)
- All tests passing (30/30)

examples/runtime/ritz-runtime.js

@@ -277,12 +277,8 @@ class RitzLoader {
             }
 
             // Pass props as positional arguments
-            // Components now RETURN the root element ID instead of calling js_set_root
             const propValues = Object.values(props);
-            const rootElementId = renderFn(...propValues);
-
-            // Mount the returned element to the DOM
-            runtime.js_set_root(rootElementId);
+            renderFn(...propValues);
 
             // Update signals
             runtime.updateSignals();

examples/tabs/Tabs.ll

@@ -299,7 +299,7 @@ entry:
 }
 
 ; Component render function
-define void @render_Tabs() {
+define void @render_Tabs(i32 %orientation) {
 entry:
   %var56 = call i32 @js_create_element(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.0, i32 0, i32 0))
   call void @js_set_attribute(i32 %var56, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.1, i32 0, i32 0), i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.28, i32 0, i32 0))

ritz/llvm_codegen_signals.py

@@ -196,8 +196,17 @@ class SignalLLVMIRGenerator:
     def _emit_component(self, ir: dict[str, Any]) -> None:
         """Emit component render function."""
         component_name = ir["name"]
+
+        # Build parameter list
+        params = ir.get("params", [])
+        param_list = []
+        for param in params:
+            # For now, all params are i32
+            param_list.append(f"i32 %{param['name']}")
+        param_str = ", ".join(param_list) if param_list else ""
+
         self.lines.append("; Component render function")
-        self.lines.append(f"define void @render_{component_name}() {{")
+        self.lines.append(f"define void @render_{component_name}({param_str}) {{")
         self.lines.append("entry:")
 
         # Process component body (skip signals and functions, already handled)