修复被调用函数条件赋值状态合并

保留被调用函数内条件赋值前的既有 alias 状态
新增条件副作用同时可达真实与候选接收者的回归测试

apps/ai-game-creator-shell/src-tauri/src/agent/runtime_protocol/autonomous_completion.rs

@@ -4591,8 +4591,12 @@ fn javascript_apply_alias_transition(
         return;
     }
     if transition.conditional {
+        let had_state = state.resolved;
         state.indices.extend(transition.indices);
         state.resolved = true;
+        if !had_state {
+            state.conditional = true;
+        }
     } else {
         *state = transition;
     }
@@ -9582,6 +9586,19 @@ mod javascript_projection_reachability_tests {
         assert!(javascript_position_is_reachable(content, &ranges, decoy));
     }
 
+    #[test]
+    fn conditional_assignment_inside_an_invoked_function_preserves_prior_state() {
+        let content = "const real = { run() { return import('./real.mjs'); } }; const decoy = { run() { return import('./decoy.mjs'); } }; let receiver = real; function maybeSwap() { if (flag) receiver = decoy; } maybeSwap(); function start() { return receiver.run(); } start();";
+        let ranges = named_javascript_function_ranges(content);
+        for source in ["./real.mjs", "./decoy.mjs"] {
+            let position = content.find(source).expect("find conditional callee owner");
+            assert!(
+                javascript_position_is_reachable(content, &ranges, position),
+                "a conditional callee side effect must preserve both states: {source}",
+            );
+        }
+    }
+
     #[test]
     fn super_owner_is_fixed_when_the_class_is_defined() {
         let content = "let Base = class { run() { return import('./real-base.mjs'); } }; class Game extends Base { start() { return super.run(); } } Base = class { run() { return import('./decoy-base.mjs'); } }; new Game().start();";