feat: continue tree rust family cutover

- add rust renderer/state-family scaffolds and inline compat host thinning for page tree, file tree, and picker
- route tree/filetree preflight, file projection, resource artifact, and stream delta contracts through rust plans
- preserve canonical move-order validation, file-tree search projection, and related frontend/runtime regression coverage

rust/crates/bridge-runtime/src/main.rs

@@ -1,7 +1,8 @@
 use std::io::{self, Read};
 
 use bridge_runtime::{
-    build_failure_response, build_success_response, execute_runtime_input, execute_runtime_query,
+    build_artifact_success_response, build_failure_response, build_success_response,
+    execute_runtime_command_artifact, execute_runtime_input, execute_runtime_query,
     runtime_input_requests_result, RuntimeFailure, RuntimeInput,
 };
 use storage_convex_bridge::{BridgeError, BridgeErrorKind};
@@ -26,7 +27,16 @@ fn main() {
         }
     };
 
-    if runtime_input_requests_result(&runtime_input) {
+    if matches!(runtime_input, RuntimeInput::CommandArtifact { .. }) {
+        match execute_runtime_command_artifact(runtime_input) {
+            Ok(artifacts) => {
+                let payload = serde_json::to_string(&build_artifact_success_response(artifacts))
+                    .expect("bridge runtime artifact 成功响应必须可序列化");
+                println!("{payload}");
+            }
+            Err(error) => emit_failure(error),
+        }
+    } else if runtime_input_requests_result(&runtime_input) {
         match execute_runtime_query(runtime_input) {
             Ok(result) => {
                 let payload = serde_json::to_string(&serde_json::json!({