fix: Correct HttpRequestBox method_id mapping in nyash.toml

Fixed the method ID order in HttpRequestBox configuration to match plugin implementation:
- path: method_id 1 (was incorrectly 2)
- readBody: method_id 2 (was incorrectly 3)
- respond: method_id 3 (was incorrectly 1)

This resolves the 45-day debugging issue where req.respond(resp) was calling
the wrong plugin method, causing HTTP responses to have empty bodies.

All E2E tests now pass:
- e2e_http_stub_end_to_end ✅
- e2e_http_multiple_requests_order ✅
- e2e_http_post_and_headers ✅
- e2e_http_server_restart ✅
- e2e_http_server_shutdown_and_restart ✅

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/interpreter/methods/io_methods.rs

@@ -8,7 +8,8 @@
  */
 
 use super::super::*;
-use crate::box_trait::{ResultBox, StringBox, NyashBox};
+use crate::boxes::ResultBox;
+use crate::box_trait::{StringBox, NyashBox};
 use crate::boxes::FileBox;
 // use crate::bid::plugin_box::PluginFileBox;  // legacy - FileBox専用
 
@@ -77,7 +78,7 @@ impl NyashInterpreter {
     pub(in crate::interpreter) fn execute_result_method(&mut self, result_box: &ResultBox, method: &str, arguments: &[ASTNode]) 
         -> Result<Box<dyn NyashBox>, RuntimeError> {
         match method {
-            "isOk" => {
+            "isOk" | "is_ok" => {
                 if !arguments.is_empty() {
                     return Err(RuntimeError::InvalidOperation {
                         message: format!("isOk() expects 0 arguments, got {}", arguments.len()),
@@ -85,7 +86,7 @@ impl NyashInterpreter {
                 }
                 Ok(result_box.is_ok())
             }
-            "getValue" => {
+            "getValue" | "get_value" => {
                 if !arguments.is_empty() {
                     return Err(RuntimeError::InvalidOperation {
                         message: format!("getValue() expects 0 arguments, got {}", arguments.len()),
@@ -93,7 +94,7 @@ impl NyashInterpreter {
                 }
                 Ok(result_box.get_value())
             }
-            "getError" => {
+            "getError" | "get_error" => {
                 if !arguments.is_empty() {
                     return Err(RuntimeError::InvalidOperation {
                         message: format!("getError() expects 0 arguments, got {}", arguments.len()),
@@ -343,4 +344,4 @@ impl NyashInterpreter {
         self.execute_plugin_method_generic(plugin_file_box, method, arguments)
     }
     */
-}
+}