kind 白名单从 DirectResourceGenerationKind::ALL 取，删掉第二份字符串清单

- DirectResourceGenerationKind 新增 ALL: [Self; 5]，顺序与 parse/as_str 一致
- KindUnsupported 的「只允许 …」改为由 ALL 生成，新增 kind 时不再需要手动同步这句文案
- 文案字面不变：image、video、character-animation、sound-effect、background-music

验证：cargo fmt --all --manifest-path apps/ai-game-creator-shell/src-tauri/Cargo.toml -- --check 通过

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

@@ -203,6 +203,16 @@ pub(crate) enum DirectResourceGenerationKind {
 }
 
 impl DirectResourceGenerationKind {
+    /// 全部受支持的 kind，顺序与 `parse`/`as_str` 一致；需要把清单讲给模型听的文案从这里取，
+    /// 免得新增 kind 时留下第二份会漂移的字符串白名单。
+    pub(crate) const ALL: [Self; 5] = [
+        Self::Image,
+        Self::Video,
+        Self::CharacterAnimation,
+        Self::SoundEffect,
+        Self::BackgroundMusic,
+    ];
+
     pub(crate) fn parse(value: &str) -> Result<Self, String> {
         match value {
             "image" => Ok(Self::Image),

apps/ai-game-creator-shell/src-tauri/src/agent/tool/create_or_derive_resource/error.rs

@@ -141,9 +141,14 @@ impl ToolFailure for CreateOrDeriveResourceError {
             Self::KindNotText { got } => format!(
                 "生成或派生资源失败：kind 必须是字符串，当前是「{got}」。"
             ),
-            Self::KindUnsupported { got } => format!(
-                "生成或派生资源失败：kind「{got}」不是受支持的媒体资源类型，只允许 image、video、character-animation、sound-effect、background-music。"
-            ),
+            Self::KindUnsupported { got } => {
+                let allowed = DirectResourceGenerationKind::ALL
+                    .into_iter()
+                    .map(DirectResourceGenerationKind::as_str)
+                    .collect::<Vec<_>>()
+                    .join("、");
+                format!("生成或派生资源失败：kind「{got}」不是受支持的媒体资源类型，只允许 {allowed}。")
+            }
             Self::ModeEmpty => "生成或派生资源失败：mode 不能为空。".to_string(),
             Self::ModeTooLong {
                 got_chars,