校验Skill提及用户输入

为 canonical Skill part 增加名称边界校验

将 Skill 提及保留为 Codex 可识别的 $name 文本

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

@@ -36,6 +36,19 @@ pub(crate) fn validate_direct_codex_user_item(
                 reference_count = reference_count.saturating_add(1);
                 validate_resource_id_and_manifest(&manifest, resource_id)?;
             }
+            DirectCodexUserContentPart::AgcSkillReference { name } => {
+                let name = name.trim();
+                if name.is_empty()
+                    || name.len() > 120
+                    || name.chars().any(|character| {
+                        character.is_control()
+                            || character.is_whitespace()
+                            || matches!(character, '/' | '\\' | ':' | '$')
+                    })
+                {
+                    return Err("引用的 Skill 名称无效，请移除后重新选择".to_string());
+                }
+            }
             DirectCodexUserContentPart::AgcRuntimeRegionReference(reference) => {
                 reference_count = reference_count.saturating_add(1);
                 validate_runtime_region_reference(&manifest, reference)?;

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

@@ -77,6 +77,9 @@ pub(crate) fn direct_codex_user_item_to_wire_input(
                     resource_id.trim()
                 )
             }
+            DirectCodexUserContentPart::AgcSkillReference { name } => {
+                format!("${}", name.trim())
+            }
             DirectCodexUserContentPart::AgcRuntimeRegionReference(reference) => {
                 let resources = reference
                     .resource_ids