feat(about): render tool version checks progressively per tool

Fan out the six tool version probes concurrently instead of awaiting
one sequential batch, so each tool card updates the moment its own
check finishes rather than waiting for the slowest one.

- loadAllToolVersions now calls refreshToolVersions per tool via
  Promise.all, reusing the existing per-name merge and per-tool
  loading flags
- card loading derives from per-tool state
  (loadingTools[t] || (isLoadingTools && !resolved)) so a resolved
  card leaves loading independently while the batch is still in flight
- WSL shell/flag selects reuse the per-card loading flag, matching the
  install/update buttons' early-enable behavior

This also drops total wall time from the sum of six sequential probes
to the slowest single probe. get_single_tool_version_impl is already
isolated and read-only (shared HTTP client, spawn_blocking subprocess,
no shared state), so concurrent probes are safe.

src/components/settings/AboutSection.tsx

@@ -288,18 +288,21 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
   const loadAllToolVersions = useCallback(async () => {
     setIsLoadingTools(true);
     try {
-      // Respect current UI overrides (shell / flag) when doing a full refresh.
-      const versions = await settingsApi.getToolVersions(
-        [...TOOL_NAMES],
-        wslShellByTool,
+      // 逐工具并发探测：每个工具一完成就合并进 toolVersions 并清掉自己的 loadingTools
+      // 标志，对应卡片随即独立刷新——而非等全部探测完才一次性显示（后端原本对 6 个工具
+      // 串行 await `--version` + 网络请求，总耗时是累加；并发后压成「最慢的那一个」）。
+      // 复用 refreshToolVersions：它已内建按 name 合并 + per-tool loading + 自身 try/catch
+      // 兜底（单工具失败返回 [] 不拖累其余），故 Promise.all 永不 reject。Respect current
+      // UI overrides (shell / flag) by passing wslShellByTool through.
+      await Promise.all(
+        TOOL_NAMES.map((toolName) =>
+          refreshToolVersions([toolName], wslShellByTool),
+        ),
       );
-      setToolVersions(versions);
-    } catch (error) {
-      console.error("[AboutSection] Failed to load tool versions", error);
     } finally {
       setIsLoadingTools(false);
     }
-  }, [wslShellByTool]);
+  }, [wslShellByTool, refreshToolVersions]);
 
   const handleToolShellChange = async (toolName: ToolName, value: string) => {
     const wslShell = value === "auto" ? null : value;
@@ -950,8 +953,14 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
             const tool = toolVersionByName.get(toolName);
             const appConfig = APP_ICON_MAP[TOOL_APP_IDS[toolName]];
             const displayName = TOOL_DISPLAY_NAMES[toolName];
+            // 单卡片 loading 用「结果是否已到」而非「整批是否结束」驱动，实现渐进式刷新：
+            //   - loadingTools[t]：本工具探测在途（首次加载或单工具刷新）；
+            //   - isLoadingTools && !has(t)：整批进行中且该工具尚未返回——覆盖首帧/刷新时
+            //     未完成卡片的 loading 外观。某工具结果一落进 toolVersions，has(t) 即为 true，
+            //     该卡片立刻脱离 loading（哪怕全局 isLoadingTools 还为 true），其它卡片不受影响。
             const isToolVersionLoading =
-              isLoadingTools || Boolean(loadingTools[toolName]);
+              Boolean(loadingTools[toolName]) ||
+              (isLoadingTools && !toolVersionByName.has(toolName));
             const isOutdated = isUpdateAvailable(
               tool?.version,
               tool?.latest_version,
@@ -1054,9 +1063,7 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
                     <Select
                       value={wslShellByTool[toolName]?.wslShell || "auto"}
                       onValueChange={(v) => handleToolShellChange(toolName, v)}
-                      disabled={
-                        isLoadingTools || loadingTools[toolName] || isAnyBusy
-                      }
+                      disabled={isToolVersionLoading || isAnyBusy}
                     >
                       <SelectTrigger className="h-7 w-[82px] text-xs">
                         <SelectValue />
@@ -1075,9 +1082,7 @@ export function AboutSection({ isPortable }: AboutSectionProps) {
                       onValueChange={(v) =>
                         handleToolShellFlagChange(toolName, v)
                       }
-                      disabled={
-                        isLoadingTools || loadingTools[toolName] || isAnyBusy
-                      }
+                      disabled={isToolVersionLoading || isAnyBusy}
                     >
                       <SelectTrigger className="h-7 w-[82px] text-xs">
                         <SelectValue />