iter(g207): progress 支持自定义进度文本

.ua/index.json

@@ -1,6 +1,6 @@
 {
   "$schema": "ui-arch-registry-index/0.1",
-  "generatedAt": "2026-10-26T11:16:26.554Z",
+  "generatedAt": "2026-10-26T11:17:54.464Z",
   "repoRoot": ".",
   "packages": [
     {
@@ -1412,6 +1412,12 @@
                 "n": "variant",
                 "t": "'default' | 'success' | 'warning' | 'danger'",
                 "d": "填充语义色；缺省 default（满格自动切 success）"
+              },
+              {
+                "n": "format",
+                "t": "(v: number) => string",
+                "k": 1,
+                "d": "文本自定义：传入则线/环形的进度文本用其返回值替代默认「N%」；缺省取整百分比"
               }
             ],
             "example": "const pct = signal(0); progress({ value: pct }); setInterval(() => pct((pct() + 5) % 105), 400)",