chore: 清理 emoji 与修正发布脚本仓库名

产品代码统一为纯文本风格（照参考实现），去掉 emoji：billing/quota/usage 插件、
channels 的提示文案、WebUI 文案，以及 go 测试、docs、packaging 脚本中的
注意/OK/FAIL 等符号化写法。第三方目录（vendor、node_modules、.probe）不动。

另：packaging/upload-release.sh 的仓库名改为真实全名
JianFeeeee/ModelRouter → HeNanMU-EEA/ModelRouter（前者是重定向，POST/PUT 不跟随
会 404）。

internal/lua/fire_parallel_test.go

@@ -79,7 +79,7 @@ return p
 	psOut := ps.Fire(StageRequestEnd, map[string]interface{}{"model": "m"})
 
 	if singleOut["who"] != "from-aaa" {
-		t.Errorf("★ single-plugin path dropped the return value: %v", singleOut)
+		t.Errorf("single-plugin path dropped the return value: %v", singleOut)
 	}
 	// Two plugins both return `who`; the merge order decides the winner, and it
 	// must be deterministic (load order), not scheduler-dependent.
@@ -120,7 +120,7 @@ return p
 	for i := 0; i < 60; i++ {
 		got := ps.Fire(StageRequestEnd, map[string]interface{}{"model": "m"})["winner"]
 		if got != first {
-			t.Fatalf("★ winner changed between runs: %q then %q — merge depends on goroutine "+
+			t.Fatalf("winner changed between runs: %q then %q — merge depends on goroutine "+
 				"scheduling, so the same configuration behaves differently run to run", first, got)
 		}
 	}
@@ -164,7 +164,7 @@ return p
 		t.Fatal("healthy plugin has no state")
 	}
 	if n := st["n"]; n != float64(1) {
-		t.Errorf("★ healthy plugin did not run alongside the throwing one: n = %v", n)
+		t.Errorf("healthy plugin did not run alongside the throwing one: n = %v", n)
 	}
 	he := ps.HookErrors()
 	if len(he) == 0 {