初始提交：短剧库源码（含转码优化 ultrafast）

internal/app/playback_history_source_test.go

@@ -0,0 +1,23 @@
+package app
+
+import "testing"
+
+func TestPlaybackHistorySourceIdentity(t *testing.T) {
+	for _, input := range []struct{ id, source string }{
+		{"hongguo:7000000000000000001", "hongguo"},
+		{"huangdou:123", "huangdou"},
+		{"huangguoai:456", "huangguoai"},
+		{"huangguo-video:789", "huangguo-video"},
+		{"legacy-123", "cloudfront"},
+	} {
+		id, source, valid := playbackHistoryIdentity(input.id)
+		if !valid || id != input.id || source != input.source {
+			t.Fatal(input, id, source, valid)
+		}
+	}
+	for _, invalid := range []string{"", "unsupported:123", "../data", "https://example.invalid", "123\n456"} {
+		if _, _, valid := playbackHistoryIdentity(invalid); valid {
+			t.Fatal("invalid history identity accepted", invalid)
+		}
+	}
+}