Improve startup responsiveness and admin prompt motion

.agent/skills/rust-tauri-backend/SKILL.md

@@ -32,6 +32,14 @@ pub async fn some_command(input: SomeInput) -> Result<SomeOutput, CommandError>
 
 Implementation function должна быть тестируемой без Tauri runtime, если возможно.
 
+## Startup responsiveness
+
+- Keep first paint independent from network access, subscription refresh, and slow component detection.
+- Run independent startup probes concurrently and outside the async runtime thread. Do not serialize ProxiFyre, sing-box, service, and admin checks without a dependency between them.
+- Give external or process-heavy probes a bounded timeout and return partial status when one probe is slow or unavailable.
+- Load saved configuration and other cheap state first. Let the UI render it while detection results update separately or through a partial startup snapshot.
+- Do not fail the entire startup snapshot because one optional component cannot be detected. Preserve structured per-component errors or unknown/checking state.
+
 ## DTO boundary
 
 При добавлении или изменении command:
@@ -89,6 +97,7 @@ services/singbox_service.rs
 - `cargo clippy --all-targets --all-features -- -D warnings`
 - `cargo test --all-targets`
 - Relevant Windows/manual check if touching service/install/elevation.
+- When changing startup aggregation, verify that one delayed or failed probe does not postpone unrelated saved state or component results.
 
 Если `cargo` недоступен в среде, честно написать, что backend проверен только статически. Не изображать компилятор, у него и так тяжелая жизнь.