diff --git a/src-tauri/src/feat/effects.rs b/src-tauri/src/feat/effects.rs
index 93177df3b..e273bb8da 100644
--- a/src-tauri/src/feat/effects.rs
+++ b/src-tauri/src/feat/effects.rs
@@ -1,19 +1,20 @@
 use crate::config::IVerge;
 use std::collections::BTreeSet;
 
+/// Variant order defines execution dependency order.
 #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
 pub(super) enum Effect {
     RestartCore,
     ClashConfig,
     Autostart,
+    Language,
     SystemProxy,
-    TrayIcon,
     Hotkey,
     TrayMenu,
+    TrayIcon,
     TrayTooltip,
     TrayClick,
     Lightweight,
-    Language,
     LogLevel,
     LogFile,
 }
diff --git a/src-tauri/src/feat/executor.rs b/src-tauri/src/feat/executor.rs
index c301a6975..375a1e227 100644
--- a/src-tauri/src/feat/executor.rs
+++ b/src-tauri/src/feat/executor.rs
@@ -20,22 +20,6 @@ pub(super) enum Patch<'a> {
     Clash(&'a Mapping),
 }
 
-const EFFECT_ORDER: &[Effect] = &[
-    Effect::RestartCore,
-    Effect::ClashConfig,
-    Effect::Autostart,
-    Effect::Language,
-    Effect::SystemProxy,
-    Effect::Hotkey,
-    Effect::TrayMenu,
-    Effect::TrayIcon,
-    Effect::TrayTooltip,
-    Effect::TrayClick,
-    Effect::Lightweight,
-    Effect::LogLevel,
-    Effect::LogFile,
-];
-
 async fn ensure_restart(manager: &CoreManager) -> Result<()> {
     Config::generate().await?;
     let previous = manager.current_core_readiness_generation();
@@ -143,15 +127,13 @@ pub(super) async fn apply(config_write: &MutexGuard<'_, ()>, patch: Patch<'_>, e
         Patch::Clash(patch) => clash.edit_draft(|draft| draft.patch_config(patch)),
     }
     let result: Result<()> = async {
-        for &effect in EFFECT_ORDER {
-            if effects.contains(&effect) {
-                let result = Box::pin(ensure_effect(effect, verge_patch, manager, &update)).await;
-                if matches!(patch, Patch::Clash(_)) && matches!(effect, Effect::TrayMenu | Effect::TrayIcon) {
-                    // Tray failures must not reject an applied Clash mode change.
-                    logging_error!(Type::Tray, result);
-                } else {
-                    result?;
-                }
+        for effect in effects.iter().copied() {
+            let result = Box::pin(ensure_effect(effect, verge_patch, manager, &update)).await;
+            if matches!(patch, Patch::Clash(_)) && matches!(effect, Effect::TrayMenu | Effect::TrayIcon) {
+                // Tray failures must not reject an applied Clash mode change.
+                logging_error!(Type::Tray, result);
+            } else {
+                result?;
             }
         }
         match patch {
diff --git a/src/hooks/use-profiles.ts b/src/hooks/use-profiles.ts
index 8cf654765..306013afa 100644
--- a/src/hooks/use-profiles.ts
+++ b/src/hooks/use-profiles.ts
@@ -56,7 +56,7 @@ export const useProfiles = () => {
 
         if (!result.ok) {
           // Backend Busy keeps local state untouched, as before.
-          return result.value ?? { status: 'busy' }
+          return result.value
         }
         const outcome = result.value
         if (outcome.status !== 'valid' && outcome.status !== 'busy') {
diff --git a/src/pages/profiles.tsx b/src/pages/profiles.tsx
index aee5dc484..85d7d78b2 100644
--- a/src/pages/profiles.tsx
+++ b/src/pages/profiles.tsx
@@ -530,13 +530,7 @@ const ProfilePage = () => {
   const loadingCache = useProfileLoadingCache()
   const { updateRevisions: completedUpdateRevisions, timerRevisions } =
     useProfileUpdates()
-  const setStoreLoadingProfiles = useSetProfileLoading()
-  const setLoadingProfiles = useCallback(
-    (uids: string[], loading: boolean) => {
-      setStoreLoadingProfiles(uids, loading)
-    },
-    [setStoreLoadingProfiles],
-  )
+  const setLoadingProfiles = useSetProfileLoading()
 
   const runProfileUpdates = useCallback(
     async (uids: string[]) => {
diff --git a/src/services/bus/create-bus-handlers.test.ts b/src/services/bus/create-bus-handlers.test.ts
index 43d910e40..33bd6d602 100644
--- a/src/services/bus/create-bus-handlers.test.ts
+++ b/src/services/bus/create-bus-handlers.test.ts
@@ -54,8 +54,6 @@ const mountBus = async () => {
       notice(status, message, (key) => key, vi.fn())
     },
     revalidateKeys: (keys) => void revalidateQueries(keys.map((key) => [key])),
-    revalidateProfiles: () => {},
-    refreshProxyView: () => {},
     readPendingFailures: () => {},
     readRunState: () => {},
   })
diff --git a/src/services/bus/create-bus-handlers.ts b/src/services/bus/create-bus-handlers.ts
index 985951e51..957589ea7 100644
--- a/src/services/bus/create-bus-handlers.ts
+++ b/src/services/bus/create-bus-handlers.ts
@@ -20,22 +20,12 @@ export interface BusHandlerDeps {
   /** Notice-table entry point; layout owns t/navigate wiring. */
   handleNotice: (payload: [string, string]) => void
   revalidateKeys: (keys: readonly string[]) => void
-  revalidateProfiles: () => void
-  refreshProxyView: () => void
   /** Re-read the backend pending-failure snapshot into the store. */
   readPendingFailures: () => void
   /** Re-read the run-state snapshot into the store. */
   readRunState: () => void
 }
 
-export interface EventBus {
-  handlers: BusHandlers
-  /** Re-read event-only state after listeners are live (initial race window). */
-  onSubscribed: () => void
-  /** The window regained focus: replay a possibly recovered startup error. */
-  onWindowFocus: () => void
-}
-
 /**
  * Pure per-event handler table for the bus. Handlers may trigger documented
  * side effects (SWR revalidation, notice toasts) but write store state only
@@ -43,7 +33,7 @@ export interface EventBus {
  * throttles below live in the returned closure, mirroring the previous
  * scattered listeners.
  */
-export const createEventBus = (deps: BusHandlerDeps): EventBus => {
+export const createEventBus = (deps: BusHandlerDeps) => {
   let lastProfileId: string | null = null
   let lastProfileChangeTime = 0
   let lastProxyRefreshTime = 0
@@ -59,14 +49,14 @@ export const createEventBus = (deps: BusHandlerDeps): EventBus => {
     }
     lastProfileId = newProfileId
     lastProfileChangeTime = now
-    deps.revalidateProfiles()
+    deps.revalidateKeys(['getProfiles'])
   }
 
   const handleRefreshProxyConfig = () => {
     const now = Date.now()
     if (now - lastProxyRefreshTime <= refreshThrottle) return
     lastProxyRefreshTime = now
-    deps.refreshProxyView()
+    deps.revalidateKeys(['getProxyView'])
   }
 
   const handlers: BusHandlers = {
@@ -87,7 +77,7 @@ export const createEventBus = (deps: BusHandlerDeps): EventBus => {
         'getSystemProxy',
         'getAutotemProxy',
       ]),
-    'verge://refresh-profiles': () => deps.revalidateProfiles(),
+    'verge://refresh-profiles': () => deps.revalidateKeys(['getProfiles']),
     'verge://refresh-proxy-config': handleRefreshProxyConfig,
     'verge://notice-message': (payload) => deps.handleNotice(payload),
     'profile-changed': handleProfileChanged,
@@ -97,7 +87,7 @@ export const createEventBus = (deps: BusHandlerDeps): EventBus => {
       deps.dispatch({ type: 'profileUpdate/started', uid }),
     'profile-update-completed': ({ uid }) => {
       deps.dispatch({ type: 'profileUpdate/completed', uid })
-      deps.revalidateProfiles()
+      deps.revalidateKeys(['getProfiles'])
     },
     'verge://run-state-changed': (payload) => {
       deps.dispatch({ type: 'runState/loaded', runState: payload })
@@ -106,7 +96,7 @@ export const createEventBus = (deps: BusHandlerDeps): EventBus => {
     },
     'verge://pending-failures-changed': () => deps.readPendingFailures(),
     [TEST_ALL_EVENT]: () => deps.dispatch({ type: 'testAll/requested' }),
-  } as BusHandlers
+  }
 
   const onSubscribed = () => {
     // Run state is read after subscribing so an event racing the store's
diff --git a/src/services/bus/use-event-bus.test.ts b/src/services/bus/use-event-bus.test.ts
index 13ba8f138..106503d02 100644
--- a/src/services/bus/use-event-bus.test.ts
+++ b/src/services/bus/use-event-bus.test.ts
@@ -45,28 +45,6 @@ beforeEach(() => {
   listen.mockImplementation(() => Promise.resolve(() => {}))
 })
 
-it('registers exactly one listener per contract event plus test-all', () => {
-  useEventBus(handleNotice)
-
-  const names = listen.mock.calls.map(([name]) => name)
-  expect(names.sort()).toEqual(
-    [
-      'verge://refresh-clash-config',
-      'verge://refresh-verge-config',
-      'verge://refresh-profiles',
-      'verge://refresh-proxy-config',
-      'verge://notice-message',
-      'profile-changed',
-      'verge://timer-updated',
-      'profile-update-started',
-      'profile-update-completed',
-      'verge://run-state-changed',
-      'verge://pending-failures-changed',
-      'verge://test-all',
-    ].sort(),
-  )
-})
-
 it('drains event-only state only after every listener is registered', async () => {
   const registrations: Array<() => void> = []
   listen.mockImplementation(
diff --git a/src/services/bus/use-event-bus.ts b/src/services/bus/use-event-bus.ts
index 8c22e10ed..ea64c0100 100644
--- a/src/services/bus/use-event-bus.ts
+++ b/src/services/bus/use-event-bus.ts
@@ -31,10 +31,6 @@ export const useEventBus = (
       dispatch,
       handleNotice,
       revalidateKeys,
-      revalidateProfiles: () => {
-        void revalidateQueries([['getProfiles']])
-      },
-      refreshProxyView: () => revalidateKeys(['getProxyView']),
       readPendingFailures,
       readRunState,
     })
diff --git a/src/services/mutate.ts b/src/services/mutate.ts
index 269629a90..decf95bf9 100644
--- a/src/services/mutate.ts
+++ b/src/services/mutate.ts
@@ -14,12 +14,10 @@ export interface MutateOptions<T> {
   /** Shown after a fulfilled result (most flows leave this to backend notices). */
   successNotice?: MutateNoticeInput
   /** `false` suppresses the default error toast. */
-  errorNotice?: false | MutateNoticeInput
+  errorNotice?: false
 }
 
-export type MutateResult<T> =
-  | { ok: true; value: T }
-  | { ok: false; busy: true; value?: T }
+export type MutateResult<T> = { ok: true; value: T } | { ok: false; value: T }
 
 /** ValidationOutcome-shaped results report backend-side Busy rejection this way. */
 const isBusyOutcome = (value: unknown): boolean =>
@@ -44,7 +42,7 @@ export async function mutate<T>(
   try {
     const value = await invoke()
     if (isBusyOutcome(value)) {
-      return { ok: false, busy: true, value }
+      return { ok: false, value }
     }
     options.onFulfilled?.(value)
     if (options.revalidate?.length) {
@@ -56,9 +54,7 @@ export async function mutate<T>(
     return { ok: true, value }
   } catch (error) {
     if (options.errorNotice !== false) {
-      showNotice.error(
-        options.errorNotice !== undefined ? options.errorNotice : error,
-      )
+      showNotice.error(error)
     }
     throw error
   } finally {