feat: profile-aware cache isolation and UX improvements

- Fix chat store cache keys to include profile name, prevent data leaking between profiles
- Defer cache hydration to after profile load to avoid race condition
- Remove collapsible sidebar feature (not needed)
- Remove confirmation dialog on profile switch (direct reload)
- Auto-start gateway when creating new profile
- Clear profile-specific localStorage cache on profile delete (safe prefix matching)
- Clean up unused imports in SettingsView

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/stores/hermes/profiles.ts

@@ -3,8 +3,12 @@ import { ref } from 'vue'
 import * as profilesApi from '@/api/hermes/profiles'
 import type { HermesProfile, HermesProfileDetail } from '@/api/hermes/profiles'
 
+const ACTIVE_PROFILE_STORAGE_KEY = 'hermes_active_profile_name'
+
 export const useProfilesStore = defineStore('profiles', () => {
   const profiles = ref<HermesProfile[]>([])
+  // 初始化时同步读 localStorage，确保其他 store（如 chat）在启动时能拿到 profile name
+  const activeProfileName = ref<string | null>(localStorage.getItem(ACTIVE_PROFILE_STORAGE_KEY))
   const activeProfile = ref<HermesProfile | null>(null)
   const detailMap = ref<Record<string, HermesProfileDetail>>({})
   const loading = ref(false)
@@ -15,6 +19,11 @@ export const useProfilesStore = defineStore('profiles', () => {
     try {
       profiles.value = await profilesApi.fetchProfiles()
       activeProfile.value = profiles.value.find(p => p.active) ?? null
+      // 同步缓存 profile name，供其他 store 启动时读取
+      if (activeProfile.value) {
+        activeProfileName.value = activeProfile.value.name
+        localStorage.setItem(ACTIVE_PROFILE_STORAGE_KEY, activeProfile.value.name)
+      }
     } catch (err) {
       console.error('Failed to fetch profiles:', err)
     } finally {
@@ -43,11 +52,31 @@ export const useProfilesStore = defineStore('profiles', () => {
     const ok = await profilesApi.deleteProfile(name)
     if (ok) {
       delete detailMap.value[name]
+      // 清理该 profile 的 localStorage 缓存
+      clearProfileCache(name)
       await fetchProfiles()
     }
     return ok
   }
 
+  // 清理指定 profile 的所有 localStorage 缓存（精确匹配缓存 key 前缀）
+  function clearProfileCache(profileName: string) {
+    const prefixes = [
+      `hermes_sessions_cache_v1_${profileName}`,
+      `hermes_session_msgs_v1_${profileName}_`,
+      `hermes_in_flight_v1_${profileName}_`,
+      `hermes_active_session_${profileName}`,
+    ]
+    const keysToRemove: string[] = []
+    for (let i = 0; i < localStorage.length; i++) {
+      const key = localStorage.key(i)
+      if (key && prefixes.some(p => key.startsWith(p))) {
+        keysToRemove.push(key)
+      }
+    }
+    keysToRemove.forEach(key => localStorage.removeItem(key))
+  }
+
   async function renameProfile(name: string, newName: string) {
     const ok = await profilesApi.renameProfile(name, newName)
     if (ok) {
@@ -81,6 +110,7 @@ export const useProfilesStore = defineStore('profiles', () => {
   return {
     profiles,
     activeProfile,
+    activeProfileName,
     detailMap,
     loading,
     switching,