refactor: DRY pass on frontend — shared palette, composable, and tab loader

- Extract milestoneColor to utils/palette.ts; remove duplicate in HomeView + ProjectListView
- Create useBackgroundRefresh composable; wire into HomeView + BriefingView (removes manual setInterval/clearInterval boilerplate)
- Extract _loadTabContent() in SettingsView so watch and onMounted share one tab→loader mapping
- Move raw fetch() api-key calls to typed helpers in api/client.ts (listApiKeys, createApiKey, revokeApiKey)
- Drop unused onUnmounted import from BriefingView

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

frontend/src/api/client.ts

@@ -580,3 +580,21 @@ export async function updateEvent(id: number, payload: EventUpdatePayload): Prom
 export async function deleteEvent(id: number): Promise<void> {
   return apiDelete(`/api/events/${id}`);
 }
+
+// ─── API Keys ─────────────────────────────────────────────────────────────────
+
+export interface ApiKeyEntry {
+  id: number
+  name: string
+  scope: string
+  key_prefix: string
+  last_used_at: string | null
+}
+
+export const listApiKeys = () =>
+  apiGet<{ api_keys: ApiKeyEntry[] }>('/api/api-keys').then(r => r.api_keys)
+
+export const createApiKey = (name: string, scope: 'read' | 'write') =>
+  apiPost<{ key: string; api_key: ApiKeyEntry }>('/api/api-keys', { name, scope })
+
+export const revokeApiKey = (id: number) => apiDelete(`/api/api-keys/${id}`)

frontend/src/composables/useBackgroundRefresh.ts

@@ -0,0 +1,29 @@
+import { onMounted, onUnmounted } from 'vue'
+
+/**
+ * Runs `refreshFn` on a recurring interval while the page is visible.
+ * Safe to use in any component — timer is cleared on unmount.
+ *
+ * @param refreshFn   Called each tick. Should be silent (no loading state changes).
+ * @param intervalMs  Polling interval in milliseconds.
+ * @param canRun      Optional guard — refresh is skipped when this returns false.
+ */
+export function useBackgroundRefresh(
+  refreshFn: () => void,
+  intervalMs: number,
+  canRun?: () => boolean,
+): void {
+  let timer: ReturnType<typeof setInterval> | null = null
+
+  onMounted(() => {
+    timer = setInterval(() => {
+      if (document.hidden) return
+      if (canRun && !canRun()) return
+      refreshFn()
+    }, intervalMs)
+  })
+
+  onUnmounted(() => {
+    if (timer !== null) clearInterval(timer)
+  })
+}

frontend/src/utils/palette.ts

@@ -0,0 +1,13 @@
+/** Cyclic color palette for milestone progress bars. */
+export const MILESTONE_PALETTE = [
+  'var(--color-primary)',
+  'var(--color-success, #22c55e)',
+  '#c98a00',
+  '#8b5cf6',
+  'var(--color-danger, #ef4444)',
+  '#06b6d4',
+]
+
+export function milestoneColor(index: number): string {
+  return MILESTONE_PALETTE[index % MILESTONE_PALETTE.length]
+}

frontend/src/views/BriefingView.vue

@@ -1,5 +1,6 @@
 <script setup lang="ts">
-import { ref, computed, onMounted, onUnmounted, watch } from 'vue'
+import { ref, computed, onMounted, watch } from 'vue'
+import { useBackgroundRefresh } from '@/composables/useBackgroundRefresh'
 import { useChatStore } from '@/stores/chat'
 import ChatMessage from '@/components/ChatMessage.vue'
 import WeatherCard from '@/components/WeatherCard.vue'
@@ -190,10 +191,7 @@ function toMsg(m: BriefingMessage): Message {
 }
 
 // ─── Background refresh (no-flicker) ─────────────────────────────────────────
-let _refreshTimer: ReturnType<typeof setInterval> | null = null
-
 async function _backgroundRefreshMessages() {
-  if (document.hidden || chatStore.streaming || !isToday.value || !todayConvId.value) return
   try {
     const today = await getBriefingToday()
     if (!today) return
@@ -206,14 +204,15 @@ async function _backgroundRefreshMessages() {
   } catch { /* silent — don't disturb the UI on network hiccup */ }
 }
 
+useBackgroundRefresh(
+  _backgroundRefreshMessages,
+  60_000,
+  () => !chatStore.streaming && isToday.value && !!todayConvId.value,
+)
+
 onMounted(async () => {
   await checkSetup()
   if (!showWizard.value) await loadAll()
-  _refreshTimer = setInterval(_backgroundRefreshMessages, 60_000)
-})
-
-onUnmounted(() => {
-  if (_refreshTimer !== null) clearInterval(_refreshTimer)
 })
 </script>
 

frontend/src/views/HomeView.vue

@@ -1,6 +1,8 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted } from "vue";
 import { apiGet, listEvents } from "@/api/client";
+import { useBackgroundRefresh } from "@/composables/useBackgroundRefresh";
+import { milestoneColor } from "@/utils/palette";
 import type { Note } from "@/types/note";
 import type { Task, TaskListResponse, TaskStatus } from "@/types/task";
 import type { ToolCallRecord, Message } from "@/types/chat";
@@ -69,24 +71,8 @@ const upcomingEvents = ref<EventEntry[]>([]);
 const eventSlideOverOpen = ref(false);
 const editingEvent = ref<EventEntry | null>(null);
 
-// ─── Milestone color palette ──────────────────────────────────────────────────
-
-function milestoneColor(index: number): string {
-  const palette = [
-    "var(--color-primary)",
-    "var(--color-success, #22c55e)",
-    "#c98a00",
-    "var(--color-danger, #e74c3c)",
-    "#8b5cf6",
-  ];
-  return palette[index % palette.length];
-}
-
 // ─── Background refresh (no-flicker) ─────────────────────────────────────────
-// Runs on a timer while the page is visible. Never touches `loading` so
-// existing content stays on screen while the fetch is in flight.
-
-let _refreshTimer: ReturnType<typeof setInterval> | null = null
+// Never touches `loading` so existing content stays on screen while fetching.
 
 function _dateRange() {
   const today = new Date()
@@ -173,9 +159,10 @@ onMounted(async () => {
   chatInputRef.value?.focus();
   loadProjects();
 
-  _refreshTimer = setInterval(_backgroundRefresh, 90_000)
 });
 
+useBackgroundRefresh(_backgroundRefresh, 90_000, () => !loading.value);
+
 async function loadProjects() {
   if (!heroProject.value) return;
   const hid = heroProject.value.id;
@@ -239,7 +226,6 @@ onMounted(() => {
 });
 onUnmounted(() => {
   document.removeEventListener("shortcut:focus-chat", onFocusChatShortcut);
-  if (_refreshTimer !== null) clearInterval(_refreshTimer)
 });
 
 const chatStore = useChatStore();

frontend/src/views/ProjectListView.vue

@@ -3,6 +3,7 @@ import { ref, computed, onMounted } from "vue";
 import { useRouter } from "vue-router";
 import { apiGet, apiPost } from "@/api/client";
 import { useToastStore } from "@/stores/toast";
+import { milestoneColor } from "@/utils/palette";
 
 interface MilestoneSummary {
   id: number;
@@ -73,17 +74,6 @@ async function loadProjects() {
   }
 }
 
-function milestoneColor(index: number): string {
-  const palette = [
-    "var(--color-primary)",
-    "var(--color-success)",
-    "#c98a00",
-    "#8b5cf6",
-    "#ef4444",
-    "#06b6d4",
-  ];
-  return palette[index % palette.length];
-}
 
 onMounted(loadProjects);
 

frontend/src/views/SettingsView.vue

@@ -3,7 +3,7 @@ import { ref, watch, onMounted } from "vue";
 import { useSettingsStore } from "@/stores/settings";
 import { useAuthStore } from "@/stores/auth";
 import { useToastStore } from "@/stores/toast";
-import { apiGet, apiPost, apiPut, apiDelete, listGroups, createGroup, deleteGroup, listGroupMembers, addGroupMember, removeGroupMember, searchUsers, getBriefingConfig, saveBriefingConfig, getBriefingFeeds, createBriefingFeed, deleteBriefingFeed, refreshBriefingFeeds, geocodeAddress, getFableMcpInfo, type GroupEntry, type GroupMember, type UserSearchResult, type BriefingConfig, type BriefingFeed } from "@/api/client";
+import { apiGet, apiPost, apiPut, apiDelete, listGroups, createGroup, deleteGroup, listGroupMembers, addGroupMember, removeGroupMember, searchUsers, getBriefingConfig, saveBriefingConfig, getBriefingFeeds, createBriefingFeed, deleteBriefingFeed, refreshBriefingFeeds, geocodeAddress, getFableMcpInfo, listApiKeys, createApiKey as apiCreateApiKey, revokeApiKey as apiRevokeApiKey, type ApiKeyEntry, type GroupEntry, type GroupMember, type UserSearchResult, type BriefingConfig, type BriefingFeed } from "@/api/client";
 import { usePushStore } from "@/stores/push";
 import type { User } from "@/types/auth";
 import PaginationBar from "@/components/PaginationBar.vue";
@@ -43,17 +43,24 @@ const restoreFileInput = ref<HTMLInputElement | null>(null);
 const VALID_TABS = new Set(["general", "account", "notifications", "integrations", "data", "briefing", "apikeys", "config", "users", "logs", "groups"]);
 const _stored = localStorage.getItem("settings_tab") ?? "general";
 const activeTab = ref(VALID_TABS.has(_stored) ? (_stored === "admin" ? "config" : _stored) : "general");
+
+function _loadTabContent(tab: string) {
+  if (authStore.isAdmin) {
+    if (tab === "users") loadUsersPanel();
+    else if (tab === "logs") loadLogsPanel();
+    else if (tab === "groups") loadGroupsPanel();
+  }
+  if (tab === "briefing") loadBriefingTab();
+  if (tab === "apikeys") { fetchApiKeys(); loadMcpInfo(); }
+}
+
 watch(activeTab, (v) => {
   localStorage.setItem("settings_tab", v === "admin" ? "config" : v);
-  if (v === "users" && authStore.isAdmin) loadUsersPanel();
-  if (v === "logs" && authStore.isAdmin) loadLogsPanel();
-  if (v === "groups" && authStore.isAdmin) loadGroupsPanel();
-  if (v === "briefing") loadBriefingTab();
-  if (v === "apikeys") { fetchApiKeys(); loadMcpInfo(); }
+  _loadTabContent(v);
 });
 
 // API Keys
-const apiKeys = ref<Array<{id: number, name: string, scope: string, key_prefix: string, last_used_at: string | null}>>([]);
+const apiKeys = ref<ApiKeyEntry[]>([]);
 const newKeyName = ref('');
 const newKeyScope = ref<'read' | 'write'>('write');
 const newKeyValue = ref('');
@@ -89,36 +96,24 @@ async function loadMcpInfo() {
 }
 
 async function fetchApiKeys() {
-  const res = await fetch('/api/api-keys', { credentials: 'include' });
-  if (res.ok) {
-    const data = await res.json();
-    apiKeys.value = data.api_keys;
-  }
+  apiKeys.value = await listApiKeys();
 }
 
 async function createApiKey() {
   if (!newKeyName.value) return;
   creatingApiKey.value = true;
   try {
-    const res = await fetch('/api/api-keys', {
-      method: 'POST',
-      credentials: 'include',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ name: newKeyName.value, scope: newKeyScope.value }),
-    });
-    if (res.ok) {
-      const data = await res.json();
-      newKeyValue.value = data.key;
-      newKeyName.value = '';
-      await fetchApiKeys();
-    }
+    const data = await apiCreateApiKey(newKeyName.value, newKeyScope.value);
+    newKeyValue.value = data.key;
+    newKeyName.value = '';
+    await fetchApiKeys();
   } finally {
     creatingApiKey.value = false;
   }
 }
 
 async function revokeApiKey(id: number) {
-  await fetch(`/api/api-keys/${id}`, { method: 'DELETE', credentials: 'include' });
+  await apiRevokeApiKey(id);
   revokeConfirmId.value = null;
   await fetchApiKeys();
 }
@@ -521,12 +516,8 @@ onMounted(async () => {
     } catch {
       // base URL not configured yet
     }
-    if (activeTab.value === "groups") loadGroupsPanel();
-    if (activeTab.value === "users") loadUsersPanel();
-    if (activeTab.value === "logs") loadLogsPanel();
   }
-  if (activeTab.value === "briefing") loadBriefingTab();
-  if (activeTab.value === "apikeys") { fetchApiKeys(); loadMcpInfo(); }
+  _loadTabContent(activeTab.value);
 });
 
 async function changeEmail() {