fix(ui): deduplicate store fetches with null-guards and mutex (#25943)

src/lib/components/admin/Analytics/AnalyticsModelModal.svelte

@@ -150,7 +150,8 @@
 		selectedTab = 'overview';
 		chatList = [];
 		allChatsLoaded = false;
-		selectRange(selectedRange);
+		selectedRange = '30d';
+		loadOverview(30);
 	}
 </script>
 

src/lib/components/admin/Evaluations/LeaderboardModal.svelte

@@ -51,7 +51,8 @@
 
 	// Load history when model changes and modal is shown
 	$: if (show && model?.id) {
-		selectRange(selectedRange);
+		selectedRange = '30d';
+		loadHistory(30);
 	}
 
 	// Use top_tags from backend response (already computed)

src/lib/components/channel/MessageInput/MentionList.svelte

@@ -117,10 +117,6 @@
 					.map((c) => ({ type: 'channel', id: c.id, label: c.name, data: c }))
 			];
 		} else {
-			if (userSuggestions) {
-				getUserList();
-			}
-
 			if (modelSuggestions) {
 				_models = [
 					...$models

src/lib/components/chat/Chat.svelte

@@ -113,7 +113,6 @@
 	import Tooltip from '../common/Tooltip.svelte';
 	import Sidebar from '../icons/Sidebar.svelte';
 	import Image from '../common/Image.svelte';
-	import { getBanners } from '$lib/apis/configs';
 
 	export let chatIdProp = '';
 
@@ -330,7 +329,12 @@
 		);
 	};
 
+	let settingDefaults = false;
 	const setDefaults = async () => {
+		if (settingDefaults) return;
+		settingDefaults = true;
+
+		try {
 			if (!$tools) {
 				tools.set(await getTools(localStorage.token));
 			}
@@ -350,7 +354,9 @@
 				if (model?.info?.meta?.toolIds) {
 					const defaultIds = [
 						...new Set(
-						[...(model?.info?.meta?.toolIds ?? [])].filter((id) => $tools.find((t) => t.id === id))
+							[...(model?.info?.meta?.toolIds ?? [])].filter((id) =>
+								$tools.find((t) => t.id === id)
+							)
 						)
 					];
 
@@ -432,6 +438,9 @@
 					}
 				}
 			}
+		} finally {
+			settingDefaults = false;
+		}
 	};
 
 	const showMessage = async (message, scroll = true) => {
@@ -796,13 +805,6 @@
 			if (p.url.pathname === '/') {
 				await tick();
 				initNewChat();
-
-				// Re-fetch banners on navigation to homepage so newly configured banners appear
-				try {
-					banners.set(await getBanners(localStorage.token).catch(() => []));
-				} catch (e) {
-					console.error('Failed to refresh banners:', e);
-				}
 			}
 
 			stopAudio();

src/lib/components/chat/MessageInput.svelte

@@ -58,8 +58,6 @@
 	import { deleteFileById } from '$lib/apis/files';
 	import { getChatById } from '$lib/apis/chats';
 	import { getSessionUser } from '$lib/apis/auths';
-	import { getTools } from '$lib/apis/tools';
-	import { getSkills } from '$lib/apis/skills';
 
 	import { WEBUI_BASE_URL, WEBUI_API_BASE_URL, PASTED_TEXT_CHARACTER_LIMIT } from '$lib/constants';
 	import { getOAuthClientAuthorizationUrl } from '$lib/apis/configs';
@@ -1106,9 +1104,6 @@
 				dropzoneElement.addEventListener('drop', onDrop, true);
 				dropzoneElement.addEventListener('dragleave', onDragLeave);
 			}
-
-			tools.set(await getTools(localStorage.token));
-			skills.set(await getSkills(localStorage.token));
 		};
 		initialize();
 

src/lib/components/workspace/Models/ModelEditor.svelte

@@ -248,9 +248,13 @@
 	};
 
 	onMount(async () => {
+		if (!$tools) {
 			await tools.set(await getTools(localStorage.token));
+		}
 		skillsList = (await getSkills(localStorage.token).catch(() => null)) ?? [];
+		if (!$functions) {
 			await functions.set(await getFunctions(localStorage.token));
+		}
 
 		// Fetch admin-configured default model metadata so the editor
 		// reflects the actual defaults rather than hardcoded values