♻️ refactor: optimize state management, switch to @tanstack/vue-virtual, and improve performance

- Centralize `useAgents` and `useModels` state within the Nuxt app context to prevent data leaks and improve initialization.
- Migrate virtualization from `vue-virtual-scroller` to `@tanstack/vue-virtual` with new `RowVirtualizerFixed` and `RowVirtualizerDynamic` components.
- Upgrade Nuxt to v4.3.1 and remove `@vue-macros/nuxt`.
- Replace `big.js` with an optimized custom `lshDecimal` string manipulation logic for pricing calculations in the provider API.
- Implement automatic focus redirection in `ChatInput` to capture standard keyboard input.
- Refactor Sidenav and Settings components to utilize virtualization for long lists (topics, agents, models).
- Enhance theme colors and mobile experience. More work to come on both of these.

app/pages/agent/[id]/index.vue

@@ -8,16 +8,10 @@ const inputValue = ref('');
 const pendingMessage = ref<Message | null>(null);
 
 const { createTopic, sendMessage, autoRename } = useChat(route.params.id as string);
-const { getAgent, unsubscribe: unsubscribeAgents } = await useAgents();
-const { providers, unsubscribe: unsubscribeModels } = await useModels();
+const { getAgent } = useAgents();
+const { providers } = useModels();
 
-const agent = computed(() => {
-    if (route.params.id === null || typeof route.params.id !== 'string') {
-        throw new Error('Invalid agent ID');
-    }
-
-    return getAgent(route.params.id)!;
-});
+const agent = getAgent(route.params.id as string);
 
 if (!agent.value) navigateTo('/');
 
@@ -85,11 +79,6 @@ const handleSubmit = async (message: string, model: ModelWithProvider | null) =>
         }
     });
 };
-
-onUnmounted(() => {
-    unsubscribeAgents?.();
-    unsubscribeModels?.();
-});
 </script>
 
 

app/pages/agent/[id]/profile.vue

@@ -1,18 +1,12 @@
 <script setup lang="ts">
-const { getAgent, unsubscribe: unsubscribeAgents } = await useAgents();
+const { getAgent } = useAgents();
 const triplit = useTriplitClient();
 
 const route = useRoute();
 
-const agent = computed(() => {
-    if (route.params.id === null || typeof route.params.id !== 'string') {
-        throw new Error('Invalid agent ID');
-    }
+const agent = getAgent(route.params.id as string);
 
-    return getAgent(route.params.id)!;
-});
-
-// if (agent.value === undefined) navigateTo('/');
+if (agent.value === undefined) navigateTo('/');
 
 const handleInput = async (e: Event) => {
     const target = e.target as HTMLInputElement;
@@ -20,7 +14,7 @@ const handleInput = async (e: Event) => {
         return;
     }
 
-    await triplit.update('agents', agent.value.id, { name: target.value });
+    await triplit.update('agents', agent.value!.id, { name: target.value });
 };
 
 const changeSystemPrompt = async (e: Event) => {
@@ -31,14 +25,10 @@ const changeSystemPrompt = async (e: Event) => {
         value = undefined;
     }
 
-    await triplit.update('agents', agent.value.id, {
+    await triplit.update('agents', agent.value!.id, {
         systemPrompt: target.value,
     });
 };
-
-onUnmounted(() => {
-    unsubscribeAgents?.();
-});
 </script>
 
 <template>

app/pages/agent/[id]/topic/[topicId].vue

@@ -10,16 +10,10 @@ const chatPaneWrapper = ref<HTMLElement | null>(null);
 const inputValue = ref('');
 const route = useRoute();
 const { sendMessage, regenerateMessage } = useChat(route.params.id as string);
-const { getAgent, unsubscribe: unsubscribeAgents } = await useAgents();
-const { providers, allModels, unsubscribe: unsubscribeModels } = await useModels();
+const { getAgent } = useAgents();
+const { providers, allModels } = useModels();
 
-const agent = computed(() => {
-    if (route.params.id === null || typeof route.params.id !== 'string') {
-        throw new Error('Invalid agent ID');
-    }
-
-    return getAgent(route.params.id)!;
-});
+const agent = getAgent(route.params.id as string);
 
 const topicQuery = computed(() =>
     triplit
@@ -273,8 +267,6 @@ onUnmounted(() => {
     unsubscribeMessages?.();
     unsubscribeParts?.();
     unsubscribeGenerations?.();
-    unsubscribeAgents?.();
-    unsubscribeModels?.();
 });
 </script>
 

app/pages/index.vue

@@ -1,12 +1,11 @@
 <script setup lang="ts">
-import type schema from '#triplit/schema';
-import type { Entity } from '@triplit/client';
 import { assert } from '~~/utils/assert';
+import type { Agent } from '~/composables/useAgents';
 
 const triplit = useTriplitClient();
 
-const { agents, unsubscribe: unsubscribeAgents, createAgent } = await useAgents();
-const { providers, unsubscribe: unsubscribeModels, getFirstAvailableModel, allModels } = await useModels();
+const { agents, createAgent } = useAgents();
+const { providers, getFirstAvailableModel, allModels } = useModels();
 
 const taglines = {
     morning: [
@@ -74,12 +73,12 @@ const typeWriter = (time: 'morning' | 'afternoon' | 'evening') => {
 };
 
 const agent = computed(() => {
-    return agents.value?.[0];
+    return agents.value?.[0] ?? null;
 });
 
 const handleChatSubmit = async (message: string, model: ModelWithProvider | null) => {
     console.log('Message submitted:', message, agents);
-    let agent: Entity<typeof schema, 'agents'> | null = agents.value?.[0] ?? null;
+    let agent: Agent | null = agents.value?.[0] ?? null;
     if (!agent) {
         const triplit = useTriplitClient();
         assert('flush' in triplit);
@@ -162,8 +161,6 @@ onUnmounted(() => {
     if (typeWriterInterval !== null) {
         clearTimeout(typeWriterInterval);
     }
-    unsubscribeAgents?.();
-    unsubscribeModels?.();
 })
 </script>
 

app/pages/test.vue

@@ -0,0 +1,3 @@
+<template>
+
+</template>