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📱 Local Storage Implementation

Transform your Summary Memory chat to remember conversations across browser sessions using localStorage. This route requires zero backend changes and gets you persistent memory in just 15 minutes.

Building on: This route enhances your existing Summary Memory implementation. Make sure you have Summary Memory working before starting here.


Transform your Summary Memory chat to include:

  • Auto-save conversations to browser storage after every message
  • Auto-restore chats when page loads, including summaries
  • Conversation sidebar with saved conversation list
  • Simple conversation management (new, load, clear)
  • Fixed input position - stays at bottom, doesn’t scroll away
// Perfect combination for learning and demos
const benefits = {
setup: '15 minutes, zero backend changes',
features: 'Smart summarization + persistent storage',
privacy: 'Data never leaves user device',
cost: 'Completely free'
}
// Understand the limitations
const limitations = {
devices: 'Single device/browser only',
storage: '5MB browser limit',
sharing: 'No multi-user support'
}

🛠️ Step 1: Add Simple Storage Functions

Section titled “🛠️ Step 1: Add Simple Storage Functions”

Add these functions to your Summary Memory StreamingChat.jsx component:

import { useState, useRef, useEffect } from 'react'
import { Send, Bot, User, Trash2, Plus, MessageSquare } from 'lucide-react'
// 🆕 LOCAL STORAGE: Simple storage functions
const STORAGE_KEY = 'ai-conversations'
const saveConversation = (conversationId, messages, summary, conversationType) => {
const conversations = getAllConversations()
const conversationData = {
id: conversationId,
messages: messages.filter(msg => !msg.isStreaming),
summary,
conversationType,
title: generateTitle(messages),
timestamp: new Date().toISOString(),
messageCount: messages.length
}
conversations[conversationId] = conversationData
try {
localStorage.setItem(STORAGE_KEY, JSON.stringify(conversations))
console.log('💾 Conversation saved to localStorage')
} catch (error) {
console.error('Failed to save:', error)
}
}
const getAllConversations = () => {
try {
const stored = localStorage.getItem(STORAGE_KEY)
return stored ? JSON.parse(stored) : {}
} catch (error) {
console.error('Failed to load conversations:', error)
return {}
}
}
const loadConversation = (conversationId) => {
const conversations = getAllConversations()
return conversations[conversationId] || null
}
const deleteConversation = (conversationId) => {
const conversations = getAllConversations()
delete conversations[conversationId]
try {
localStorage.setItem(STORAGE_KEY, JSON.stringify(conversations))
console.log('🗑️ Conversation deleted')
} catch (error) {
console.error('Failed to delete conversation:', error)
}
}
const generateTitle = (messages) => {
if (!messages || messages.length === 0) return 'New Conversation'
const firstUserMessage = messages.find(msg => msg.isUser)
if (firstUserMessage) {
return firstUserMessage.text.length > 30
? firstUserMessage.text.substring(0, 30) + '...'
: firstUserMessage.text
}
return 'New Conversation'
}
const generateId = () => {
return Date.now().toString() + Math.random().toString(36).substr(2, 9)
}

What these functions do:

  • saveConversation - Saves conversation data to localStorage
  • getAllConversations - Retrieves all stored conversations
  • loadConversation - Loads a specific conversation by ID
  • deleteConversation - Removes a conversation from storage
  • generateTitle - Creates title from first user message
  • generateId - Creates unique conversation IDs

Add conversation management state to your Summary Memory component:

function StreamingChat() {
const [messages, setMessages] = useState([])
const [input, setInput] = useState('')
const [isStreaming, setIsStreaming] = useState(false)
const abortControllerRef = useRef(null)
// Summary Memory state (keep existing)
const [summary, setSummary] = useState(null)
const [recentWindowSize, setRecentWindowSize] = useState(15)
const [summaryThreshold, setSummaryThreshold] = useState(25)
const [isCreatingSummary, setIsCreatingSummary] = useState(false)
const [conversationType, setConversationType] = useState('general')
// 🆕 LOCAL STORAGE: Add conversation management state
const [currentConversationId, setCurrentConversationId] = useState(null)
const [conversations, setConversations] = useState({})
const [showSidebar, setShowSidebar] = useState(true)

What the new state does:

  • currentConversationId - Tracks which conversation is currently active
  • conversations - Stores all conversation data for the sidebar
  • showSidebar - Controls sidebar visibility (collapsible)

📋 Step 3: Add Conversation Management Functions

Section titled “📋 Step 3: Add Conversation Management Functions”

Add these functions after your existing Summary Memory functions:

// Keep ALL your existing Summary Memory functions (buildConversationHistory, detectConversationType, etc.)
// 🆕 LOCAL STORAGE: Add conversation management functions
const startNewConversation = () => {
setCurrentConversationId(generateId())
setMessages([])
setSummary(null)
setConversationType('general')
}
const loadConversationById = (conversationId) => {
const conversation = loadConversation(conversationId)
if (conversation) {
setCurrentConversationId(conversationId)
setMessages(conversation.messages || [])
setSummary(conversation.summary || null)
setConversationType(conversation.conversationType || 'general')
console.log(`✅ Loaded conversation: ${conversation.title}`)
}
}
const deleteConversationById = (conversationId) => {
deleteConversation(conversationId)
setConversations(getAllConversations())
if (currentConversationId === conversationId) {
startNewConversation()
}
}

What these functions do:

  • startNewConversation - Creates a new conversation and resets state
  • loadConversationById - Loads a conversation and restores its state
  • deleteConversationById - Deletes a conversation and handles cleanup

Add these useEffect hooks after your state declarations:

// 🆕 LOCAL STORAGE: Load conversations on startup
useEffect(() => {
const allConversations = getAllConversations()
setConversations(allConversations)
// Load the most recent conversation if exists
const conversationIds = Object.keys(allConversations)
if (conversationIds.length > 0) {
const mostRecent = conversationIds
.map(id => allConversations[id])
.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp))[0]
if (mostRecent) {
loadConversationById(mostRecent.id)
}
}
}, [])
// 🆕 LOCAL STORAGE: Auto-save when conversation changes
useEffect(() => {
if (currentConversationId && messages.length > 0) {
saveConversation(currentConversationId, messages, summary, conversationType)
// Refresh conversation list for sidebar
setConversations(getAllConversations())
}
}, [messages, summary, conversationType, currentConversationId])

What the auto-save logic does:

  • First useEffect - Loads saved conversations when app starts
  • Second useEffect - Automatically saves conversations when they change
  • Triggers on - Any change to messages, summary, conversation type, or ID

Problem: Original layout had input scrolling with messages, making it hard to reach when conversations got long.

Solution: Create a fixed layout where only messages scroll, input stays at bottom.

Replace your return statement with this enhanced layout structure:

return (
{/* 🔧 LAYOUT FIX 1: Use h-screen instead of min-h-screen for fixed height */}
<div className="h-screen bg-gray-100 flex">
{/* Sidebar (unchanged structure) */}
{showSidebar && (
<div className="w-80 bg-white border-r border-gray-200 flex flex-col">
{/* Sidebar content stays the same */}
</div>
)}
{/* 🔧 LAYOUT FIX 2: Add min-h-0 to main chat area for proper flex behavior */}
<div className="flex-1 flex flex-col min-h-0">
{/* 🔧 LAYOUT FIX 3: Make header fixed with flex-shrink-0 */}
<div className="bg-blue-500 text-white p-4 flex-shrink-0">
{/* Header content */}
</div>
{/* 🔧 LAYOUT FIX 4: Make memory dashboard fixed with flex-shrink-0 */}
<div className="bg-gray-50 px-4 py-3 border-b flex-shrink-0">
{/* Memory status content */}
</div>
{/* 🔧 LAYOUT FIX 5: Make summary display fixed when present */}
{summary && (
<div className="bg-blue-50 border-l-4 border-blue-400 p-3 mx-4 mt-2 rounded flex-shrink-0">
{/* Summary content */}
</div>
)}
{/* 🔧 LAYOUT FIX 6: Make ONLY messages area scrollable with flex-1 and min-h-0 */}
<div className="flex-1 overflow-y-auto p-4 space-y-4 min-h-0">
{/* Messages content */}
{/* Add spacer at bottom for breathing room */}
<div className="h-4"></div>
</div>
{/* 🔧 LAYOUT FIX 7: Fix input at bottom with flex-shrink-0 and bg-white */}
<div className="border-t bg-white p-4 flex-shrink-0">
{/* Input content */}
</div>
</div>
</div>
)

Key Layout Changes Explained:

  1. h-screen - Uses full viewport height instead of min-height
  2. min-h-0 - Allows flex items to shrink below content size
  3. flex-shrink-0 - Prevents header, dashboard, and input from shrinking
  4. flex-1 overflow-y-auto - Makes only messages area scrollable and expandable
  5. bg-white on input - Distinguishes input area from messages

Here’s the complete final code with all changes integrated:

import { useState, useRef, useEffect } from 'react'
import { Send, Bot, User, Trash2, Plus, MessageSquare } from 'lucide-react'
// 🆕 LOCAL STORAGE: Simple storage functions
const STORAGE_KEY = 'ai-conversations'
const saveConversation = (conversationId, messages, summary, conversationType) => {
const conversations = getAllConversations()
const conversationData = {
id: conversationId,
messages: messages.filter(msg => !msg.isStreaming),
summary,
conversationType,
title: generateTitle(messages),
timestamp: new Date().toISOString(),
messageCount: messages.length
}
conversations[conversationId] = conversationData
try {
localStorage.setItem(STORAGE_KEY, JSON.stringify(conversations))
console.log('💾 Conversation saved to localStorage')
} catch (error) {
console.error('Failed to save:', error)
}
}
const getAllConversations = () => {
try {
const stored = localStorage.getItem(STORAGE_KEY)
return stored ? JSON.parse(stored) : {}
} catch (error) {
console.error('Failed to load conversations:', error)
return {}
}
}
const loadConversation = (conversationId) => {
const conversations = getAllConversations()
return conversations[conversationId] || null
}
const deleteConversation = (conversationId) => {
const conversations = getAllConversations()
delete conversations[conversationId]
try {
localStorage.setItem(STORAGE_KEY, JSON.stringify(conversations))
console.log('🗑️ Conversation deleted')
} catch (error) {
console.error('Failed to delete conversation:', error)
}
}
const generateTitle = (messages) => {
if (!messages || messages.length === 0) return 'New Conversation'
const firstUserMessage = messages.find(msg => msg.isUser)
if (firstUserMessage) {
return firstUserMessage.text.length > 30
? firstUserMessage.text.substring(0, 30) + '...'
: firstUserMessage.text
}
return 'New Conversation'
}
const generateId = () => {
return Date.now().toString() + Math.random().toString(36).substr(2, 9)
}
function StreamingChat() {
const [messages, setMessages] = useState([])
const [input, setInput] = useState('')
const [isStreaming, setIsStreaming] = useState(false)
const abortControllerRef = useRef(null)
// Summary Memory state (keep existing)
const [summary, setSummary] = useState(null)
const [recentWindowSize, setRecentWindowSize] = useState(15)
const [summaryThreshold, setSummaryThreshold] = useState(25)
const [isCreatingSummary, setIsCreatingSummary] = useState(false)
const [conversationType, setConversationType] = useState('general')
// 🆕 LOCAL STORAGE: Conversation management
const [currentConversationId, setCurrentConversationId] = useState(null)
const [conversations, setConversations] = useState({})
const [showSidebar, setShowSidebar] = useState(true)
// Keep ALL your existing Summary Memory functions
const buildConversationHistory = (messages) => {
return messages
.filter(msg => !msg.isStreaming)
.map(msg => ({
role: msg.isUser ? "user" : "assistant",
content: msg.text
}));
};
const detectConversationType = (messages) => {
const recentText = messages.slice(-10).map(m => m.text).join(' ').toLowerCase();
if (recentText.includes('function') || recentText.includes('code') || recentText.includes('api')) {
return 'technical';
} else if (recentText.includes('create') || recentText.includes('idea') || recentText.includes('design')) {
return 'creative';
} else if (recentText.includes('problem') || recentText.includes('error') || recentText.includes('help')) {
return 'support';
}
return 'general';
};
const createSummary = async (messagesToSummarize) => {
if (isCreatingSummary) return;
try {
setIsCreatingSummary(true);
const detectedType = detectConversationType(messages);
const response = await fetch('http://localhost:8000/api/summarize', {
method: 'POST',
headers: { 'Content-Type': 'application/json' },
body: JSON.stringify({
messages: messagesToSummarize,
conversationType: detectedType
}),
});
const data = await response.json();
if (data.success) {
setSummary(data.summary);
setConversationType(data.conversationType);
console.log(`📋 Summary created: ${data.messagesCount} messages summarized as ${data.conversationType}`);
}
} catch (error) {
console.error("Failed to create summary:", error);
} finally {
setIsCreatingSummary(false);
}
};
const shouldCreateSummary = (conversationHistory) => {
return conversationHistory.length >= summaryThreshold && !summary;
};
const shouldUpdateSummary = (conversationHistory) => {
return conversationHistory.length >= summaryThreshold * 2 && summary;
};
const isGoodTimeToSummarize = (conversationHistory) => {
const recentMessages = conversationHistory.slice(-3);
const hasCodeDiscussion = recentMessages.some(msg =>
msg.content.includes('```') || msg.content.includes('function'));
const hasFollowUp = recentMessages.some(msg =>
msg.content.toLowerCase().includes('can you explain') ||
msg.content.toLowerCase().includes('tell me more') ||
msg.content.toLowerCase().includes('what about'));
return !hasCodeDiscussion && !hasFollowUp;
};
const getMemoryStats = () => {
const totalMessages = messages.filter(msg => !msg.isStreaming).length
const recentMessages = Math.min(totalMessages, recentWindowSize)
const summarizedMessages = Math.max(0, totalMessages - recentWindowSize)
return { totalMessages, recentMessages, summarizedMessages }
};
// 🆕 LOCAL STORAGE: Load conversations on startup
useEffect(() => {
const allConversations = getAllConversations()
setConversations(allConversations)
// Load the most recent conversation if exists
const conversationIds = Object.keys(allConversations)
if (conversationIds.length > 0) {
const mostRecent = conversationIds
.map(id => allConversations[id])
.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp))[0]
if (mostRecent) {
loadConversationById(mostRecent.id)
}
}
}, [])
// 🆕 LOCAL STORAGE: Auto-save when conversation changes
useEffect(() => {
if (currentConversationId && messages.length > 0) {
saveConversation(currentConversationId, messages, summary, conversationType)
// Refresh conversation list
setConversations(getAllConversations())
}
}, [messages, summary, conversationType, currentConversationId])
// 🆕 LOCAL STORAGE: Conversation management functions
const startNewConversation = () => {
setCurrentConversationId(generateId())
setMessages([])
setSummary(null)
setConversationType('general')
}
const loadConversationById = (conversationId) => {
const conversation = loadConversation(conversationId)
if (conversation) {
setCurrentConversationId(conversationId)
setMessages(conversation.messages || [])
setSummary(conversation.summary || null)
setConversationType(conversation.conversationType || 'general')
console.log(`✅ Loaded conversation: ${conversation.title}`)
}
}
const deleteConversationById = (conversationId) => {
deleteConversation(conversationId)
setConversations(getAllConversations())
if (currentConversationId === conversationId) {
startNewConversation()
}
}
// Keep your existing sendMessage function with Summary Memory logic
const sendMessage = async () => {
if (!input.trim() || isStreaming) return
// Create new conversation if none exists
if (!currentConversationId) {
setCurrentConversationId(generateId())
}
const userMessage = { text: input, isUser: true, id: Date.now() }
setMessages(prev => [...prev, userMessage])
const currentInput = input
setInput('')
setIsStreaming(true)
const aiMessageId = Date.now() + 1
const aiMessage = { text: '', isUser: false, id: aiMessageId, isStreaming: true }
setMessages(prev => [...prev, aiMessage])
try {
const conversationHistory = buildConversationHistory(messages)
// Summary Memory logic (keep exactly as is)
if (shouldCreateSummary(conversationHistory) && isGoodTimeToSummarize(conversationHistory)) {
const messagesToSummarize = conversationHistory.slice(0, -recentWindowSize);
createSummary(messagesToSummarize);
} else if (shouldUpdateSummary(conversationHistory) && isGoodTimeToSummarize(conversationHistory)) {
const messagesToSummarize = conversationHistory.slice(0, -recentWindowSize);
createSummary(messagesToSummarize);
}
abortControllerRef.current = new AbortController()
const response = await fetch('http://localhost:8000/api/chat/stream', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({
message: currentInput,
conversationHistory: conversationHistory,
summary: summary,
recentWindowSize: recentWindowSize
}),
signal: abortControllerRef.current.signal,
})
if (!response.ok) {
throw new Error('Failed to get response')
}
const reader = response.body.getReader()
const decoder = new TextDecoder()
while (true) {
const { done, value } = await reader.read()
if (done) break
const chunk = decoder.decode(value, { stream: true })
setMessages(prev =>
prev.map(msg =>
msg.id === aiMessageId
? { ...msg, text: msg.text + chunk }
: msg
)
)
}
setMessages(prev =>
prev.map(msg =>
msg.id === aiMessageId
? { ...msg, isStreaming: false }
: msg
)
)
} catch (error) {
if (error.name === 'AbortError') {
console.log('Request was cancelled')
} else {
console.error('Streaming error:', error)
setMessages(prev =>
prev.map(msg =>
msg.id === aiMessageId
? { ...msg, text: 'Sorry, something went wrong.', isStreaming: false }
: msg
)
)
}
} finally {
setIsStreaming(false)
abortControllerRef.current = null
}
}
const handleKeyPress = (e) => {
if (e.key === 'Enter' && !e.shiftKey && !isStreaming) {
e.preventDefault()
sendMessage()
}
}
const stopStreaming = () => {
if (abortControllerRef.current) {
abortControllerRef.current.abort()
}
}
return (
<div className="h-screen bg-gray-100 flex">
{/* 🆕 LOCAL STORAGE: Conversation Sidebar */}
{showSidebar && (
<div className="w-80 bg-white border-r border-gray-200 flex flex-col">
{/* Sidebar Header */}
<div className="p-4 border-b border-gray-200">
<div className="flex items-center justify-between mb-3">
<h2 className="text-lg font-semibold text-gray-800">Conversations</h2>
<button
onClick={() => setShowSidebar(false)}
className="text-gray-400 hover:text-gray-600"
>
</button>
</div>
<button
onClick={startNewConversation}
className="w-full bg-blue-500 text-white px-4 py-2 rounded-lg hover:bg-blue-600 flex items-center justify-center space-x-2"
>
<Plus className="w-4 h-4" />
<span>New Chat</span>
</button>
</div>
{/* Conversation List */}
<div className="flex-1 overflow-y-auto">
{Object.values(conversations)
.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp))
.map(conversation => (
<div
key={conversation.id}
className={`p-3 border-b border-gray-100 cursor-pointer hover:bg-gray-50 ${
currentConversationId === conversation.id ? 'bg-blue-50 border-l-4 border-l-blue-500' : ''
}`}
onClick={() => loadConversationById(conversation.id)}
>
<div className="flex items-start justify-between">
<div className="flex-1 min-w-0">
<h3 className="text-sm font-medium text-gray-800 truncate">
{conversation.title}
</h3>
<div className="flex items-center space-x-2 mt-1">
<span className="text-xs text-gray-500">
{conversation.messageCount} messages
</span>
{conversation.summary && (
<span className="text-xs bg-green-100 text-green-600 px-2 py-0.5 rounded">
📋 Summary
</span>
)}
<span className="text-xs bg-blue-100 text-blue-600 px-2 py-0.5 rounded">
{conversation.conversationType}
</span>
</div>
<p className="text-xs text-gray-400 mt-1">
{new Date(conversation.timestamp).toLocaleDateString()}
</p>
</div>
<button
onClick={(e) => {
e.stopPropagation()
deleteConversationById(conversation.id)
}}
className="text-gray-400 hover:text-red-500 ml-2"
>
<Trash2 className="w-4 h-4" />
</button>
</div>
</div>
))
}
{Object.keys(conversations).length === 0 && (
<div className="p-6 text-center text-gray-500">
<MessageSquare className="w-8 h-8 mx-auto mb-2 text-gray-300" />
<p className="text-sm">No conversations yet</p>
<p className="text-xs">Start a new chat to begin</p>
</div>
)}
</div>
</div>
)}
{/* Main Chat Area */}
<div className="flex-1 flex flex-col min-h-0">
{/* Chat Header */}
<div className="bg-blue-500 text-white p-4 flex-shrink-0">
<div className="flex justify-between items-start">
<div className="flex items-center space-x-3">
{!showSidebar && (
<button
onClick={() => setShowSidebar(true)}
className="text-blue-100 hover:text-white"
>
<MessageSquare className="w-5 h-5" />
</button>
)}
<div>
<h1 className="text-xl font-bold">Summary Memory + Local Storage</h1>
<p className="text-blue-100 text-sm">
Smart conversation memory with persistent storage
</p>
</div>
</div>
<div className="text-right space-y-2">
<div>
<label className="block text-xs text-blue-100">Recent: {recentWindowSize}</label>
<input
type="range" min="5" max="30" value={recentWindowSize}
onChange={(e) => setRecentWindowSize(parseInt(e.target.value))}
className="w-20" disabled={isStreaming}
/>
</div>
<div>
<label className="block text-xs text-blue-100">Summary at: {summaryThreshold}</label>
<input
type="range" min="15" max="50" value={summaryThreshold}
onChange={(e) => setSummaryThreshold(parseInt(e.target.value))}
className="w-20" disabled={isStreaming}
/>
</div>
</div>
</div>
</div>
{/* Memory Status Dashboard */}
<div className="bg-gray-50 px-4 py-3 border-b flex-shrink-0">
{(() => {
const { totalMessages, recentMessages, summarizedMessages } = getMemoryStats();
return (
<div className="space-y-2">
<div className="flex justify-between items-center text-sm">
<div className="flex space-x-4 text-gray-600">
<span>📊 Total: {totalMessages}</span>
<span>🔥 Recent: {recentMessages}</span>
{summarizedMessages > 0 && (
<span>📝 Summarized: {summarizedMessages}</span>
)}
<span className="text-blue-600">🧠 {conversationType}</span>
</div>
<div className="flex items-center space-x-2 text-xs">
{summary && (
<span className="text-green-600">✅ Summary Active</span>
)}
{isCreatingSummary && (
<span className="text-blue-600">🔄 Creating Summary...</span>
)}
<span className="text-purple-600">
💾 {Object.keys(conversations).length} saved
</span>
</div>
</div>
<div className="w-full bg-gray-200 rounded-full h-2">
<div
className="bg-blue-500 h-2 rounded-full transition-all duration-300"
style={{
width: `${Math.min(100, (totalMessages / 50) * 100)}%`
}}
/>
</div>
</div>
);
})()}
</div>
{/* Active Summary Display */}
{summary && (
<div className="bg-blue-50 border-l-4 border-blue-400 p-3 mx-4 mt-2 rounded flex-shrink-0">
<div className="flex items-start">
<span className="text-blue-600 mr-2">📋</span>
<div className="flex-1">
<p className="text-xs font-medium text-blue-800 mb-1">
Active Summary ({conversationType}) • Auto-saved
</p>
<p className="text-xs text-blue-700 leading-relaxed">
{summary}
</p>
</div>
</div>
</div>
)}
{/* Messages - Scrollable Area */}
<div className="flex-1 overflow-y-auto p-4 space-y-4 min-h-0">
{messages.length === 0 && (
<div className="text-center text-gray-500 mt-20">
<Bot className="w-12 h-12 mx-auto mb-4 text-gray-400" />
<p>Send a message to see Summary Memory + Local Storage in action!</p>
{Object.keys(conversations).length > 0 && (
<p className="text-sm mt-2 text-blue-600">
💾 Select a conversation from the sidebar or start a new one
</p>
)}
</div>
)}
{messages.map((message) => (
<div
key={message.id}
className={`flex items-start space-x-3 ${
message.isUser ? 'justify-end' : 'justify-start'
}`}
>
{!message.isUser && (
<div className="bg-blue-500 p-2 rounded-full">
<Bot className="w-4 h-4 text-white" />
</div>
)}
<div
className={`max-w-xs lg:max-w-md px-4 py-2 rounded-lg ${
message.isUser
? 'bg-blue-500 text-white'
: 'bg-gray-200 text-gray-800'
}`}
>
{message.text}
{message.isStreaming && (
<span className="inline-block w-2 h-4 bg-blue-500 ml-1 animate-pulse" />
)}
</div>
{message.isUser && (
<div className="bg-gray-500 p-2 rounded-full">
<User className="w-4 h-4 text-white" />
</div>
)}
</div>
))}
{/* Spacer to ensure last message has some breathing room */}
<div className="h-4"></div>
</div>
{/* Fixed Input Area */}
<div className="border-t bg-white p-4 flex-shrink-0">
<div className="flex space-x-2">
<input
type="text"
value={input}
onChange={(e) => setInput(e.target.value)}
onKeyPress={handleKeyPress}
placeholder="Type your message..."
className="flex-1 border border-gray-300 rounded-lg px-4 py-2 focus:outline-none focus:ring-2 focus:ring-blue-500"
disabled={isStreaming}
/>
{isStreaming ? (
<button
onClick={stopStreaming}
className="bg-red-500 hover:bg-red-600 text-white px-4 py-2 rounded-lg transition-colors"
>
Stop
</button>
) : (
<button
onClick={sendMessage}
disabled={!input.trim()}
className="bg-blue-500 hover:bg-blue-600 disabled:bg-gray-300 text-white p-2 rounded-lg transition-colors"
>
<Send className="w-5 h-5" />
</button>
)}
</div>
</div>
</div>
</div>
)
}
export default StreamingChat

  1. Start your Summary Memory backend and frontend
  2. Test conversation persistence:
Phase 1: Create and save conversations
You: "Hi! My name is Alex and I'm a software engineer"
AI: "Nice to meet you, Alex! Great to know you're in software engineering."
• Continue conversation until you have 10+ messages
• Notice it auto-saves and appears in sidebar
• Observe input stays at bottom even with long conversations
Phase 2: Test multiple conversations
• Click "New Chat" button
• Start a different conversation about cooking
• Watch both conversations appear in sidebar
• Notice input remains fixed at bottom
Phase 3: Test persistence and fixed layout
• Refresh the page
• All conversations should load in sidebar
• Click any conversation to load it perfectly
• Scroll through long conversations - input stays put!
• Summaries and settings should restore
Phase 4: Test layout at different conversation lengths
• Create a conversation with 50+ messages
• Scroll through the conversation
• Input field should always be visible and accessible
• Only the message area should scroll

  • Before: Input field scrolled down with messages, hard to reach in long conversations
  • After: Input field stays fixed at bottom, only messages scroll
ComponentChangePurpose
Main Containermin-h-screenh-screenFixed viewport height
Chat AreaAdded min-h-0Allows proper flex shrinking
HeaderAdded flex-shrink-0Prevents header from shrinking
Memory DashboardAdded flex-shrink-0Keeps status bar fixed
Summary DisplayAdded flex-shrink-0Prevents summary from shrinking
Messages Areaflex-1 overflow-y-auto min-h-0Only this area scrolls
Input Areaflex-shrink-0 bg-whiteFixed at bottom with distinction
  • Professional chat app feel - Input always accessible
  • Better user experience - No hunting for input field
  • Mobile-friendly - Works great on all screen sizes
  • All features preserved - Summary Memory + Local Storage work perfectly
  • Visual hierarchy - Clear distinction between areas

// What gets saved to localStorage:
const conversations = {
"conv_123": {
id: "conv_123",
title: "Hi! My name is Alex and I'm a...",
messages: [...], // All messages
summary: "User Alex is a software engineer...",
conversationType: "technical",
messageCount: 25,
timestamp: "2024-01-15T10:30:00Z"
}
}
/* Fixed Layout Hierarchy */
.main-container { /* h-screen */
.sidebar { } /* flex column */
.chat-area { /* flex-1 flex flex-col min-h-0 */
.header { } /* flex-shrink-0 */
.memory-dashboard { } /* flex-shrink-0 */
.summary-display { } /* flex-shrink-0 */
.messages-area { } /* flex-1 overflow-y-auto min-h-0 ← ONLY SCROLLABLE */
.input-area { } /* flex-shrink-0 bg-white ← ALWAYS VISIBLE */
}
}

Your Summary Memory + Local Storage system now provides:

Smart Memory Management (from Summary Memory)

Section titled “Smart Memory Management (from Summary Memory)”
  • Intelligent summarization - Automatic conversation compression
  • Context retention - Never loses important conversation details
  • Cost optimization - Up to 70% token savings in long conversations
  • Background processing - Chat responses stay instant

Persistent Storage (Local Storage features)

Section titled “Persistent Storage (Local Storage features)”
  • Auto-save conversations - Every message automatically saved
  • Conversation sidebar - Visual list of all saved conversations
  • Complete restoration - Messages, summaries, and settings preserved
  • Simple management - Create new, load existing, delete old conversations
  • Fixed input position - Always accessible at bottom
  • Smart scrolling - Only messages area scrolls
  • Modern chat UX - Behaves like professional chat apps
  • Mobile responsive - Works great on all screen sizes
  • Visual clarity - Clear separation between functional areas

This combines the best of all worlds: Summary Memory’s intelligent conversation management + Local Storage’s simple persistence + Professional chat app layout! Perfect for learning, demos, and applications where users want a polished experience with complete data control! 💾🧠✨

Ready for production? When you’re ready to scale to multi-user applications, the Database Storage route will build on these same principles with server-side storage and user accounts, keeping the same great layout!