v2.0.0: BooCoder frontend — chat pane + diff pane + session picker

Phase 3 of v2.0. React + Vite SPA at apps/coder/web/ served by
the coder Fastify server via @fastify/static with SPA fallback.

Chat pane: message list via WS streaming (useSessionStream hook),
input bar, POST /api/sessions/:id/messages on submit, markdown
rendering via react-markdown + remark-gfm, inline tool-call display.

Diff pane: fetches GET /api/sessions/:id/pending, shows pending
changes with file path + operation badge (create/edit/delete),
before/after diff for edits, Approve/Reject per change and
Approve All/Reject All buttons.

Layout: fixed two-pane split (chat 60%, diff 40%). Dark theme
(bg-zinc-900). Desktop-first for v2.0.0.

Session picker (Home page): lists projects and sessions from the
shared DB. No CRUD — use BooChat's UI for that.

Dockerfile updated: builds web app in builder stage, copies dist
to runtime. index.ts registers fastifyStatic + SPA fallback route.

Tailwind v4, React 18, TypeScript strict. ~20 new files, ~370KB
built output. Functional developer tool UI, not polished consumer
product — Phase 7 (v2.0.3) handles polish.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
2026-05-25 03:04:52 +00:00
parent d2108b2f8d
commit 78455b7efc
26 changed files with 1574 additions and 0 deletions

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import { useState, useRef, useEffect } from 'react';
import { Send, Square } from 'lucide-react';
import type { Message } from '@/api/types';
import { api } from '@/api/client';
import { MessageBubble } from './MessageBubble';
interface Props {
sessionId: string;
chatId: string;
messages: Message[];
isStreaming: boolean;
connected: boolean;
}
export function ChatPane({ sessionId, chatId, messages, isStreaming, connected }: Props) {
const [input, setInput] = useState('');
const [sending, setSending] = useState(false);
const messagesEndRef = useRef<HTMLDivElement>(null);
const textareaRef = useRef<HTMLTextAreaElement>(null);
// Auto-scroll to bottom when messages change
useEffect(() => {
messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
}, [messages]);
// Auto-resize textarea
useEffect(() => {
const el = textareaRef.current;
if (!el) return;
el.style.height = 'auto';
el.style.height = Math.min(el.scrollHeight, 200) + 'px';
}, [input]);
const handleSend = async () => {
const content = input.trim();
if (!content || sending || isStreaming) return;
setInput('');
setSending(true);
try {
await api.messages.send(sessionId, chatId, content);
} catch (err) {
console.error('send failed:', err);
// Restore input on failure
setInput(content);
} finally {
setSending(false);
}
};
const handleStop = async () => {
try {
await api.messages.stop(sessionId);
} catch (err) {
console.error('stop failed:', err);
}
};
const handleKeyDown = (e: React.KeyboardEvent) => {
if (e.key === 'Enter' && !e.shiftKey) {
e.preventDefault();
handleSend();
}
};
// Filter out system messages for display (sentinels)
const visibleMessages = messages.filter((m) => m.role !== 'system');
return (
<div className="flex flex-col h-full">
{/* Connection indicator */}
<div className="flex items-center gap-2 px-4 py-2 border-b border-zinc-800 text-xs text-zinc-500">
<div
className={`w-1.5 h-1.5 rounded-full ${connected ? 'bg-green-500' : 'bg-red-500'}`}
/>
<span>{connected ? 'Connected' : 'Disconnected'}</span>
{isStreaming && (
<span className="text-blue-400 ml-auto">Generating...</span>
)}
</div>
{/* Messages list */}
<div className="flex-1 overflow-y-auto px-4 py-4">
{visibleMessages.length === 0 && (
<div className="text-center text-zinc-500 mt-8">
<p className="text-lg font-medium">BooCoder</p>
<p className="text-sm mt-1">Send a message to start coding.</p>
</div>
)}
{visibleMessages.map((msg) => (
<MessageBubble key={msg.id} message={msg} />
))}
<div ref={messagesEndRef} />
</div>
{/* Input area */}
<div className="border-t border-zinc-800 px-4 py-3">
<div className="flex items-end gap-2">
<textarea
ref={textareaRef}
value={input}
onChange={(e) => setInput(e.target.value)}
onKeyDown={handleKeyDown}
placeholder="Message BooCoder..."
rows={1}
className="flex-1 bg-zinc-800 border border-zinc-700 rounded-lg px-3 py-2 text-sm text-zinc-100 placeholder-zinc-500 resize-none focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-blue-500"
disabled={sending}
/>
{isStreaming ? (
<button
onClick={handleStop}
className="p-2 rounded-lg bg-red-600 hover:bg-red-500 text-white transition-colors"
title="Stop generation"
>
<Square size={18} />
</button>
) : (
<button
onClick={handleSend}
disabled={!input.trim() || sending}
className="p-2 rounded-lg bg-blue-600 hover:bg-blue-500 disabled:opacity-40 disabled:cursor-not-allowed text-white transition-colors"
title="Send message"
>
<Send size={18} />
</button>
)}
</div>
</div>
</div>
);
}

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import { useState, useEffect, useCallback } from 'react';
import { Check, X, RotateCcw, FileText, FilePlus, Trash2, RefreshCw } from 'lucide-react';
import type { PendingChange } from '@/api/types';
import { api } from '@/api/client';
interface Props {
sessionId: string;
onPendingChange: (cb: (change: PendingChange) => void) => () => void;
}
export function DiffPane({ sessionId, onPendingChange }: Props) {
const [changes, setChanges] = useState<PendingChange[]>([]);
const [loading, setLoading] = useState(true);
const [expandedId, setExpandedId] = useState<string | null>(null);
const fetchPending = useCallback(async () => {
try {
const result = await api.pending.list(sessionId);
setChanges(result);
} catch (err) {
console.error('fetch pending failed:', err);
} finally {
setLoading(false);
}
}, [sessionId]);
// Initial load
useEffect(() => {
fetchPending();
}, [fetchPending]);
// Listen for WS pending change events
useEffect(() => {
const unsub = onPendingChange((change) => {
setChanges((prev) => {
const idx = prev.findIndex((c) => c.id === change.id);
if (idx >= 0) {
const next = [...prev];
next[idx] = change;
return next;
}
return [...prev, change];
});
});
return unsub;
}, [onPendingChange]);
const pendingChanges = changes.filter((c) => c.status === 'pending');
const resolvedChanges = changes.filter((c) => c.status !== 'pending');
const handleApplyOne = async (id: string) => {
try {
await api.pending.applyOne(id);
setChanges((prev) =>
prev.map((c) => (c.id === id ? { ...c, status: 'applied' as const } : c)),
);
} catch (err) {
console.error('apply failed:', err);
}
};
const handleRejectOne = async (id: string) => {
try {
await api.pending.rejectOne(id);
setChanges((prev) =>
prev.map((c) => (c.id === id ? { ...c, status: 'rejected' as const } : c)),
);
} catch (err) {
console.error('reject failed:', err);
}
};
const handleRewindOne = async (id: string) => {
try {
await api.pending.rewindOne(id);
setChanges((prev) =>
prev.map((c) => (c.id === id ? { ...c, status: 'reverted' as const } : c)),
);
} catch (err) {
console.error('rewind failed:', err);
}
};
const handleApplyAll = async () => {
try {
const result = await api.pending.applyAll(sessionId);
const appliedIds = new Set(
result.results.filter((r) => r.success).map((r) => r.id),
);
setChanges((prev) =>
prev.map((c) =>
appliedIds.has(c.id) ? { ...c, status: 'applied' as const } : c,
),
);
} catch (err) {
console.error('apply all failed:', err);
}
};
const handleRejectAll = async () => {
// Reject each pending change individually (no batch reject endpoint)
for (const c of pendingChanges) {
await handleRejectOne(c.id);
}
};
const OpIcon = ({ op }: { op: PendingChange['operation'] }) => {
switch (op) {
case 'create':
return <FilePlus size={14} className="text-green-400" />;
case 'edit':
return <FileText size={14} className="text-blue-400" />;
case 'delete':
return <Trash2 size={14} className="text-red-400" />;
}
};
const StatusBadge = ({ status }: { status: PendingChange['status'] }) => {
const colors: Record<PendingChange['status'], string> = {
pending: 'bg-yellow-500/20 text-yellow-400',
applied: 'bg-green-500/20 text-green-400',
rejected: 'bg-zinc-500/20 text-zinc-400',
reverted: 'bg-orange-500/20 text-orange-400',
};
return (
<span className={`text-[10px] px-1.5 py-0.5 rounded ${colors[status]}`}>
{status}
</span>
);
};
return (
<div className="flex flex-col h-full">
{/* Header */}
<div className="flex items-center justify-between px-4 py-2 border-b border-zinc-800">
<h2 className="text-sm font-medium text-zinc-300">
Pending Changes
{pendingChanges.length > 0 && (
<span className="ml-1.5 text-xs text-zinc-500">
({pendingChanges.length})
</span>
)}
</h2>
<div className="flex items-center gap-1">
<button
onClick={fetchPending}
className="p-1 rounded hover:bg-zinc-800 text-zinc-400 hover:text-zinc-200"
title="Refresh"
>
<RefreshCw size={14} />
</button>
{pendingChanges.length > 0 && (
<>
<button
onClick={handleApplyAll}
className="text-xs px-2 py-1 rounded bg-green-600/80 hover:bg-green-600 text-white"
>
Apply All
</button>
<button
onClick={handleRejectAll}
className="text-xs px-2 py-1 rounded bg-zinc-700 hover:bg-zinc-600 text-zinc-300"
>
Reject All
</button>
</>
)}
</div>
</div>
{/* Changes list */}
<div className="flex-1 overflow-y-auto">
{loading && (
<div className="text-center text-zinc-500 text-sm py-8">Loading...</div>
)}
{!loading && changes.length === 0 && (
<div className="text-center text-zinc-500 text-sm py-8">
No pending changes yet.
</div>
)}
{/* Pending changes first */}
{pendingChanges.map((change) => (
<ChangeItem
key={change.id}
change={change}
expanded={expandedId === change.id}
onToggle={() =>
setExpandedId((prev) => (prev === change.id ? null : change.id))
}
onApply={() => handleApplyOne(change.id)}
onReject={() => handleRejectOne(change.id)}
OpIcon={OpIcon}
StatusBadge={StatusBadge}
/>
))}
{/* Resolved changes */}
{resolvedChanges.length > 0 && pendingChanges.length > 0 && (
<div className="border-t border-zinc-800 my-1" />
)}
{resolvedChanges.map((change) => (
<ChangeItem
key={change.id}
change={change}
expanded={expandedId === change.id}
onToggle={() =>
setExpandedId((prev) => (prev === change.id ? null : change.id))
}
onRewind={
change.status === 'applied'
? () => handleRewindOne(change.id)
: undefined
}
OpIcon={OpIcon}
StatusBadge={StatusBadge}
/>
))}
</div>
</div>
);
}
interface ChangeItemProps {
change: PendingChange;
expanded: boolean;
onToggle: () => void;
onApply?: () => void;
onReject?: () => void;
onRewind?: () => void;
OpIcon: React.ComponentType<{ op: PendingChange['operation'] }>;
StatusBadge: React.ComponentType<{ status: PendingChange['status'] }>;
}
function ChangeItem({
change,
expanded,
onToggle,
onApply,
onReject,
onRewind,
OpIcon,
StatusBadge,
}: ChangeItemProps) {
const fileName = change.file_path.split('/').pop() || change.file_path;
const dirPath = change.file_path.split('/').slice(0, -1).join('/');
return (
<div className="border-b border-zinc-800/50">
<div
className="flex items-center gap-2 px-4 py-2 hover:bg-zinc-800/50 cursor-pointer"
onClick={onToggle}
>
<OpIcon op={change.operation} />
<div className="flex-1 min-w-0">
<span className="text-sm font-mono text-zinc-200 truncate block">
{fileName}
</span>
{dirPath && (
<span className="text-[11px] text-zinc-500 truncate block">
{dirPath}
</span>
)}
</div>
<StatusBadge status={change.status} />
{change.status === 'pending' && (
<div className="flex items-center gap-1 ml-1">
<button
onClick={(e) => {
e.stopPropagation();
onApply?.();
}}
className="p-1 rounded hover:bg-green-600/30 text-green-400"
title="Apply"
>
<Check size={14} />
</button>
<button
onClick={(e) => {
e.stopPropagation();
onReject?.();
}}
className="p-1 rounded hover:bg-red-600/30 text-red-400"
title="Reject"
>
<X size={14} />
</button>
</div>
)}
{change.status === 'applied' && onRewind && (
<button
onClick={(e) => {
e.stopPropagation();
onRewind();
}}
className="p-1 rounded hover:bg-orange-600/30 text-orange-400"
title="Rewind"
>
<RotateCcw size={14} />
</button>
)}
</div>
{expanded && (
<div className="px-4 pb-3">
{change.operation === 'edit' && (
<div className="space-y-2">
{change.old_string && (
<div className="rounded bg-red-950/30 border border-red-900/30 p-2">
<div className="text-[10px] text-red-400 mb-1 font-medium">
Remove
</div>
<pre className="text-xs text-red-200 whitespace-pre-wrap break-all font-mono">
{change.old_string}
</pre>
</div>
)}
{change.new_string && (
<div className="rounded bg-green-950/30 border border-green-900/30 p-2">
<div className="text-[10px] text-green-400 mb-1 font-medium">
Add
</div>
<pre className="text-xs text-green-200 whitespace-pre-wrap break-all font-mono">
{change.new_string}
</pre>
</div>
)}
</div>
)}
{change.operation === 'create' && change.content && (
<div className="rounded bg-green-950/30 border border-green-900/30 p-2">
<div className="text-[10px] text-green-400 mb-1 font-medium">
New file
</div>
<pre className="text-xs text-green-200 whitespace-pre-wrap break-all font-mono max-h-60 overflow-y-auto">
{change.content.length > 2000
? change.content.slice(0, 2000) + '\n... (truncated)'
: change.content}
</pre>
</div>
)}
{change.operation === 'delete' && (
<div className="rounded bg-red-950/30 border border-red-900/30 p-2 text-xs text-red-300">
This file will be deleted.
</div>
)}
</div>
)}
</div>
);
}

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import { useState } from 'react';
import { Code2, MessageSquare, GitPullRequest } from 'lucide-react';
interface Props {
chatPane: React.ReactNode;
diffPane: React.ReactNode;
}
export function Layout({ chatPane, diffPane }: Props) {
const [activeTab, setActiveTab] = useState<'chat' | 'diff'>('chat');
return (
<div className="flex flex-col h-screen bg-zinc-900">
{/* Top bar */}
<header className="flex items-center gap-3 px-4 py-2 border-b border-zinc-800 bg-zinc-900/95">
<Code2 size={20} className="text-blue-400" />
<h1 className="text-sm font-semibold text-zinc-200">BooCoder</h1>
</header>
{/* Mobile tab bar (visible below lg breakpoint) */}
<div className="lg:hidden flex border-b border-zinc-800">
<button
onClick={() => setActiveTab('chat')}
className={`flex-1 flex items-center justify-center gap-1.5 py-2 text-sm ${
activeTab === 'chat'
? 'text-blue-400 border-b-2 border-blue-400'
: 'text-zinc-500'
}`}
>
<MessageSquare size={14} />
Chat
</button>
<button
onClick={() => setActiveTab('diff')}
className={`flex-1 flex items-center justify-center gap-1.5 py-2 text-sm ${
activeTab === 'diff'
? 'text-blue-400 border-b-2 border-blue-400'
: 'text-zinc-500'
}`}
>
<GitPullRequest size={14} />
Changes
</button>
</div>
{/* Desktop split layout */}
<div className="flex-1 hidden lg:flex overflow-hidden">
<div className="w-[60%] border-r border-zinc-800 overflow-hidden">
{chatPane}
</div>
<div className="w-[40%] overflow-hidden">
{diffPane}
</div>
</div>
{/* Mobile: show only the active tab */}
<div className="flex-1 lg:hidden overflow-hidden">
{activeTab === 'chat' ? chatPane : diffPane}
</div>
</div>
);
}

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import Markdown from 'react-markdown';
import remarkGfm from 'remark-gfm';
import type { Message } from '@/api/types';
import { Wrench, AlertCircle, Loader2 } from 'lucide-react';
interface Props {
message: Message;
}
export function MessageBubble({ message }: Props) {
if (message.role === 'tool') {
return <ToolResultBubble message={message} />;
}
const isUser = message.role === 'user';
const isStreaming = message.status === 'streaming';
const isFailed = message.status === 'failed';
return (
<div className={`flex ${isUser ? 'justify-end' : 'justify-start'} mb-3`}>
<div
className={`max-w-[85%] rounded-lg px-4 py-2.5 ${
isUser
? 'bg-blue-600 text-white'
: 'bg-zinc-800 text-zinc-100 border border-zinc-700'
}`}
>
{isFailed && (
<div className="flex items-center gap-1.5 text-red-400 text-xs mb-1">
<AlertCircle size={12} />
<span>Failed</span>
</div>
)}
{message.tool_calls && message.tool_calls.length > 0 && (
<div className="mb-2 space-y-1">
{message.tool_calls.map((tc) => (
<div
key={tc.id}
className="flex items-center gap-1.5 text-xs text-zinc-400 bg-zinc-900/50 rounded px-2 py-1"
>
<Wrench size={11} />
<span className="font-mono">{tc.name}</span>
<span className="text-zinc-500 truncate max-w-[200px]">
{truncateArgs(tc.arguments)}
</span>
</div>
))}
</div>
)}
{message.content.trim() && (
<div className="prose prose-invert prose-sm max-w-none [&_pre]:bg-zinc-900 [&_pre]:p-3 [&_pre]:rounded [&_pre]:overflow-x-auto [&_code]:text-zinc-300 [&_p]:my-1.5">
<Markdown remarkPlugins={[remarkGfm]}>{message.content}</Markdown>
</div>
)}
{isStreaming && !message.content.trim() && (
<div className="flex items-center gap-1.5 text-zinc-400">
<Loader2 size={14} className="animate-spin" />
<span className="text-xs">Thinking...</span>
</div>
)}
{isStreaming && message.content.trim() && (
<span className="inline-block w-1.5 h-4 bg-zinc-400 animate-pulse ml-0.5 align-middle" />
)}
</div>
</div>
);
}
function ToolResultBubble({ message }: Props) {
const result = message.tool_results;
if (!result) return null;
const isError = result.error;
const output = result.output || '';
const displayOutput =
output.length > 300 ? output.slice(0, 300) + '...' : output;
return (
<div className="flex justify-start mb-2 ml-6">
<div
className={`max-w-[80%] rounded px-3 py-2 text-xs font-mono border ${
isError
? 'bg-red-950/30 border-red-800/50 text-red-300'
: 'bg-zinc-800/50 border-zinc-700/50 text-zinc-400'
}`}
>
{result.truncated && (
<span className="text-yellow-500 text-[10px] block mb-1">
[truncated]
</span>
)}
<pre className="whitespace-pre-wrap break-all">{displayOutput}</pre>
</div>
</div>
);
}
function truncateArgs(args: string): string {
if (!args) return '';
try {
const parsed = JSON.parse(args);
const keys = Object.keys(parsed);
if (keys.length === 0) return '';
const first = keys[0]!;
const val = String(parsed[first]);
const display = val.length > 40 ? val.slice(0, 40) + '...' : val;
return `${first}: ${display}`;
} catch {
return args.length > 50 ? args.slice(0, 50) + '...' : args;
}
}