feat: 前后端分离架构 — FastAPI SSE后端 + Vue 3前端

将单体 Streamlit 应用拆分为三层架构:
- api_server.py: FastAPI SSE 流式后端 (端口 8000)
- frontend/: Vue 3 + Vite + Pinia 聊天前端 (端口 5173)
- agent/graph.py: 新增 node_start 回调支持
- 更新启动脚本为三服务模式

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
2026-05-21 20:04:27 +08:00
parent 2befd44430
commit 74f3f03d2c
29 changed files with 3668 additions and 72 deletions
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<script setup lang="ts">
import { ref, computed } from 'vue'
import { fileIcon } from '../utils/format'
const props = defineProps<{
disabled: boolean
}>()
const emit = defineEmits<{
send: [text: string, files: File[]]
}>()
const text = ref('')
const attachedFiles = ref<{ id: string; name: string; file: File }[]>([])
const textareaRef = ref<HTMLTextAreaElement | null>(null)
const fileInputRef = ref<HTMLInputElement | null>(null)
const canSend = computed(() =>
!props.disabled && (text.value.trim() || attachedFiles.value.length > 0)
)
function triggerFileInput() {
fileInputRef.value?.click()
}
function handleFileSelect(e: Event) {
const input = e.target as HTMLInputElement
if (input.files) {
for (const f of input.files) {
attachedFiles.value.push({ id: crypto.randomUUID(), name: f.name, file: f })
}
}
input.value = ''
}
function removeFile(id: string) {
attachedFiles.value = attachedFiles.value.filter(f => f.id !== id)
}
function handleSend() {
if (!canSend.value) return
emit('send', text.value, attachedFiles.value.map(f => f.file))
text.value = ''
attachedFiles.value = []
}
function handleKeydown(e: KeyboardEvent) {
if (e.key === 'Enter' && !e.shiftKey) {
e.preventDefault()
handleSend()
}
}
// Auto-resize textarea
function autoResize() {
const el = textareaRef.value
if (el) {
el.style.height = 'auto'
el.style.height = Math.min(el.scrollHeight, 120) + 'px'
}
}
// Drag & drop
function handleDrop(e: DragEvent) {
e.preventDefault()
if (e.dataTransfer?.files) {
for (const f of e.dataTransfer.files) {
attachedFiles.value.push({ id: crypto.randomUUID(), name: f.name, file: f })
}
}
}
function handleDragover(e: DragEvent) {
e.preventDefault()
if (e.dataTransfer) {
e.dataTransfer.dropEffect = 'copy'
}
}
// Paste support
function handlePaste(e: ClipboardEvent) {
const items = e.clipboardData?.items
if (!items) return
for (const item of items) {
if (item.kind === 'file') {
const f = item.getAsFile()
if (f) {
e.preventDefault()
attachedFiles.value.push({ id: crypto.randomUUID(), name: f.name || 'clipboard.png', file: f })
}
}
}
}
</script>
<template>
<div class="unified-input" @drop="handleDrop" @dragover="handleDragover">
<!-- File chips -->
<div v-if="attachedFiles.length > 0" class="file-chips">
<div v-for="f in attachedFiles" :key="f.id" class="chip">
<span class="chip-icon">{{ fileIcon(f.name) }}</span>
<span class="chip-name">{{ f.name }}</span>
<button class="chip-remove" @click="removeFile(f.id)">&times;</button>
</div>
</div>
<!-- Input row -->
<div class="input-row">
<button class="attach-btn" @click="triggerFileInput" title="附加文件">
<svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
<path d="M21.44 11.05l-9.19 9.19a6 6 0 01-8.49-8.49l9.19-9.19a4 4 0 015.66 5.66l-9.2 9.19a2 2 0 01-2.83-2.83l8.49-8.48"/>
</svg>
</button>
<textarea
ref="textareaRef"
v-model="text"
class="text-input"
placeholder="描述您的报表需求... (Enter 发送, Shift+Enter 换行)"
:disabled="disabled"
@keydown="handleKeydown"
@input="autoResize"
@paste="handlePaste"
rows="1"
></textarea>
<button
class="send-btn"
:disabled="!canSend"
@click="handleSend"
title="发送"
>
<svg width="20" height="20" viewBox="0 0 24 24" fill="currentColor">
<path d="M2.01 21L23 12 2.01 3 2 10l15 2-15 2z"/>
</svg>
</button>
</div>
<input
ref="fileInputRef"
type="file"
multiple
accept="image/*,.pdf,.docx,.doc,.xlsx,.xls,.txt,.csv"
style="display:none"
@change="handleFileSelect"
/>
</div>
</template>
<style scoped>
.unified-input {
border: 1px solid #45475a;
border-radius: 12px;
background: #1e1e2e;
margin: 0 24px 16px;
padding: 8px 12px;
transition: border-color 0.2s;
}
.unified-input:focus-within {
border-color: #cba6f7;
}
.file-chips {
display: flex;
flex-wrap: wrap;
gap: 6px;
margin-bottom: 8px;
}
.chip {
display: flex;
align-items: center;
gap: 4px;
background: #313244;
border-radius: 6px;
padding: 2px 8px;
font-size: 12px;
}
.chip-icon {
font-size: 14px;
}
.chip-name {
color: #cdd6f4;
max-width: 140px;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.chip-remove {
background: none;
border: none;
color: #6c7086;
cursor: pointer;
font-size: 16px;
padding: 0;
line-height: 1;
}
.chip-remove:hover {
color: #f38ba8;
}
.input-row {
display: flex;
align-items: flex-end;
gap: 8px;
}
.attach-btn {
flex-shrink: 0;
width: 36px;
height: 36px;
border: none;
background: #313244;
color: #a6adc8;
border-radius: 8px;
cursor: pointer;
display: flex;
align-items: center;
justify-content: center;
}
.attach-btn:hover {
background: #45475a;
color: #cdd6f4;
}
.text-input {
flex: 1;
background: transparent;
border: none;
color: #cdd6f4;
font-size: 14px;
font-family: inherit;
resize: none;
outline: none;
line-height: 1.5;
padding: 8px 0;
min-height: 36px;
max-height: 120px;
}
.text-input::placeholder {
color: #6c7086;
}
.send-btn {
flex-shrink: 0;
width: 36px;
height: 36px;
border: none;
background: #cba6f7;
color: #1e1e2e;
border-radius: 8px;
cursor: pointer;
display: flex;
align-items: center;
justify-content: center;
}
.send-btn:hover:not(:disabled) {
background: #b4befe;
}
.send-btn:disabled {
background: #45475a;
color: #6c7086;
cursor: not-allowed;
}
</style>