feat: validate knowledge and source forms

frontend/src/App.vue

@@ -11,12 +11,13 @@ const nav=[{id:'chat',label:'智能问答',icon:MessageSquareText},{id:'knowledg
 const filtered=computed(()=>items.value.filter(x=>`${x.title} ${x.category} ${x.content}`.toLowerCase().includes(search.value.toLowerCase())))
 async function refresh(){try{items.value=await getKnowledge();error.value=''}catch{error.value='无法读取后端知识库，请确认 API 和 PostgreSQL 已启动。'}}
 async function refreshSources(){try{sources.value=(await getSources(sourceSearch.value)).items;error.value=''}catch{error.value='无法读取来源列表，请确认 API 和 PostgreSQL 已启动。'}}
-async function saveSource(){error.value='';notice.value='';try{await createSource({...sourceForm.value,...(sourceForm.value.source_url?{source_url:sourceForm.value.source_url}:{})});sourceForm.value={name:'',source_url:'',notes:''};showSourceForm.value=false;notice.value='来源已登记，可继续创建关联文档和知识条目。';await refreshSources()}catch(e){error.value=e instanceof Error?e.message:'保存失败'}}
+async function saveSource(){error.value='';notice.value='';if(!sourceForm.value.name.trim()){error.value='请填写来源名称。';return}if(!validUrl(sourceForm.value.source_url)){error.value='来源网址必须是有效的 http(s) 地址。';return}try{await createSource({...sourceForm.value,name:sourceForm.value.name.trim(),...(sourceForm.value.source_url?{source_url:sourceForm.value.source_url}:{})});sourceForm.value={name:'',source_url:'',notes:''};showSourceForm.value=false;notice.value='来源已登记，可继续创建关联文档和知识条目。';await refreshSources()}catch(e){error.value=e instanceof Error?e.message:'保存失败'}}
 let sourceSearchTimer:number|undefined
 watch(sourceSearch,()=>{window.clearTimeout(sourceSearchTimer);sourceSearchTimer=window.setTimeout(refreshSources,260)})
 onMounted(async()=>{try{await getHealth();apiStatus.value='已连接'}catch{apiStatus.value='未连接'}await Promise.all([refresh(),refreshSources()])})
 async function send(){const q=question.value.trim();if(!q||busy.value)return;messages.value.push({role:'user',content:q});question.value='';busy.value=true;try{const r=await askQuestion(q);messages.value.push({role:'assistant',content:r.answer,sources:r.sources})}catch{messages.value.push({role:'assistant',content:'暂时无法连接后端 API。请确认 FastAPI 已启动。'})}finally{busy.value=false}}
-async function save(){error.value='';notice.value='';try{await createKnowledge({...form.value,...(form.value.source_url?{source_url:form.value.source_url}:{})});form.value={title:'',category:'旅游资源',content:'',source_url:''};showForm.value=false;notice.value='已保存为待审核条目，尚未进入检索索引。';await refresh()}catch(e){error.value=e instanceof Error?e.message:'保存失败'}}
+function validUrl(value:string){try{if(value)new URL(value);return true}catch{return false}}
+async function save(){error.value='';notice.value='';if(!form.value.title.trim()||!form.value.content.trim()){error.value='请填写知识标题和正文。';return}if(!validUrl(form.value.source_url)){error.value='来源网址必须是有效的 http(s) 地址。';return}try{await createKnowledge({...form.value,title:form.value.title.trim(),content:form.value.content.trim(),...(form.value.source_url?{source_url:form.value.source_url}:{})});form.value={title:'',category:'旅游资源',content:'',source_url:''};showForm.value=false;notice.value='已保存为待审核条目，尚未进入检索索引。';await refresh()}catch(e){error.value=e instanceof Error?e.message:'保存失败'}}
 </script>
 <template><div class="shell"><aside class="sidebar"><div class="brand"><div class="mark"><Bot :size="23"/></div><div><b>边疆红驿</b><small>NALATI KNOWLEDGE HUB</small></div></div><p class="muted label">功能列表</p><nav><button v-for="n in nav" :key="n.id" :class="{active:page===n.id}" @click="page=n.id"><component :is="n.icon" :size="18"/>{{n.label}}<ChevronRight v-if="page===n.id" class="chev" :size="15"/></button></nav><div class="quick-actions"><p class="muted label">快捷操作</p><button v-if="page==='knowledge'" class="side-action" @click="showForm=true"><Plus :size="16"/>新增知识</button><button v-if="page==='sources'" class="side-action" @click="showSourceForm=true"><Plus :size="16"/>新增来源</button><p v-if="page==='chat'" class="side-hint">选择示例问题，或直接开始提问。</p><p v-if="page==='evaluation'" class="side-hint">实验结果只展示真实运行数据。</p></div><div class="side-bottom"><div class="tip"><ShieldCheck :size="17"/><div><b>可信知识服务</b><p>优先展示可核验来源，信息不足时明确提示。</p></div></div><p class="api">● API {{apiStatus}} <span>v0.1.0</span></p></div></aside><main><header><span>边疆红驿　/　{{nav.find(n=>n.id===page)?.label}}</span><div><span class="pill">● 原型阶段</span><i>研</i></div></header><section class="content">
 <div v-if="page==='chat'"><div class="heading"><div><small class="eyebrow"><Sparkles :size="14"/> LOCAL KNOWLEDGE ASSISTANT</small><h1>文旅知识，问得明白</h1><p>面向那拉提文旅与民宿服务的知识问答原型</p></div><span class="chip"><ShieldCheck :size="15"/> 来源可追溯 · 设计目标</span></div><div class="chat-layout"><div class="card chat"><div class="chat-head"><div class="mark"><Bot :size="20"/></div><div><b>边疆红驿助手</b><small>问答服务原型</small></div></div><div class="messages"><div v-for="(m,i) in messages" :key="i" class="message" :class="m.role"><small>{{m.role==='assistant'?'智能助手':'你'}}</small><p>{{m.content}}</p><div v-if="m.sources?.length" class="sources"><b><Link2 :size="14"/> 参考来源</b><a v-for="s in m.sources" :key="s.title" :href="s.source_url ?? undefined" target="_blank">{{s.title}}</a></div></div><p v-if="busy">正在请求后端…</p></div><form class="composer" @submit.prevent="send"><textarea v-model="question" placeholder="输入你想了解的文旅问题…" rows="2" @keydown.enter.exact.prevent="send"/><div><small>当前为基础接口，尚未接入真实检索</small><button class="primary" :disabled="busy||!question.trim()"><Send :size="15"/> 发送</button></div></form></div><aside class="suggest"><b><Sparkles :size="16"/> 你可以这样问</b><button @click="question='那拉提有哪些值得了解的旅游资源？'"><Globe2/>旅游资源 <ChevronRight/></button><button @click="question='有哪些经过核验的红色文化资料？'"><BookOpen/>红色文化 <ChevronRight/></button><button @click="question='民宿服务信息应如何核验？'"><ShieldCheck/>民宿服务 <ChevronRight/></button><div class="notice"><b><AlertCircle :size="15"/> 信息说明</b><p>本项目仍处于原型阶段。演示内容不代表已核验的地方文旅事实。</p></div></aside></div></div>