music(inspire): 加「💡 今天练什么」灵感推荐 modal

- 后端 POST /api/inspire 流式 SSE：随机 keyword 池（23 个）+ 用户曲库画像（recent/top/least）+ Tavily 热点搜索 → gemma stream（temperature=1.0）
- Tavily key 走 k8s Secret tavily-creds（复用 mochi config 同一 token）
- 每次按按钮：keyword 随机 + 用户可输 hint（"想练快歌" / "陪儿子" / "新东西"）
- 输出强制格式：4 首歌（'补回来' 2 + '试试新' 2），每首歌名-歌手 + 一句理由
- 前端 topbar 加 💡 按钮，modal 流式渲染（极简 md：**bold** + 列表）

apps/music/frontend/src/lib/api.js

@@ -133,6 +133,47 @@ export async function streamChat(pieceId, message, onDelta, signal) {
   return { ok: true }
 }
 
+// ---- inspire ----
+
+export async function streamInspire(hint, onDelta, signal) {
+  const resp = await fetch('/api/inspire', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ hint: hint || null }),
+    signal,
+  })
+  if (!resp.ok) {
+    const text = await resp.text().catch(() => '')
+    return { ok: false, error: text || `${resp.status}` }
+  }
+  const reader = resp.body.getReader()
+  const dec = new TextDecoder()
+  let buf = ''
+  let lastEvent = 'message'
+  let errorMsg = ''
+  while (true) {
+    const { done, value } = await reader.read()
+    if (done) break
+    buf += dec.decode(value, { stream: true })
+    let idx
+    while ((idx = buf.indexOf('\n')) >= 0) {
+      const line = buf.slice(0, idx)
+      buf = buf.slice(idx + 1)
+      if (line.startsWith('event:')) {
+        lastEvent = line.slice(6).trim()
+      } else if (line.startsWith('data:')) {
+        const data = line.slice(5).replace(/^ /, '')
+        if (lastEvent === 'error') errorMsg = data
+        else if (lastEvent !== 'done') onDelta(data)
+      } else if (line === '') {
+        lastEvent = 'message'
+      }
+    }
+  }
+  if (errorMsg) return { ok: false, error: errorMsg }
+  return { ok: true }
+}
+
 // ---- tags ----
 
 export function listTags() {

apps/music/frontend/src/views/PlayerView.vue

@@ -9,6 +9,7 @@
         placeholder="搜索曲目 / 歌手"
       />
       <span class="count">{{ filtered.length }} / {{ pieces.length }} 首</span>
+      <button class="btn-inspire" title="今天练什么？" @click="openInspire">💡</button>
       <router-link to="/upload" class="btn-add" title="新增曲目">＋</router-link>
     </header>
 
@@ -258,6 +259,32 @@
         </template>
       </section>
 
+      <!-- 灵感 modal -->
+      <div v-if="inspireOpen" class="ins-overlay" @click.self="closeInspire">
+        <div class="ins-modal">
+          <header class="ins-head">
+            <span>💡 今天练什么</span>
+            <button class="ins-close" @click="closeInspire">✕</button>
+          </header>
+          <div class="ins-hint-row">
+            <input
+              v-model="inspireHint"
+              class="ins-hint"
+              :disabled="inspireRunning"
+              placeholder="可选：心情/目标（"想轻松点" / "陪儿子" / "学新东西"）"
+              @keydown.enter.prevent="runInspire"
+            />
+            <button
+              class="ins-go"
+              :disabled="inspireRunning"
+              @click="runInspire"
+            >{{ inspireRunning ? '⏳ 生成中…' : '换一批' }}</button>
+          </div>
+          <div class="ins-body" v-html="inspireHtml"></div>
+          <p v-if="inspireError" class="ins-err">{{ inspireError }}</p>
+        </div>
+      </div>
+
       <!-- 全屏乐谱 overlay：再点一下关闭，或按 ESC -->
       <div
         v-if="fullscreenSrc"
@@ -330,6 +357,7 @@ import {
   listChat,
   clearChat,
   streamChat,
+  streamInspire,
 } from '../lib/api.js'
 import { parseLrc } from '../lib/lrc.js'
 
@@ -397,6 +425,61 @@ let lastReportedId = null
 // fullscreen 乐谱
 const fullscreenSrc = ref(null)
 
+// 灵感 modal
+const inspireOpen = ref(false)
+const inspireHint = ref('')
+const inspireText = ref('')
+const inspireRunning = ref(false)
+const inspireError = ref('')
+let inspireAbort = null
+const inspireHtml = computed(() => mdLite(inspireText.value))
+
+// 极简 markdown：**粗体** + 列表 + 换行 → html
+function mdLite(s) {
+  if (!s) return '<p class="ins-empty">点「换一批」让 LLM 给你推几首</p>'
+  // 转义 html，保留我们后面要插的 tag
+  let h = s
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+  // **bold**
+  h = h.replace(/\*\*(.+?)\*\*/g, '<b>$1</b>')
+  // 行首 - / * 列表
+  h = h.replace(/(^|\n)\s*[-*]\s+/g, '$1• ')
+  // 段落间双换行 → <p>
+  return h.split(/\n{2,}/).map(p => `<p>${p.replace(/\n/g, '<br>')}</p>`).join('')
+}
+
+function openInspire() {
+  inspireOpen.value = true
+  if (!inspireText.value) runInspire()
+}
+function closeInspire() {
+  if (inspireAbort) { try { inspireAbort.abort() } catch {} ; inspireAbort = null }
+  inspireRunning.value = false
+  inspireOpen.value = false
+}
+
+async function runInspire() {
+  if (inspireRunning.value) return
+  inspireText.value = ''
+  inspireError.value = ''
+  inspireRunning.value = true
+  const ctrl = new AbortController()
+  inspireAbort = ctrl
+  try {
+    const r = await streamInspire(inspireHint.value.trim(), (delta) => {
+      inspireText.value += delta
+    }, ctrl.signal)
+    if (!r.ok) inspireError.value = r.error || '出错'
+  } catch (e) {
+    if (e.name !== 'AbortError') inspireError.value = e.message || String(e)
+  } finally {
+    inspireRunning.value = false
+    inspireAbort = null
+  }
+}
+
 // chord —— 两个 mode 各自独立 state
 const chordStates = ref({ letters: 'idle', functional: 'idle' })
 const chordErrors = ref({ letters: '', functional: '' })
@@ -954,6 +1037,104 @@ onBeforeUnmount(() => {
 }
 .topbar .search:focus { border-color: var(--accent-strong); }
 .topbar .count { color: var(--text-mute); font-size: 12px; white-space: nowrap; }
+.btn-inspire {
+  width: 36px; height: 36px;
+  border-radius: 50%;
+  background: rgba(192, 132, 252, 0.15);
+  color: var(--accent);
+  font-size: 16px;
+  display: inline-flex; align-items: center; justify-content: center;
+}
+.btn-inspire:hover { background: rgba(192, 132, 252, 0.3); }
+
+.ins-overlay {
+  position: fixed;
+  inset: 0;
+  z-index: 300;
+  background: rgba(0, 0, 0, 0.7);
+  display: flex;
+  align-items: flex-start;
+  justify-content: center;
+  padding: 60px 16px 16px;
+  backdrop-filter: blur(2px);
+}
+.ins-modal {
+  background: var(--bg-card);
+  border: 1px solid var(--border);
+  border-radius: 12px;
+  width: 100%;
+  max-width: 640px;
+  max-height: calc(100vh - 76px);
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
+}
+.ins-head {
+  padding: 14px 18px;
+  font-size: 16px;
+  font-weight: 600;
+  border-bottom: 1px solid var(--border-soft);
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  color: var(--accent);
+}
+.ins-close {
+  font-size: 16px;
+  color: var(--text-mute);
+  width: 28px; height: 28px;
+  border-radius: 50%;
+}
+.ins-close:hover { background: rgba(255,255,255,0.06); color: var(--text); }
+
+.ins-hint-row {
+  display: flex;
+  gap: 8px;
+  padding: 12px 18px;
+  border-bottom: 1px solid var(--border-soft);
+}
+.ins-hint {
+  flex: 1;
+  background: var(--bg-elev);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 8px 12px;
+  font-size: 13px;
+  color: var(--text);
+}
+.ins-hint:focus { border-color: var(--accent-strong); outline: none; }
+.ins-go {
+  background: var(--accent-strong);
+  color: #fff;
+  padding: 8px 16px;
+  border-radius: 6px;
+  font-size: 13px;
+  font-weight: 600;
+  white-space: nowrap;
+}
+.ins-go:hover:not(:disabled) { background: var(--accent); }
+
+.ins-body {
+  flex: 1;
+  overflow-y: auto;
+  padding: 16px 18px 24px;
+  font-size: 14px;
+  line-height: 1.7;
+  color: var(--text);
+}
+.ins-body :deep(p) { margin: 0 0 8px; }
+.ins-body :deep(b) { color: var(--accent); }
+.ins-body :deep(.ins-empty) { color: var(--text-mute); text-align: center; padding: 40px 0; }
+.ins-err {
+  margin: 0 18px 16px;
+  color: var(--accent-red);
+  background: rgba(239,68,68,0.08);
+  padding: 8px 12px;
+  border-radius: 6px;
+  font-size: 13px;
+}
+
 .topbar .btn-add {
   width: 36px; height: 36px;
   border-radius: 50%;