fix: render chat media by URL (images/video/voice) instead of unknown-type placeholder

MessageBubble.vue was keys off the (incomplete) type code, so many messages
with real OSS media URLs (https://wx.oss.yunkecn.com/.../*.webp|*.mp4) showed
as '[未知消息]'. Rendering is now URL-driven: pick the best http URL from
file_url > file_hd_url > file_th_url, then render by extension
(image/video/audio/file). Type code is only used as a last-resort label.

- MessageBubble.vue: URL-driven cascade (URL by ext → duration →
  transcription → text → structured-type placeholder → localized tag).
  Image/video/audio/file children @click.stop so the all-fields drawer
  still opens on bubble click but not on media interactions.
- format.ts: wechatTypeLabel(type_raw) maps known codes (3→图片, 34→语音,
  43→图片/表情, 49→文件/名片, 42→名片, 9→表情, 20→红包/转账).
- ChatTimeline.vue drawer type tag uses wechatTypeLabel for WeChat msgs.
- style.css: compact .yk-msg__audio player for voice-with-URL messages.

Verified against smoke.db: 25 type-3 images + 3 type-43 videos that
previously showed '[未知消息]' now render as images/video. Build clean.

Co-Authored-By: Claude <noreply@anthropic.com>

yunkes/src/components/MessageBubble.vue

@@ -1,22 +1,32 @@
 <script setup lang="ts">
 import { computed } from 'vue'
-import { Microphone, VideoPlay, Document, Picture } from '@element-plus/icons-vue'
+import { Microphone, VideoPlay, Document, Picture, Paperclip } from '@element-plus/icons-vue'
 import type { Message } from '@/api/types'
-import { formatDuration, formatTime } from '@/utils/format'
+import { formatDuration, formatTime, wechatTypeLabel } from '@/utils/format'
 
 const props = defineProps<{ message: Message }>()
 
 /**
- * One chat row. Layout/direction is driven by `is_send`; content by `type`.
- * Media URLs are rendered straight from the OSS `file_*_url` fields — the
- * `/api/media/{hash}` streaming endpoint exists for cases where the OSS URL is
- * missing, but the current MessageOut schema exposes `file_url` only, so we
- * degrade gracefully via `file_th_url || file_url` (forward-compatible).
+ * One chat row. Layout/direction is driven by `is_send`; **content is
+ * URL-driven, not type-code-driven** — many upstream WeChat messages carry a
+ * numeric `type_raw` (3=image_legacy, 43=图片/表情, ...) that the legacy code
+ * mapped to the `unknown` bucket even though their `file_*_url` points to a
+ * perfectly good OSS asset. We now render by media-URL presence + extension
+ * first, and only fall back to the type code as a last resort.
+ *
+ * Cascade (per task spec):
+ *   1. http media URL (`file_url` > `file_hd_url` > `file_th_url`) → by ext:
+ *      image / video / audio / generic file (📎 link).
+ *   2. `duration` present (voice w/o URL) → voice chip.
+ *   3. `transcription_text` → text bubble.
+ *   4. `text` present → text bubble.
+ *   5. structured `type` placeholder (WA image w/o URL, etc.).
+ *   6. else → `[图片/表情 (type_raw)]` style tag using `wechatTypeLabel`.
  *
  * Clicking anywhere on the bubble (other than interactive children such as the
- * image preview or the file download link) emits `open-detail` so the parent
- * timeline can open the all-fields drawer for this message. The image preview
- * and download link stop propagation so their own interactions still work.
+ * image preview, video, audio player, or file download link) emits
+ * `open-detail` so the parent timeline can open the all-fields drawer. Those
+ * interactive children `@click.stop` so their own interactions still work.
  */
 const emit = defineEmits<{ (e: 'open-detail', message: Message): void }>()
 
@@ -33,11 +43,73 @@ const senderLabel = computed(
 
 const timeLabel = computed(() => formatTime(props.message.timestamp))
 
-// Image preview list for el-image (full-size click-to-zoom).
-const imageFullUrl = computed(() => props.message.file_hd_url || props.message.file_url)
-const imageThumbUrl = computed(
-  () => props.message.file_th_url || props.message.file_url,
-)
+const HTTP_RE = /^https?:\/\//i
+
+/**
+ * Best http media URL on the message, honoring the precedence
+ * `file_url` > `file_hd_url` > `file_th_url`. Non-http values (e.g. type-3
+ * opaque ids, WA `mediaName` filenames) are skipped so they fall through to
+ * the text/type fallbacks instead of producing broken `<img src>`.
+ */
+const bestMediaUrl = computed<string | undefined>(() => {
+  const m = props.message
+  for (const u of [m.file_url, m.file_hd_url, m.file_th_url]) {
+    if (u && HTTP_RE.test(u)) return u
+  }
+  return undefined
+})
+
+const IMAGE_EXTS = new Set(['jpg', 'jpeg', 'webp', 'png', 'gif', 'bmp', 'tif', 'tiff'])
+const VIDEO_EXTS = new Set(['mp4', 'mov', 'webm', 'm4v', 'avi', 'mkv'])
+const AUDIO_EXTS = new Set(['mp3', 'amr', 'silk', 'm4a', 'aac', 'wav', 'ogg'])
+
+/** Lowercase extension of the URL path (before ?/#); null when none. */
+function urlExt(url: string): string | null {
+  const path = url.split(/[?#]/)[0].replace(/\/+$/, '')
+  const base = path.split('/').pop() || ''
+  const i = base.lastIndexOf('.')
+  return i >= 1 ? base.slice(i + 1).toLowerCase() : null
+}
+
+/**
+ * Classify `bestMediaUrl` into image/video/audio/file. Returns null when there
+ * is no URL OR the URL has no extension (e.g. invite links like
+ * `support.weixin.qq.com/.../addchatroombyinvite?ticket=...`) — those aren't
+ * media files and should fall through to text rendering.
+ */
+const mediaKind = computed<'image' | 'video' | 'audio' | 'file' | undefined>(() => {
+  const u = bestMediaUrl.value
+  if (!u) return undefined
+  const ext = urlExt(u)
+  if (!ext) return undefined
+  if (IMAGE_EXTS.has(ext)) return 'image'
+  if (VIDEO_EXTS.has(ext)) return 'video'
+  if (AUDIO_EXTS.has(ext)) return 'audio'
+  return 'file'
+})
+
+/**
+ * Image preview src list — prefer the highest-fidelity http URL available so
+ * click-to-zoom shows the best copy. Falls back to the displayed thumb URL.
+ */
+const imageFullUrl = computed<string | undefined>(() => {
+  const m = props.message
+  for (const u of [m.file_hd_url, m.file_url, m.file_th_url]) {
+    if (u && HTTP_RE.test(u)) return u
+  }
+  return undefined
+})
+
+/**
+ * Localized type tag for the unknown-fallback bubble and the drawer. WeChat
+ * uses `wechatTypeLabel(type_raw)`; WhatsApp type codes (0/1) are already
+ * covered by the structured `type` field and don't need a label map here.
+ */
+const typeTagLabel = computed(() => {
+  const m = props.message
+  if (m.channel === 'wechat') return wechatTypeLabel(m.type_raw)
+  return m.type || `未知${m.type_raw != null ? `(${m.type_raw})` : ''}`
+})
 </script>
 
 <template>
@@ -53,80 +125,102 @@ const imageThumbUrl = computed(
       {{ message.text || (message.type === 'divider' ? '—— 分割线 ——' : '系统消息') }}
     </div>
 
-    <!-- Normal bubble row — click opens the all-fields drawer. The image
-         preview + file download link stop propagation so their own clicks
-         (zoom / navigate) don't also open the drawer. -->
+    <!-- Normal bubble row — click opens the all-fields drawer. Interactive
+         children (image / video / audio / file link) stop propagation so
+         their own clicks don't also open the drawer. -->
     <div v-else class="yk-msg__row yk-msg__row--clickable" @click="emit('open-detail', message)">
       <div class="yk-msg__meta">
         <span>{{ senderLabel }}</span>
         <span v-if="timeLabel">{{ timeLabel }}</span>
       </div>
 
-      <!-- text -->
-      <div v-if="message.type === 'text'" class="yk-msg__bubble">
-        {{ message.text || '（空消息）' }}
-      </div>
-
-      <!-- image -->
-      <div v-else-if="message.type === 'image'" @click.stop>
+      <!-- 1a. image (http URL with image extension) -->
+      <div v-if="mediaKind === 'image'" @click.stop>
         <el-image
-          v-if="imageThumbUrl"
           class="yk-msg__image"
-          :src="imageThumbUrl"
+          :src="bestMediaUrl"
           :preview-src-list="imageFullUrl ? [imageFullUrl] : []"
           :preview-teleported="true"
           fit="cover"
           hide-on-click-modal
         />
-        <span v-else class="yk-msg__bubble">[图片]</span>
       </div>
 
-      <!-- video -->
-      <div v-else-if="message.type === 'video'">
+      <!-- 1b. video (http URL with video extension) -->
+      <div v-else-if="mediaKind === 'video'" @click.stop>
         <video
-          v-if="message.file_url"
           class="yk-msg__video"
-          :src="message.file_url"
+          :src="bestMediaUrl"
           controls
           preload="metadata"
         />
-        <span v-else class="yk-msg__bubble">
-          <el-icon><VideoPlay /></el-icon> [视频]
+      </div>
+
+      <!-- 1c. audio (http URL with audio extension) — native player + chip
+           showing the duration when the message carries one. -->
+      <div v-else-if="mediaKind === 'audio'" class="yk-msg__voice" @click.stop>
+        <audio class="yk-msg__audio" :src="bestMediaUrl" controls preload="metadata" />
+        <span v-if="message.duration" class="yk-msg__chip">
+          <el-icon><Microphone /></el-icon>
+          {{ formatDuration(message.duration) }}
         </span>
       </div>
 
-      <!-- voice -->
-      <div v-else-if="message.type === 'voice'" class="yk-msg__voice">
+      <!-- 1d. generic file (http URL, other extension) — download link -->
+      <div v-else-if="mediaKind === 'file'" @click.stop>
+        <a
+          class="yk-msg__chip yk-msg__chip--download"
+          :href="bestMediaUrl"
+          target="_blank"
+          rel="noopener"
+        >
+          <el-icon><Paperclip /></el-icon>
+          下载文件
+        </a>
+      </div>
+
+      <!-- 2. voice with duration but no URL (e.g. type 34 with opaque id) -->
+      <div v-else-if="message.duration" class="yk-msg__voice">
         <span class="yk-msg__chip">
           <el-icon><Microphone /></el-icon>
-          语音{{ message.duration ? ` (${formatDuration(message.duration)})` : '' }}
+          语音 ({{ formatDuration(message.duration) }})
         </span>
         <div v-if="message.transcription_text" class="yk-msg__transcript">
           {{ message.transcription_text }}
         </div>
       </div>
 
-      <!-- file -->
-      <div v-else-if="message.type === 'file'" @click.stop>
-        <a
-          v-if="message.file_url"
-          class="yk-msg__chip yk-msg__chip--download"
-          :href="message.file_url"
-          target="_blank"
-          rel="noopener"
-        >
-          <el-icon><Document /></el-icon>
-          下载文件
-        </a>
-        <span v-else class="yk-msg__bubble">
-          <el-icon><Document /></el-icon> [文件]
-        </span>
+      <!-- 3. transcription text only -->
+      <div v-else-if="message.transcription_text" class="yk-msg__bubble">
+        {{ message.transcription_text }}
       </div>
 
-      <!-- unknown / fallback -->
+      <!-- 4. plain text -->
+      <div v-else-if="message.text || message.type === 'text'" class="yk-msg__bubble">
+        {{ message.text || '（空消息）' }}
+      </div>
+
+      <!-- 5. structured-type placeholder fallback (e.g. WA image whose URL is
+           a mediaName filename, not an http URL — can't render without the
+           download endpoint, so degrade to a labeled placeholder). -->
+      <span v-else-if="message.type === 'image'" class="yk-msg__bubble">
+        <el-icon><Picture /></el-icon> [图片]
+      </span>
+      <span v-else-if="message.type === 'video'" class="yk-msg__bubble">
+        <el-icon><VideoPlay /></el-icon> [视频]
+      </span>
+      <span v-else-if="message.type === 'voice'" class="yk-msg__bubble">
+        <el-icon><Microphone /></el-icon> [语音]
+      </span>
+      <span v-else-if="message.type === 'file'" class="yk-msg__bubble">
+        <el-icon><Document /></el-icon> [文件]
+      </span>
+
+      <!-- 6. unknown fallback — show localized type tag instead of bare
+           "[未知消息]" so the user at least sees 图片/语音/名片/etc. -->
       <div v-else class="yk-msg__bubble">
-        <el-icon v-if="message.type === 'unknown'"><Picture /></el-icon>
-        {{ message.text || `[未知消息${message.type_raw != null ? ` (${message.type_raw})` : ''}]` }}
+        <el-icon><Picture /></el-icon>
+        [{{ typeTagLabel }}]
       </div>
     </div>
   </div>