feat(webui): render image attachments inline

src/gateway/http.rs

@@ -307,6 +307,9 @@ fn inline_mime_allowed(mime: &str) -> bool {
             | "image/jpeg"
             | "image/gif"
             | "image/webp"
+            | "image/bmp"
+            | "image/avif"
+            | "image/x-icon"
             | "audio/mpeg"
             | "audio/ogg"
             | "audio/wav"
@@ -724,6 +727,7 @@ mod tests {
             "%E6%8A%A5%E5%91%8A%201.pdf"
         );
         assert!(inline_mime_allowed("image/png"));
+        assert!(inline_mime_allowed("image/bmp"));
         assert!(!inline_mime_allowed("image/svg+xml"));
         assert!(!inline_mime_allowed("text/html"));
     }

webui/src/pages/ChatPage.svelte

@@ -250,7 +250,7 @@
   }
 
   function canPreview(attachment) {
-    return ["image/png", "image/jpeg", "image/gif", "image/webp"].includes(attachment.mime_type);
+    return ["image/png", "image/jpeg", "image/gif", "image/webp", "image/bmp", "image/avif", "image/x-icon"].includes(attachment.mime_type);
   }
 
   function addFiles(files) {
@@ -439,13 +439,20 @@
               {#if message.attachments?.length}
                 <div class="message-attachments">
                   {#each message.attachments as attachment (`${message.id}:${attachment.index}`)}
-                    <article class="attachment-card">
                     {#if canPreview(attachment)}
-                        <img src={attachmentUrl(message, attachment, true)} alt={attachment.name} />
+                      <article class="image-attachment">
-                      {:else}<span class="attachment-icon">▧</span>{/if}
+                        <a class="image-preview-link" href={attachmentUrl(message, attachment)} target="_blank" rel="noreferrer" aria-label={`查看原图 ${attachment.name}`}>
+                          <img class="image-preview" src={attachmentUrl(message, attachment, true)} alt={attachment.name} />
+                        </a>
+                        <div class="attachment-meta"><div><strong>{attachment.name}</strong><small>{attachment.mime_type || attachment.media_type}</small></div><a href={attachmentUrl(message, attachment)} download={attachment.name} aria-label={`下载 ${attachment.name}`}>↓</a></div>
+                      </article>
+                    {:else}
+                      <article class="attachment-card">
+                        <span class="attachment-icon">▧</span>
                         <div><strong>{attachment.name}</strong><small>{attachment.mime_type || attachment.media_type}</small></div>
                         <a href={attachmentUrl(message, attachment)} download={attachment.name} aria-label={`下载 ${attachment.name}`}>↓</a>
                       </article>
+                    {/if}
                   {/each}
                 </div>
               {/if}

webui/src/styles.css

@@ -145,10 +145,17 @@ main { min-width: 0; height: 100vh; display: flex; flex-direction: column; }
 .message.user .bubble { background: var(--user-bubble); border-color: var(--accent-border); }
 .message-attachments { display: grid; gap: 7px; width: min(100%, 520px); }
 .attachment-card { display: grid; grid-template-columns: 42px minmax(0, 1fr) 30px; gap: 9px; align-items: center; padding: 8px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
-.attachment-card img, .attachment-icon { width: 42px; height: 42px; border-radius: 7px; object-fit: cover; background: var(--panel-2); display: grid; place-items: center; color: var(--accent); }
+.attachment-icon { width: 42px; height: 42px; border-radius: 7px; background: var(--panel-2); display: grid; place-items: center; color: var(--accent); }
 .attachment-card strong, .attachment-card small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
 .attachment-card strong { font-size: 12px; }.attachment-card small { margin-top: 3px; color: var(--muted); font-size: 9px; }
 .attachment-card a { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 7px; color: var(--accent); text-decoration: none; }
+.image-attachment { width: min(100%, 680px); overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
+.image-preview-link { display: grid; max-height: 520px; overflow: hidden; place-items: center; background: var(--panel-2); }
+.image-preview { display: block; max-width: 100%; max-height: 520px; object-fit: contain; }
+.attachment-meta { display: grid; grid-template-columns: minmax(0, 1fr) 30px; gap: 9px; align-items: center; padding: 8px 10px; }
+.attachment-meta strong, .attachment-meta small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.attachment-meta strong { font-size: 12px; }.attachment-meta small { margin-top: 3px; color: var(--muted); font-size: 9px; }
+.attachment-meta > a { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 7px; color: var(--accent); text-decoration: none; }
 .typing .bubble { color: var(--muted); }
 .active-turn .message-content { width: min(82%, 760px); }
 .streaming { border-color: var(--accent-border); }