Add docker publish flow, node blocklist & API updates

Replace docker/metadata GH Action with a docker-publish.sh driven workflow (supports auto-versioning, extra tags, multi-arch builds and optional builder). Update docs and READMEs to use the updater and new publish flow. Add server-side swarm/node blocklist support and admin nodes API. Improve auth endpoints (me, logout, switch, session accounts) and support account switching. Extend bots API to support custom LLM provider and optional endpoint. Enforce node blocklist on chat send/receive, refactor link preview handling into dedicated preview modules, and enhance notifications and posts like/repost handlers to accept both signed actions and regular auth flows. Misc: remove admin update UI details, add helper libs (media previews, node-blocklist, reposts, notifications, etc.), and minor housekeeping (pyc, workflow tweaks).

src/components/Compose.tsx

@@ -36,6 +36,13 @@ export function Compose({ onPost, replyingTo, onCancelReply, placeholder = "What
     const [isNsfwNode, setIsNsfwNode] = useState(false);
     const maxLength = 600;
     const remaining = maxLength - content.length;
+    const previewMedia = linkPreview?.media?.length
+        ? linkPreview.media
+        : linkPreview?.image
+            ? [{ url: linkPreview.image }]
+            : [];
+    const previewImage = previewMedia[0]?.url || linkPreview?.image || null;
+    const isEmbeddedVideo = Boolean(linkPreview?.url?.match(/(youtube\.com|youtu\.be|vimeo\.com)/));
 
     // Check if user can post NSFW content and if node is NSFW
     useEffect(() => {
@@ -210,11 +217,32 @@ export function Compose({ onPost, replyingTo, onCancelReply, placeholder = "What
                         x
                     </button>
                     <VideoEmbed url={linkPreview.url} />
-                    {!linkPreview.url.match(/(youtube\.com|youtu\.be|vimeo\.com)/) && (
+                    {!isEmbeddedVideo && (
                         <div className="link-preview-card mini">
-                            {linkPreview.image && (
+                            {linkPreview.type === 'video' && linkPreview.videoUrl ? (
                                 <div className="link-preview-image">
-                                    <img src={linkPreview.image} alt="" />
+                                    <video
+                                        src={linkPreview.videoUrl}
+                                        poster={previewImage || undefined}
+                                        muted
+                                        playsInline
+                                        preload="metadata"
+                                    />
+                                </div>
+                            ) : linkPreview.type === 'gallery' && previewMedia.length > 0 ? (
+                                <div className="link-preview-gallery compact">
+                                    {previewMedia.slice(0, 3).map((item: { url: string }, index: number) => (
+                                        <div className="link-preview-gallery-item" key={`${item.url}-${index}`}>
+                                            <img src={item.url} alt="" />
+                                            {index === Math.min(previewMedia.length, 3) - 1 && previewMedia.length > 3 && (
+                                                <span className="link-preview-gallery-more">+{previewMedia.length - 3}</span>
+                                            )}
+                                        </div>
+                                    ))}
+                                </div>
+                            ) : previewImage && (
+                                <div className="link-preview-image">
+                                    <img src={previewImage} alt="" />
                                 </div>
                             )}
                             <div className="link-preview-info">