polish(channel): compact header — stats inline, slimmer banner

- Move the channel stats (subscribers / videos / views / joined) onto one meta line beside the
  handle under the name, dropping the separate stats row.
- Cap the banner at 150px tall so it no longer dominates the page; the wide YouTube-style crop
  is kept. Net: the video grid starts much higher.

frontend/src/components/ChannelPage.tsx

@@ -123,6 +123,14 @@ export default function ChannelPage({
   const joined = ch?.published_at
     ? new Date(ch.published_at).toLocaleDateString(i18n.language, { year: "numeric", month: "short" })
     : null;
+  // Handle + stats on one compact meta line under the name (saves the separate stats row).
+  const metaParts = [
+    ch?.handle ? `@${ch.handle.replace(/^@/, "")}` : null,
+    ch?.subscriber_count != null ? t("channel.subscribers", { formatted: formatViews(ch.subscriber_count) }) : null,
+    ch?.video_count != null ? t("channel.videoCount", { count: ch.video_count }) : null,
+    ch?.total_view_count != null ? t("channel.totalViews", { formatted: formatViews(ch.total_view_count) }) : null,
+    joined ? t("channel.joined", { date: joined }) : null,
+  ].filter(Boolean) as string[];
   const tabClass = (active: boolean) =>
     active
       ? "pb-2 text-sm font-medium border-b-2 border-fg text-fg"
@@ -136,7 +144,10 @@ export default function ChannelPage({
           // Match YouTube's banner: the stored bannerExternalUrl is the full 16:9 template at a
           // low default size, so request a crisp wide version (=w1707) and object-cover the
           // desktop "safe area" — the centre 2560×423 (~6:1) band — at full width.
-          <div className="w-full overflow-hidden bg-surface" style={{ aspectRatio: "2560 / 423" }}>
+          <div
+            className="w-full overflow-hidden bg-surface"
+            style={{ aspectRatio: "2560 / 423", maxHeight: "150px" }}
+          >
             <img
               src={`${ch.banner_url}=w1707`}
               alt=""
@@ -173,9 +184,14 @@ export default function ChannelPage({
                 </span>
               )}
             </div>
-            {ch?.handle && (
+            <div className="text-sm text-muted mt-0.5 flex flex-wrap gap-x-1.5 gap-y-0.5">
-              <div className="text-sm text-muted truncate">@{ch.handle.replace(/^@/, "")}</div>
+              {metaParts.map((part, i) => (
-            )}
+                <span key={i}>
+                  {i > 0 && <span className="mr-1.5">·</span>}
+                  {part}
+                </span>
+              ))}
+            </div>
           </div>
           <div className="flex items-center gap-2 shrink-0 pb-1">
             <a
@@ -212,17 +228,6 @@ export default function ChannelPage({
           </div>
         </div>
 
-        {/* Stats */}
-        <div className="flex flex-wrap items-center gap-x-2.5 gap-y-1 text-sm text-muted mt-3">
-          {ch?.subscriber_count != null && (
-            <span>{t("channel.subscribers", { formatted: formatViews(ch.subscriber_count) })}</span>
-          )}
-          {ch?.video_count != null && <span>· {t("channel.videoCount", { count: ch.video_count })}</span>}
-          {ch?.total_view_count != null && (
-            <span>· {t("channel.totalViews", { formatted: formatViews(ch.total_view_count) })}</span>
-          )}
-          {joined && <span>· {t("channel.joined", { date: joined })}</span>}
-        </div>
         {exploring && (
           <div className="flex items-center gap-2 text-xs text-muted mt-2">
             <Loader2 className="w-3.5 h-3.5 animate-spin" />
@@ -231,7 +236,7 @@ export default function ChannelPage({
         )}
 
         {/* Tabs */}
-        <div className="flex items-center gap-4 mt-4 border-b border-border">
+        <div className="flex items-center gap-4 mt-3 border-b border-border">
           <button onClick={() => setTab("videos")} className={tabClass(tab === "videos")}>
             {t("channel.tabVideos")}
           </button>