Studio: fix permission composer layout and Hub feed icons (#7148)

* Expand composer for permission modes

* Filter default Hub feed by provider logo

studio/frontend/src/components/assistant-ui/thread.tsx

@@ -1433,7 +1433,6 @@ const Composer: FC<{
   const mcpEnabledForChat = useChatRuntimeStore((s) => s.mcpEnabledForChat);
   const ragEnabled = useChatRuntimeStore((s) => s.ragEnabled);
   const permissionMode = useChatRuntimeStore((s) => s.permissionMode);
-  const bypassPermissions = useChatRuntimeStore((s) => s.bypassPermissions);
   // More than 4 pills: collapse to icons only. Search and Code always show; the
   // permission pill shows in every mode except "off" (it renders null there);
   // Images, RAG, Canvas and MCP are conditional.
@@ -1557,8 +1556,7 @@ const Composer: FC<{
   }, [composerText, draftKey]);
   // Two-row layout shows once the input wraps or a tool is on. Tools can
   // pre-select before a model loads, so an active toggle expands it either way.
-  // Bypass permissions counts too: turning it on should drop the composer into
-  // the two-row layout immediately, same as Search/Code.
+  // Keep the composer expanded whenever the permission pill is visible.
   const composerExpanded =
     isMultiline ||
     hasAttachments ||
@@ -1569,7 +1567,7 @@ const Composer: FC<{
     ragEnabled ||
     artifactsEnabled ||
     mcpEnabledForChat ||
-    bypassPermissions;
+    permissionMode !== "off";
   // react-textarea-autosize re-measures only on value change or window resize,
   // not on the width swap from expanding, so it keeps the taller height and
   // leaves a stray blank row. Nudge a resize whenever input width changes.

studio/frontend/src/features/hub/hub-page.tsx

@@ -75,6 +75,7 @@ import {
 } from "./lib/channels";
 import { isHiddenModelId } from "./lib/hidden-models";
 import { inventoryRowMatches, tokenizeQuery } from "./lib/inventory-search";
+import { resolveOwnerProviderLogo } from "./lib/provider-logos";
 import {
   buildDiscoverRows,
   detectResultFormat,
@@ -699,6 +700,9 @@ export function ModelsPage() {
     return discoverRows.filter(
       (row) =>
         !isHiddenModelId(row.id) &&
+        // The default feed only shows models with a provider logo.
+        (!isFeedMode ||
+          resolveOwnerProviderLogo(row.owner, row.repo) !== null) &&
         matchesFormat(detectResultFormat(row.result), effectiveDiscoverFormat) &&
         matchesCapability(row.capabilities, deferredCapabilityFilter) &&
         (!activeChannel?.finetunableOnly || isUnslothFinetunable(row.result)) &&
@@ -711,6 +715,7 @@ export function ModelsPage() {
   }, [
     discoverRows,
     isDatasetMode,
+    isFeedMode,
     effectiveDiscoverFormat,
     deferredCapabilityFilter,
     activeChannel,