diff --git a/ui/src/components/IssueChatThread.test.tsx b/ui/src/components/IssueChatThread.test.tsx
index 977d2bedbda..80ec83d7621 100644
--- a/ui/src/components/IssueChatThread.test.tsx
+++ b/ui/src/components/IssueChatThread.test.tsx
@@ -1785,6 +1785,35 @@ describe("IssueChatThread", () => {
     });
   });
 
+  it("does not render an empty placeholder when the empty message is blank", () => {
+    const root = createRoot(container);
+
+    act(() => {
+      root.render(
+        <MemoryRouter>
+          <IssueChatThread
+            comments={[]}
+            linkedRuns={[]}
+            timelineEvents={[]}
+            liveRuns={[]}
+            onAdd={async () => {}}
+            showComposer={false}
+            emptyMessage=""
+            enableLiveTranscriptPolling={false}
+          />
+        </MemoryRouter>,
+      );
+    });
+
+    expect(container.textContent).toContain("Jump to latest");
+    expect(container.textContent).not.toContain("This issue conversation is empty");
+    expect(container.querySelector(".border-dashed")).toBeNull();
+
+    act(() => {
+      root.unmount();
+    });
+  });
+
   it("shows non-image attachment upload state in the composer after a drop", async () => {
     const root = createRoot(container);
     const onAttachImage = vi.fn(async (file: File) => ({
diff --git a/ui/src/components/IssueChatThread.tsx b/ui/src/components/IssueChatThread.tsx
index 82e50fb3a4d..298d141468d 100644
--- a/ui/src/components/IssueChatThread.tsx
+++ b/ui/src/components/IssueChatThread.tsx
@@ -451,7 +451,7 @@ function IssueChatFallbackThread({
         </div>
       </div>
 
-      {messages.length === 0 ? (
+      {messages.length === 0 && emptyMessage.trim().length > 0 ? (
         <div className={cn(
           "text-center text-sm text-muted-foreground",
           variant === "embedded"
@@ -3632,6 +3632,7 @@ export function IssueChatThread({
     errorBoundaryResetVersionRef.current += 1;
   }
   const errorBoundaryResetKey = String(errorBoundaryResetVersionRef.current);
+  const shouldShowEmptyState = resolvedEmptyMessage.trim().length > 0;
 
   return (
     <AssistantRuntimeProvider runtime={runtime}>
@@ -3660,7 +3661,7 @@ export function IssueChatThread({
               data-testid="thread-viewport"
               className={variant === "embedded" ? "space-y-3" : "space-y-4"}
             >
-              {messages.length === 0 ? (
+              {messages.length === 0 && shouldShowEmptyState ? (
                 <div className={cn(
                   "text-center text-sm text-muted-foreground",
                   variant === "embedded"
diff --git a/ui/src/lib/company-routes.test.ts b/ui/src/lib/company-routes.test.ts
index d6dc2668378..abafbfe8b26 100644
--- a/ui/src/lib/company-routes.test.ts
+++ b/ui/src/lib/company-routes.test.ts
@@ -20,4 +20,11 @@ describe("company routes", () => {
       "/execution-workspaces/workspace-123",
     );
   });
+
+  it("treats conference room paths as board routes that need a company prefix", () => {
+    expect(isBoardPathWithoutPrefix("/conference/history")).toBe(true);
+    expect(extractCompanyPrefixFromPath("/conference/history")).toBeNull();
+    expect(applyCompanyPrefix("/conference/history", "PAP")).toBe("/PAP/conference/history");
+    expect(applyCompanyPrefix("/conference/PAP-1551", "PAP")).toBe("/PAP/conference/PAP-1551");
+  });
 });
diff --git a/ui/src/lib/company-routes.ts b/ui/src/lib/company-routes.ts
index 04659a61a3a..9164222a836 100644
--- a/ui/src/lib/company-routes.ts
+++ b/ui/src/lib/company-routes.ts
@@ -17,6 +17,7 @@ const BOARD_ROUTE_ROOTS = new Set([
   "activity",
   "inbox",
   "u",
+  "conference",
   "design-guide",
 ]);
 
diff --git a/ui/src/pages/ConferenceRoom.tsx b/ui/src/pages/ConferenceRoom.tsx
index 435861c0df2..d34bcdebfdd 100644
--- a/ui/src/pages/ConferenceRoom.tsx
+++ b/ui/src/pages/ConferenceRoom.tsx
@@ -313,7 +313,7 @@ export function ConferenceRoom() {
 
   return (
     <TooltipProvider>
-      <div className="mx-auto flex h-[calc(100vh-8.5rem)] min-h-[560px] max-w-5xl flex-col overflow-hidden">
+      <div className="flex h-[calc(100vh-8.5rem)] min-h-[560px] w-full max-w-5xl flex-col overflow-hidden">
         <div className="mb-3 flex h-11 shrink-0 items-center justify-between border-b border-border/80 bg-background">
           <div className="flex min-w-0 items-center gap-2">
             <span className="flex h-8 w-8 items-center justify-center rounded-md border border-border bg-muted/60">