From 51646e84054f9e2c45ab9568d41607257abc1100 Mon Sep 17 00:00:00 2001
From: Ben Vinegar <ben@benv.ca>
Date: Sat, 4 Jul 2026 03:14:57 -0400
Subject: [PATCH] feat(viewer): disable the stream/timeline view toggle

Remove the Stream/Timeline switch from the session header so sessions
always render as the stream. The timeline view is kept but unreachable:
SessionTimeline, the viewMode state, and trace-step fetching are all
untouched, and viewMode stays "stream" so the timeline branch is never
taken. The ViewToggle component is commented out (not deleted) for an
easy revert, and the unused setViewMode import is dropped.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
---
 viewer/src/App.tsx | 52 ++++++++++++++++++++++++++--------------------
 1 file changed, 30 insertions(+), 22 deletions(-)

diff --git a/viewer/src/App.tsx b/viewer/src/App.tsx
index cb8cc7f..8627203 100644
--- a/viewer/src/App.tsx
+++ b/viewer/src/App.tsx
@@ -46,7 +46,6 @@ import {
   setNavOpen,
   setPillTarget,
   setUnread,
-  setViewMode,
   standalonePost,
   streamLoading,
   posts,
@@ -583,7 +582,9 @@ function SessionView() {
           {current() ? `${current()!.agent} · started ${relTime(current()!.createdAt)}` : ""}
         </span>
         <span class="head-sp"></span>
-        <ViewToggle />
+        {/* Stream/timeline view toggle disabled for now — the timeline view
+            (SessionTimeline + ViewToggle below) is kept but unreachable; viewMode
+            stays "stream". Re-enable by restoring <ViewToggle /> here. */}
         {/* Host-overridable region (SLOTS.sessionActions): session-scoped controls
             an embedder projects beside the toggle (e.g. cloud "Share"). Empty
             fallback — self-hosted renders nothing here. */}
@@ -613,26 +614,33 @@ function SessionView() {
 
 // Stream ↔ timeline switch in the session head. Timeline is treatment E — the
 // session's posts on a center spine with the trace steps between them.
-function ViewToggle() {
-  return (
-    <div class="view-toggle" role="group" aria-label="View mode">
-      <button
-        classList={{ on: viewMode() === "stream" }}
-        aria-pressed={viewMode() === "stream"}
-        onClick={() => setViewMode("stream")}
-      >
-        Stream
-      </button>
-      <button
-        classList={{ on: viewMode() === "timeline" }}
-        aria-pressed={viewMode() === "timeline"}
-        onClick={() => setViewMode("timeline")}
-      >
-        Timeline
-      </button>
-    </div>
-  );
-}
+//
+// Disabled for now: the toggle is not rendered (see SessionView) so viewMode
+// stays "stream" and the timeline view is unreachable. The component is kept
+// commented rather than deleted so it can be restored. Re-enable by uncommenting
+// this and the <ViewToggle /> render, and re-adding `setViewMode` to the
+// ./state.ts import.
+//
+// function ViewToggle() {
+//   return (
+//     <div class="view-toggle" role="group" aria-label="View mode">
+//       <button
+//         classList={{ on: viewMode() === "stream" }}
+//         aria-pressed={viewMode() === "stream"}
+//         onClick={() => setViewMode("stream")}
+//       >
+//         Stream
+//       </button>
+//       <button
+//         classList={{ on: viewMode() === "timeline" }}
+//         aria-pressed={viewMode() === "timeline"}
+//         onClick={() => setViewMode("timeline")}
+//       >
+//         Timeline
+//       </button>
+//     </div>
+//   );
+// }
 
 function SessionTitle(props: { current: SessionRow | undefined }) {
   let el!: HTMLSpanElement;