Auto-threading, history pagination, streaming toggle + tool/reasoning display settings

- Auto-threading (Telegram topic-mode workflow): message.send {auto_thread}
  mints a fresh AI-named thread (instant derived title, LLM upgrade via
  channel.renamed); channel.created {auto:true}; the app jumps into the new
  thread and relocates the optimistic pending bubble.
- history frame: paged full message history for initial channel open /
  scroll-up pagination (reconstructed from the outbox log).
- Streaming on/off: gateway side (display.platforms.android.streaming) plus a
  per-device app toggle (Settings → Streaming); reasoning/model/tokens carried
  on message frames.
- Context menu: long-press (touch) / right-click (desktop) thread affordances
  via a KMP rightClick expect/actual.
- Settings → Reasoning: auto-collapse long reasoning blocks (default on).
- Tool detail: the gateway now always supplies full tool data — it forces
  verbose tool progress (full args → tool.start.args) and captures each
  completed call via the post_tool_call hook (output/duration/ok → tool.end).
  The app reveals the full call + output on expand (Truncated) and
  auto-expands cards in Everything mode.

docs/13-testing.md

@@ -32,6 +32,11 @@ without the app (critical for verifying frame shapes early).
   - **Push backend selection:** fcm vs ntfy chosen by config; `configured()`
     reflects missing creds.
   - **Channel directory:** create/rename/set_default; cron target resolution.
+  - **Auto-threading:** `message.send {auto_thread:true}` in a flat lane mints a
+    thread (derived name, `channel.created {auto:true}`) and the echo/event
+    carry the new `thread_id`; no-op with an existing `thread_id`, for slash
+    commands, or for media-only sends; the LLM upgrade renames the thread
+    (`channel.renamed`).
 - **No `~/.hermes` writes in tests** — use the `_isolate_hermes_home` fixture
   pattern (temp `HERMES_HOME`). Profile tests also mock `Path.home()`.
 
@@ -113,6 +118,10 @@ adb logcat -d > /tmp/logcat.txt
     trigger a message → FCM notification appears → tap → syncs + deep-links.
 12. **Reconnect/sync:** kill the WS (stop gateway briefly) → restart → app
     reconnects → `sync` catches up (no lost/dup messages).
+13. **Auto-threading:** Threads on → send a message in the Default channel's
+    flat lane → a new topic appears (derived name), the app jumps into it, the
+    reply streams there, and the topic is renamed to the AI's title a moment
+    later. Slash commands / media-only sends stay in the flat lane.
 
 ## 13.5 Debugging tips