Add QR pairing (terminal QR, in-app scanner, iris://pair deep link)

docs/05-streaming.md

@@ -28,7 +28,7 @@ finalize (attach reasoning/model/tokens footer, stop the cursor). Auto-scroll
 while the user is at the bottom.
 
 **Streaming on/off.** Two levels:
-- **Gateway side:** hermes `display.platforms.android.streaming` (default
+- **Gateway side:** hermes `display.platforms.iris.streaming` (default
   follows global). When off, the app just gets one final `message` frame.
 - **App side (per device):** Settings → "Streaming" toggle (default on). When
   off, the app ignores `message.start`/`message.update` frames and
@@ -49,11 +49,11 @@ chosen by `reasoning_style` (`gateway/display_config.py:37`):
 - `blockquote`: `> 💭 **Reasoning:**\n> …\n\n<response>`
 - `subtext`: `-# 💭 Reasoning\n-# …\n\n<response>` (Discord-style)
 
-**Plugin config.** Set for the `android` platform:
+**Plugin config.** Set for the `iris` platform:
 ```yaml
 display:
   platforms:
-    android:
+    iris:
       show_reasoning: true
       reasoning_style: code     # we split on the code-fence form
 ```