docs: move all bubble states into a collapsed section

CHANGELOG.md

@@ -8,6 +8,11 @@ _2026-09-28_
 
 Welcome to face-unlock `v2.1.0`! It now gets out of the way during video calls: when another app uses the camera, you type your password right away. sudo and admin prompts take your face from the start.
 
+<p align="center">
+  <img height="320" alt="The bubble over the lock screen with a crossed-out camera and the words Camera in use" src="https://raw.githubusercontent.com/LoonixTools/face-unlock/70ea1437eee61f10ca1f509faa6534f9b6b6a6f5/res/screenshots/camera-busy.png">
+  <img height="320" alt="The settings in Konsole with the new rows In SSH sessions and Quiet while the camera is in use" src="https://raw.githubusercontent.com/LoonixTools/face-unlock/v2.1.0/res/screenshots/settings.png">
+</p>
+
 ### Highlights
 
 - A crossed-out camera when another app uses it

CLAUDE.md

@@ -78,6 +78,12 @@ when you press Enter." The list of commits follows on its own.
 - To change an old release: edit its entry, commit, then
   `gh release edit <tag> --title <tag> --notes "$(.github/release-notes.sh <tag>)"`.
 
+## README
+
+- New UI (a window, a screen, a menu, a setting, a notification) gets a screenshot in the README,
+  next to the text about it. Like for releases: a real screenshot of it running, in English.
+- When a screen changes, take its screenshot again. The README never shows an old one.
+
 ## Testing
 
 Never test against the real setup: enrolling and the PAM files belong to the user's machine.

README.md

@@ -113,6 +113,19 @@ Press **1** and look at the camera. Then lock the screen and look at it.
 
 </details>
 
+<details>
+<summary>All bubble states</summary>
+
+<p align="center">
+  <img src="res/screenshots/bubble-states.png" alt="The bubble above the Plasma lock screen: looking, recognised, not recognised, and a crossed-out camera while another app uses the camera" width="900">
+</p>
+
+<p align="center">
+  <img src="res/screenshots/pill.png" alt="The small pill style of the bubble: the same four states" width="900">
+</p>
+
+</details>
+
 ## Is it safe?
 
 It is a convenience upgrade, not extra security. Your webcam only sees a flat picture, so