docs: add ASCII screen mockups to README feature sections

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -10,9 +10,52 @@ Join the discussion on offical MeshCore discord: https://discord.gg/sdhYArU2jr
 
 View and send messages using the on-screen keyboard or predefined quick replies. The keyboard supports placeholders that insert live sensor data — `{time}` and `{loc}` are always available; additional placeholders (`{temp}`, `{hum}`, `{pres}`, `{batt}`, `{alt}`, `{lux}`, `{co2}`) appear automatically for sensors that are connected and returning data.
 
+Each message in the history list shows the sender name and a compact age indicator (`3m`, `2h`, `>1d`) in the top-right corner of the entry.
+
+```
+╔══════════════════════════════╗
+║          #general            ║
+╠══════════════════════════════╣
+║▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓║  ← selected
+║ Alice                   3m  ║
+║ Hey, let's meet tomorrow    ║
+║┌───────────────────────────┐║
+║│▓▓▓▓▓▓▓▓▓ Bob      1h ▓▓▓▓│║
+║│ Sure, what time works?    │║
+║└───────────────────────────┘║
+║[+ send]                     ║
+╚══════════════════════════════╝
+```
+
 Press Enter on a message to open it in fullscreen. Navigate between messages with left (newer) and right (older). If the message is a reply addressed to someone (`@[nick]`), a **To: nick** bar is shown below the sender name and the body is displayed without the address prefix.
 
-Hold Enter on a message to open a context menu. From the list or fullscreen view, select **Reply** to pre-fill the keyboard or a quick message with `@[nick]` so the recipient is clearly addressed. On channel or contact list entries, the context menu also lets you change per-channel notification settings (mute, follow global, or force-on), per-channel melody override (follow global, Melody 1, or Melody 2), or mark messages as read.
+```
+╔══════════════════════════════╗
+║▓▓ Alice ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓║  ← sender
+║▓▓ To: Bob ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓║  ← recipient
+╠══════════════════════════════╣
+║ Hey Bob, let's meet up       ║
+║ tomorrow at 6pm downtown.    ║
+║ Will you make it?            ║
+║                              ║
+║< newer                older >║
+╚══════════════════════════════╝
+```
+
+Hold Enter on a message to open a context menu. From the list or fullscreen view, select **Reply** to pre-fill the keyboard or a quick message with `@[nick]` so the recipient is clearly addressed. The reply picker title shows the recipient's name.
+
+```
+╔══════════════════════════════╗
+║           RE:Alice           ║
+╠══════════════════════════════╣
+║> Custom message...           ║
+║  OK, I understand            ║
+║  On my way                   ║
+║  Be right there              ║
+╚══════════════════════════════╝
+```
+
+On channel or contact list entries, the context menu also lets you change per-channel notification settings (mute, follow global, or force-on), per-channel melody override (follow global, Melody 1, or Melody 2), or mark messages as read.
 
 ### Settings Screen
 
@@ -62,6 +105,19 @@ Hold **Back** and press **Enter** three times to lock or unlock the device. Whil
 
 Browse nodes that have recently advertised on the mesh. Filter by category (Favourites, All, Companion, Repeater, Room, Sensor). Select a node to see its coordinates, distance, bearing with cardinal direction, type, and last-heard time.
 
+```
+╔══════════════════════════════╗
+║▓▓▓▓▓ WioTracker-Alice ▓▓▓▓▓▓║  ← node name
+╠══════════════════════════════╣
+║ Lat: 50.06190                ║
+║ Lon: 19.94090                ║
+║ Dist: 2.3km                  ║
+║ Az: 145d (SE)                ║
+║ Type: Companion              ║
+║ Seen: 5m ago                 ║
+╚══════════════════════════════╝
+```
+
 Use **Send my advert** (hold Enter → context menu) to broadcast your position and prompt nearby nodes to respond with theirs.
 
 ### Tools Screen