feat(l2): Gallery app (screenshots as thumbnails, full view with swipe and delete, the saved trails), the clock from NTP while WiFi is up (the router's server from DHCP first), tabs switch on release, Home apps out of Settings

- Gallery: thumbnails 30 to a page, built only while the screen is still (a decode held the loop and a scroll read as a tap)
- segmented(): CLICK_TRIG, so a swipe starting on a screen's tabs doesn't switch them
- Settings > Device > Home apps removed (hold an app on Home instead)
- platformio.ini: a note that the L2 has no microphone on GPIO15 (verified on hardware)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/solo/settings.md

@@ -99,10 +99,9 @@ if your mesh agrees on it.
 > **Wio Tracker L2:** one list of pages:
 >
 > - **Device**: Display (including the lock, **Tap to wake**, the **Theme**,
->   dark or light, which restarts the device, and the accent colour), Home apps,
->   Power (battery, GPS, and the **Battery curve** as a chart whose points you
->   drag), Sound (with the melody editor), Keyboard, Messages
->   & contacts.
+>   dark or light, which restarts the device, and the accent colour), Power
+>   (battery, GPS, and the **Battery curve** as a chart whose points you
+>   drag), Sound (with the melody editor), Keyboard, Messages & contacts.
 > - **Connections**: Radio (with **Advanced** at the bottom), Privacy,
 >   Bluetooth, WiFi, GPS. Adding contacts is in Messages & contacts.
 > - **Map & data**: Map (trail, live sharing and arrival alert options),

docs/solo/tools.md

@@ -8,9 +8,9 @@ home page.
 
 > [!NOTE]
 > **Wio Tracker L2:** the tools are apps on the home screen: Messages, Nodes,
-> Settings, Compass, Clock, GPS, Bot, Repeater, Admin, Diagnostics, Flashlight. The trail,
-> live sharing and the locator are on the map (its tools button) and in
-> Settings › Map.
+> Settings, Compass, Clock, GPS, Bot, Repeater, Admin, Diagnostics, Flashlight,
+> Gallery. The trail, live sharing and the locator are on the map (its tools
+> button) and in Settings › Map.
 
 ## Clock
 
@@ -18,7 +18,8 @@ The **Clock** home page shows the time with a bar under it that fills with
 the seconds (Settings › Display › Clock seconds), the date, and up to three
 fields you choose (hold Enter): battery, temperature, humidity, pressure, altitude
 (barometric or GPS), light, CO₂, GPS position, satellites, contacts, unread
-messages. The time comes from GPS or the phone app; the time zone and summer
+messages. The time comes from GPS or the phone app (on the Wio Tracker L2
+also from the internet whenever WiFi is connected); the time zone and summer
 time are in Settings.
 
 **Enter** on the clock opens the clock tools:
@@ -108,6 +109,15 @@ when you leave. Not on e-ink, which gives no light.
 > **Wio Tracker L2:** the Flashlight app. A tap, the side button or the top
 > button puts it away.
 
+## Gallery
+
+> [!NOTE]
+> **Wio Tracker L2 only.** Two tabs. **Screenshots** shows the ones on the SD
+> card (side + top button takes one), newest first, as thumbnails, 30 to a
+> page. Tap one to see it on the whole screen: swipe for the next or the
+> previous, tap for its name, **Delete** and close. **Trails** lists the saved
+> trails; tap one to open it on the map with Load, GPX and Delete.
+
 ## Status
 
 The **Status** home page sums up the radio, GPS, battery and mesh in four