v.0.76.0

Added

• A page that lists what the device can do: each feature with its state (On,
  Off), a button to its settings or panel, and a link to its docs. It comes
  once after the first-run question, once on a device updated from an older
  version, and again after an update that adds a feature, with that one marked
  New. Settings, System opens it any time. Settings opened from it scroll to
  the right group and have a button back. It also says when a feature's
  buttons are hidden in the console. At the bottom there is a link to GitHub
  Discussions, for something missing.
• Keyboard shortcuts for the console: F for full screen, I, M, A and R for the
  panels, and ? for a list of them, with how to send Esc, Ctrl+Alt+Del and the
  Windows key.
• A box under Paste text to type text into, for when the browser will not
  read the clipboard. A long paste shows its progress and can be stopped.
• On a phone, a long press on a button in a bar shows what it is.
• The browser tab has the device's name, and says "No signal" or "Unreachable"
  in front.
• A view-only sign-in: user viewer with its own password, set in Settings,
  Security. It sees the picture, the sound and the recordings, and cannot
  type, click, touch the power or change a setting. The device enforces it.
• The status bar shows how many other consoles are open. A click lists their
  addresses, who is in control and who only watches.
• The dot next to Online pulses while frames arrive, and turns amber when the
  device sends frames that stop reaching the tab.
• "Show the keys sent" (Settings, UI): the last keys that went to the target,
  in the bottom bar.
• Your own cursor over the picture can be a small dot, or hidden (Settings,
  Input, Pointer).
• Scroll speed (Settings, Input, Pointer), for the wheel and the touchpad.
• "Find this screen" now also fixes a target that puts black borders round a
  smaller desktop, such as 4:3 in a 16:9 mode. Clicks used to land short of
  the pointer there.
• The target's HDD LED can be wired like the power LED (atx_hdd_gpio). The
  power button on the rail then blinks while the disk works.

Changed

• The device count from the update check now includes the chip revision
  (3.1, 1.3), so I can see which silicon is out there. The firmware reports it
  in /api/v1/system/info as chipRev.
• The Waveshare ESP32-P4-Module-DEV-KIT is marked tested now. Someone runs
  the rev 3.x image on one.

Fixed

• Scrolling with a touchpad often did nothing, and so did a mouse wheel in a
  browser that reports small steps, like Firefox. Small steps now add up, and
  every notch of a wheel is at least one click on the target.
• MJPEG on rev 3.x boards was washed out: black came out dark grey, white a
  little dim. The HDMI bridge sent black as 16 and white as 235, and a browser
  reads a JPEG as 0 to 255. It sends the full range now, and H.264 says in its
  stream which range it uses.