Redesign the native lock screen: clock/avatar header, on-screen keyboard, wrong-password shake

The native lock UI was a flat bordered rectangle with three left-aligned
text lines and no shadow, clock, or identity marker - reported directly
as looking unfinished. Splits the redesign across a new transparent-canvas
header (time, date, circular avatar, username) above a redesigned,
centered password box with a real drop shadow and a dimmed placeholder
prompt, plus a genuine on-screen QWERTY-shaped keyboard with working
Shift/Backspace/Return/Space and real click hit-testing shared with the
render path via one `lock_stack_layout` function, and a damped-sine shake
on a failed attempt.

LockConfig gains show_clock/show_keyboard/avatar_bg, each independently
srd.set-able and documented in a new theme.lock.* section in DEFAULTS.md.
native_lock_render_elements now takes one NativeLockFrame struct instead
of positional buffer arguments now that it composites five optional
layers instead of two.

Full workspace build/test/clippy clean (152 wayland tests, +6 new).

1 files changed, 9 insertions, 2 deletions

diff --git a/crates/wayland/src/input/pointer.rs b/crates/wayland/src/input/pointer.rs
index 44b0bd7..2ecc15c 100644
--- a/crates/wayland/src/input/pointer.rs
+++ b/crates/wayland/src/input/pointer.rs
@@ -485,9 +485,16 @@ pub(crate) fn handle_pointer_button(state: &mut CompState, pos: Point<f64, Logic
     const BTN_MIDDLE: u32 = 0x112;
     let serial = SERIAL_COUNTER.next_serial();
 
-    // Locked: forward the click to the lock surface (it may have a button or
-    // a text field) but never let it focus, raise, drag, or close a window.
+    // Locked: srdwm's own native lock UI has no real `wl_surface` to
+    // dispatch a pointer event to - its on-screen keyboard is hit-tested
+    // directly instead, on a left-button press, before falling through to
+    // the generic forward-to-lock-surface path below (which still applies
+    // for an external `LockSurface`-based locker, or a native lock with
+    // the keyboard hidden/absent).
     if state.lock.locked {
+        if pressed && button == BTN_LEFT && state.lock.native.is_some() && state.native_lock_click(pos) {
+            return;
+        }
         if let Some(pointer) = state.seat.get_pointer() {
             let button_state = if pressed { BackendButtonState::Pressed } else { BackendButtonState::Released };
             pointer.button(state, &ButtonEvent { serial, time, button, state: button_state });