Shrink lock screen password dots to fit the field

Long passwords used to overflow the input field and clip with no
feedback that typing was still registering. Scale the dot size and
letter spacing down as the password grows, like macOS, so every
keystroke stays visible.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/shell.d/lock-password-overflow-test.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+TMPDIR=""
+QS_PID=""
+
+cleanup() {
+  if [[ -n $QS_PID ]] && kill -0 "$QS_PID" 2>/dev/null; then
+    kill "$QS_PID" 2>/dev/null || true
+    wait "$QS_PID" 2>/dev/null || true
+  fi
+  [[ -n $TMPDIR && -d $TMPDIR ]] && rm -rf "$TMPDIR"
+}
+trap cleanup EXIT
+
+if [[ -z ${WAYLAND_DISPLAY:-} ]]; then
+  pass "no Wayland compositor; skipping lock password overflow test"
+  exit 0
+fi
+
+if ! command -v quickshell >/dev/null 2>&1; then
+  pass "quickshell not installed; skipping lock password overflow test"
+  exit 0
+fi
+
+require_command jq
+
+TMPDIR=$(mktemp -d)
+result="$TMPDIR/result.json"
+log="$TMPDIR/quickshell.log"
+config_dir="$TMPDIR/lock-password-overflow"
+mkdir -p "$config_dir" "$TMPDIR/home"
+cp "$SHELL_TEST_DIR/fixtures/lock-password-overflow/shell.qml" "$config_dir/shell.qml"
+ln -s "$ROOT/shell/Ui" "$config_dir/Ui"
+ln -s "$ROOT/shell/Commons" "$config_dir/Commons"
+
+OMARCHY_PATH="$ROOT" \
+OMARCHY_QML_TEST_RESULT="$result" \
+HOME="$TMPDIR/home" \
+QML2_IMPORT_PATH="$ROOT/shell${QML2_IMPORT_PATH:+:$QML2_IMPORT_PATH}" \
+QML_IMPORT_PATH="$ROOT/shell${QML_IMPORT_PATH:+:$QML_IMPORT_PATH}" \
+PATH="$ROOT/bin:$PATH" \
+  quickshell -p "$config_dir" --no-color >"$log" 2>&1 &
+QS_PID=$!
+
+for _ in {1..80}; do
+  [[ -s $result ]] && break
+  if ! kill -0 "$QS_PID" 2>/dev/null; then
+    sed -n '1,220p' "$log" >&2
+    fail "lock password overflow quickshell exited before writing result"
+  fi
+  sleep 0.1
+done
+
+[[ -s $result ]] || {
+  sed -n '1,220p' "$log" >&2
+  fail "lock password overflow test timed out"
+}
+
+if ! jq -e '.ok == true' "$result" >/dev/null; then
+  printf 'Lock password overflow result:\n' >&2
+  jq . "$result" >&2
+  printf 'Lock password overflow log:\n' >&2
+  sed -n '1,220p' "$log" >&2
+  fail "lock password dots shrink to fit the field"
+fi
+
+pass "lock password dots shrink to fit the field"