Finish the wonderland: System told truthfully, in eight tabs instead of ten

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

tests/quickshell/gnome-handoff-contract

@@ -55,6 +55,21 @@ fail() {
 # Fedora", explaining that GNOME's file-history switches would not take effect
 # in a Hyprland session anyway -- is gone, because the switches it was
 # apologizing for are now buttons that work.
+# "color" joined with the same argument, one page over. System Health's Fedora
+# card offered Color profiles because Panama's Displays page did not have them;
+# it has had them per display for some time -- automatic, sRGB, wide gamut or
+# HDR, with bit depth and SDR brightness beside them -- so the row was pointing
+# at GNOME for something the desktop's own display page does better, since it
+# is the page that knows which output you mean.
+#
+# "system region" joined when Region & Language stopped being a page that
+# offered a language picker and a link, and its contents became the Language &
+# formats card on Date, Time & Region: a language picker, four per-category
+# format dropdowns backed by the installed locales, and a live preview of what
+# each choice actually renders. GNOME's panel does the same job with the same
+# locales, so a row pointing at it is now a door out of a page that does the
+# thing. The retired page carried two: that one, and an "Open appearance"
+# handoff left over from when the fonts lived here.
 declare -A OWNED=(
     [network]=connectivity
     [wifi]=connectivity
@@ -64,6 +79,8 @@ declare -A OWNED=(
     [users]=users
     [system\ users]=users
     [privacy]=privacy
+    [system\ region]=datetime
+    [color]=displays
 )
 
 # Handoffs that are correct despite naming an owned panel, with the reason.
@@ -127,6 +144,20 @@ if grep -q 'openGnomePanel' "$settings_dir/PrivacyPage.qml"; then
     violations=$((violations + 1))
 fi
 
+# The same, for the page that no longer exists. RegionPage's two handoffs went
+# with the file, but the card they sat in moved to DateTimePage, and a card can
+# be moved with its rows intact -- so this is asserted against the page that
+# received the content rather than against the one that was deleted.
+if [[ -e "$settings_dir/RegionPage.qml" ]]; then
+    printf 'gnome handoff contract: RegionPage.qml still exists; its route retired to datetime\n' >&2
+    violations=$((violations + 1))
+fi
+if grep -q 'openGnomePanel' "$settings_dir/DateTimePage.qml"; then
+    printf 'gnome handoff contract: DateTimePage opens a GNOME panel for something it now does itself:\n' >&2
+    grep -n 'openGnomePanel' "$settings_dir/DateTimePage.qml" >&2
+    violations=$((violations + 1))
+fi
+
 if (( violations > 0 )); then
     printf 'Each of these sends someone to GNOME for a page this app already has.\n' >&2
     exit 1