feat(bar): doctor tripwire indicator (LATER item)

nomarchy-doctor-status: silent while nomarchy-doctor exits 0 (or is
absent), so the module only exists when something is actually broken —
then a red warning glyph with the first ✖ lines jq-escaped into the
tooltip; clicking opens the full sheet (nomarchy-menu doctor).
Interval 300s: the health check is real work (unit/disk/git sweeps),
and this is a tripwire, not a monitor. Added to the generated bar
(status group, after battery) and to BOTH summer whole-swap bars
(module list + jsonc block + CSS membership + @red rule) per the
parity rule.

Verified: V0; V1 — template-home builds with the module in config +
CSS, the status script passes bash -n, both summer jsonc still parse;
functional — the self-gate exits silently, and a shimmed failing
doctor yields jq-valid JSON with class "bad" and the ✖ lines in the
tooltip. Live render queued for hardware.

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

themes/summer-day/waybar.css

@@ -55,6 +55,7 @@ window#waybar {
 #custom-updates,
 #battery,
 #tray,
+#custom-doctor,
 #custom-notification,
 #custom-powermenu {
   background-color: @bg0;
@@ -127,3 +128,8 @@ window#waybar {
 #custom-recording.recording {
   color: @red;
 }
+
+/* Doctor tripwire: only rendered when something is broken. */
+#custom-doctor {
+  color: @red;
+}