fix(waybar): clock tooltip uses single chrono format block

Two bare `{:%…}` specs emptied the hover tooltip (box with no text).
One strftime block with an embedded newline shows date + zone; ensure
tooltip label colors on generated + summer bars.

themes/boreal/waybar.jsonc

@@ -40,7 +40,7 @@
     "format": "{:%H:%M  ·  %a %d %b}",
     "on-click": "nomarchy-calendar",
     "tooltip": true,
-    "tooltip-format": "{:%A, %d %B %Y}\n{:%Z (UTC%z)}"
+    "tooltip-format": "{:%A, %d %B %Y\n%Z (UTC%z)}"
   },
   "hyprland/workspaces": {
     "disable-scroll": true,

themes/executive-slate/waybar.jsonc

@@ -47,7 +47,7 @@
     "format": "{:%H:%M  ·  %a %d %b}",
     "on-click": "nomarchy-calendar",
     "tooltip": true,
-    "tooltip-format": "{:%A, %d %B %Y}\n{:%Z (UTC%z)}"
+    "tooltip-format": "{:%A, %d %B %Y\n%Z (UTC%z)}"
   },
   "custom/recording": {
     "return-type": "json",

themes/summer-day/waybar.css

@@ -152,3 +152,10 @@ window#waybar {
 #custom-nightlight,
 #custom-vpn,
 #custom-notification { font-size: 17px; }
+
+tooltip {
+  background: @bg0;
+  border: 1px solid @grey1;
+  border-radius: 8px;
+}
+tooltip label { color: @fg; }

themes/summer-day/waybar.jsonc

@@ -97,7 +97,7 @@
     "format": " {:%H:%M  ·  %a %d %b}",
     "on-click": "nomarchy-calendar",
     "tooltip": true,
-    "tooltip-format": "{:%A, %d %B %Y}\n{:%Z (UTC%z)}"
+    "tooltip-format": "{:%A, %d %B %Y\n%Z (UTC%z)}"
   },
   "tray": {
     "spacing": 8

themes/summer-night/waybar.css

@@ -160,3 +160,10 @@ window#waybar {
 #custom-nightlight,
 #custom-vpn,
 #custom-notification { font-size: 17px; }
+
+tooltip {
+  background: @bg0;
+  border: 1px solid @grey1;
+  border-radius: 8px;
+}
+tooltip label { color: @fg; }

themes/summer-night/waybar.jsonc

@@ -96,7 +96,7 @@
     "format": " {:%H:%M  ·  %a %d %b}",
     "on-click": "nomarchy-calendar",
     "tooltip": true,
-    "tooltip-format": "{:%A, %d %B %Y}\n{:%Z (UTC%z)}"
+    "tooltip-format": "{:%A, %d %B %Y\n%Z (UTC%z)}"
   },
   "tray": {
     "spacing": 8