waybar: work around DST bug in built-in clock module

waybar 0.15.0's clock module reads PST instead of PDT, showing time
an hour behind. Replace with custom/exec calling date directly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

waybar/config.jsonc

@@ -4,7 +4,7 @@
   "height": 32,
 
   "modules-left": ["niri/workspaces"],
-  "modules-center": ["clock"],
+  "modules-center": ["custom/clock"],
   "modules-right": ["cpu", "temperature", "custom/power-profile", "custom/fan-profile", "pulseaudio", "network", "battery", "custom/mouse-battery", "tray"],
   "custom/mouse-battery": {
     "exec": "~/.config/waybar/mouse-battery.sh",
@@ -51,9 +51,11 @@
     "on-click": "~/.local/bin/fan-profile --menu"
   },
 
-  "clock": {
-    "timezone": "America/Vancouver",
-    "format": "{:%a %b %d  %H:%M}"
+  "custom/clock": {
+    "exec": "date '+%a %b %d  %H:%M'",
+    "interval": 30,
+    "format": "{}",
+    "tooltip": false
   },
 
   "battery": {

waybar/style.css

@@ -19,7 +19,7 @@ window#waybar {
   color: @tn-blue;
 }
 
-#clock, #battery, #network, #pulseaudio,
+#custom-clock, #battery, #network, #pulseaudio,
 #cpu, #temperature,
 #custom-power-profile, #custom-fan-profile {
   padding: 0 12px;