fix(dashboard): show external calendar name and location in upcoming events

Imports fmtLocation; renderUpcomingEvents adds event-item__cal span for
cal_name and shows location with normalized ICS escapes via fmtLocation().
Event color dot gets filter: saturate(0.4) to match calendar view style.

public/styles/dashboard.css

@@ -369,6 +369,7 @@
   border-radius: var(--radius-full);
   flex-shrink: 0;
   background-color: var(--color-accent);
+  filter: saturate(0.4);
 }
 
 .event-item__content {
@@ -392,9 +393,16 @@
   margin-top: 1px;
   display: flex;
   align-items: center;
+  flex-wrap: wrap;
   gap: var(--space-1);
 }
 
+.event-item__cal {
+  width: 100%;
+  font-size: var(--text-xs);
+  color: var(--color-text-disabled);
+}
+
 .event-time-badge {
   font-size: var(--text-xs);
   font-weight: var(--font-weight-semibold);