fix: weather card spacing and sizing consistency

- Increase temp size to 2rem and add explicit font-size to condition
- Uniform 0.5rem spacing below current temp (was 0.35rem)
- Today row font-size explicit at 0.85rem
- Forecast gap 0.75rem (was 0.5rem), min-width 4.5rem (was 3.5rem)
- Padding-top on forecast strip 0.75rem to match overall rhythm

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

frontend/src/components/WeatherCard.vue

@@ -107,34 +107,36 @@ const fetchedAtLabel = computed(() => {
   display: flex;
   align-items: baseline;
   gap: 0.75rem;
-  margin-bottom: 0.35rem;
+  margin-bottom: 0.5rem;
 }
 
 .weather-temp {
-  font-size: 1.8rem;
+  font-size: 2rem;
   font-weight: 700;
   line-height: 1;
 }
 
 .weather-condition {
   color: var(--color-text-muted);
+  font-size: 0.9rem;
 }
 
 .weather-today {
   color: var(--color-text-secondary);
   margin-bottom: 0.75rem;
+  font-size: 0.85rem;
 }
 
 .weather-delta {
   color: var(--color-text-muted);
-  font-size: 0.85rem;
+  font-size: 0.82rem;
 }
 
 .weather-forecast {
   display: flex;
-  gap: 0.5rem;
+  gap: 0.75rem;
   overflow-x: auto;
-  padding-top: 0.5rem;
+  padding-top: 0.75rem;
   border-top: 1px solid var(--color-border);
 }
 
@@ -142,8 +144,8 @@ const fetchedAtLabel = computed(() => {
   display: flex;
   flex-direction: column;
   align-items: center;
-  gap: 0.2rem;
-  min-width: 3.5rem;
+  gap: 0.25rem;
+  min-width: 4.5rem;
   font-size: 0.8rem;
 }