fix(iot-hub): let active-filters row grow when chips wrap so card grid doesn't overlap

PROD-8420: .tb-iot-hub-sort-row was locked to height: 32px, so when many use-case filters were selected the chip-set wrapped to multiple lines but the row stayed one line tall and the card grid below rendered on top of the wrapped chips. Switch to min-height: 32px so the row keeps its baseline single-line height when empty but grows naturally with wrapped chips.

ui-ngx/src/app/modules/home/components/iot-hub/iot-hub-browse.component.scss

@@ -359,14 +359,17 @@
   }
 }
 
-// Filter chips row — Design: 32px tall, no padding, centered
 .tb-iot-hub-sort-row {
-  height: 32px;
+  min-height: 32px;
   align-items: center;
   padding: 0;
   margin-top: 16px;
   margin-bottom: 12px;
 
+  ::ng-deep .mat-mdc-chip-set .mdc-evolution-chip-set__chips {
+    row-gap: 8px;
+  }
+
   .mat-mdc-chip {
     margin-top: 0;
     margin-bottom: 0;