style(fe): standardize filter inputs in ShadowRunQueue page

- Input height: 34px (standard KBX compact)
- Search input: max-width 350px (matches ModelsList)
- Padding: 0 0.75rem
- Line-height: 34px for vertical centering
- Box-sizing: border-box for consistent sizing
- Status select: min-width 150px

Aligns with PageLayout + ModelsList standardization.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/features/shadow-run/pages/ShadowRunQueue.vue

@@ -225,22 +225,26 @@ h1 {
 }
 
 .search-input {
-  width: 240px;
-  max-width: 280px;
+  min-width: 200px;
+  max-width: 350px;
+  width: 100%;
 }
 
 .status-select {
-  width: 140px;
+  min-width: 150px;
 }
 
 .input {
-  padding: var(--spacing-2) var(--spacing-3);
+  height: 34px;
+  padding: 0 0.75rem;
   border: var(--border-width-1) solid var(--color-input-border);
-  border-radius: var(--border-radius-base);
+  border-radius: 4px;
   background: var(--color-input-background);
   color: var(--color-text-primary);
-  font-size: var(--font-size-sm);
+  font-size: 13px;
   font-family: var(--font-sans);
+  line-height: 34px;
+  box-sizing: border-box;
   transition: all var(--transition-fast);
 }