feat(ui): polish filter controls with pill styling and custom arrows

- controlsRow selects: pill shape (border-radius: 999px), appearance:none,
  custom SVG chevron arrow, hover/focus transitions
- advancedToggle: pill button with border, matches select height
- filterSelect (advanced panel): appearance:none, custom arrow, 8px radius,
  focus ring consistent with search input
- clearButton: pill shape matching other controls
- filters panel: separator line and spacing when expanded

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

nextjs-app/components/FilterBar.module.css

@@ -88,30 +88,49 @@
 
 .filters {
   display: flex;
-  gap: 0.75rem;
+  gap: 0.625rem;
   flex-wrap: wrap;
+  margin-top: 0.625rem;
+  padding-top: 0.625rem;
+  border-top: 1px solid var(--border-color, #e5dfd5);
 }
 
 .filterSelect {
+  appearance: none;
+  -webkit-appearance: none;
   flex: 1;
-  min-width: 200px;
+  min-width: 180px;
-  padding: 0.75rem 1rem;
+  padding: 0.625rem 2.25rem 0.625rem 1rem;
-  font-size: 0.95rem;
+  font-size: 0.875rem;
-  border: 1px solid var(--border-color, #e5dfd5);
+  font-weight: 500;
-  border-radius: 6px;
+  font-family: inherit;
-  background: var(--bg-card, white);
+  border: 1.5px solid var(--border-color, #e5dfd5);
+  border-radius: 8px;
+  background-color: var(--bg-card, white);
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238a847a' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 0.875rem center;
+  background-size: 10px 6px;
   cursor: pointer;
   outline: none;
   color: var(--text-primary, #1a1612);
+  transition: border-color 0.15s ease, box-shadow 0.15s ease;
+}
+
+.filterSelect:hover {
+  border-color: var(--text-muted, #8a847a);
 }
 
 .filterSelect:focus {
   border-color: var(--accent-coral, #e07256);
+  box-shadow: 0 0 0 3px rgba(224, 114, 86, 0.12);
 }
 
 .clearButton {
-  padding: 0.75rem 1.25rem;
+  padding: 0.4rem 1rem;
-  font-size: 0.95rem;
+  font-size: 0.8125rem;
+  font-weight: 500;
+  border-radius: 999px;
 }
 
 @media (max-width: 768px) {
@@ -157,29 +176,20 @@
 }
 
 .radiusLabel {
-  font-size: 0.875rem;
+  font-size: 0.8125rem;
-  color: var(--text-secondary);
+  font-weight: 500;
+  color: var(--text-secondary, #5a554d);
   white-space: nowrap;
 }
 
-.radiusSelect {
-  padding: 0.375rem 0.75rem;
-  border: 1px solid var(--border-color, #e0ddd8);
-  border-radius: var(--radius-md);
-  background: var(--bg-card);
-  color: var(--text-secondary);
-  font-size: 0.875rem;
-  cursor: pointer;
-}
-
 /* ── Controls row (radius + phase + advanced toggle) ─── */
 .controlsRow {
   display: flex;
   align-items: center;
-  gap: 0.75rem;
+  gap: 0.5rem;
   flex-wrap: wrap;
-  margin-top: 0.75rem;
+  margin-top: 0.875rem;
-  padding-top: 0.75rem;
+  padding-top: 0.875rem;
   border-top: 1px solid var(--border-color, #e5dfd5);
 }
 
@@ -194,19 +204,36 @@
   flex-shrink: 0;
 }
 
+/* Pill-style inline filter controls (radius + phase) */
 .controlSelect {
-  padding: 0.375rem 0.75rem;
+  appearance: none;
-  font-size: 0.875rem;
+  -webkit-appearance: none;
-  border: 1px solid var(--border-color, #e5dfd5);
+  padding: 0.4rem 2rem 0.4rem 0.875rem;
-  border-radius: 6px;
+  font-size: 0.8125rem;
-  background: var(--bg-card, white);
+  font-weight: 500;
+  font-family: inherit;
+  border: 1.5px solid var(--border-color, #e5dfd5);
+  border-radius: 999px;
+  background-color: var(--bg-card, white);
+  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%238a847a' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
+  background-repeat: no-repeat;
+  background-position: right 0.65rem center;
+  background-size: 10px 6px;
   color: var(--text-primary, #1a1612);
   cursor: pointer;
   outline: none;
+  transition: border-color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
+  white-space: nowrap;
+}
+
+.controlSelect:hover {
+  border-color: var(--text-muted, #8a847a);
+  background-color: var(--bg-secondary, #f8f4ef);
 }
 
 .controlSelect:focus {
   border-color: var(--accent-coral, #e07256);
+  box-shadow: 0 0 0 3px rgba(224, 114, 86, 0.12);
 }
 
 /* ── Advanced filters toggle ─────────────────────────── */
@@ -216,17 +243,22 @@
   align-items: center;
   gap: 0.375rem;
   background: none;
-  border: none;
+  border: 1.5px solid var(--border-color, #e5dfd5);
-  padding: 0.375rem 0;
+  border-radius: 999px;
+  padding: 0.4rem 0.875rem;
   font-size: 0.8125rem;
-  color: var(--text-muted, #8a847a);
+  font-weight: 500;
+  color: var(--text-secondary, #5a554d);
   cursor: pointer;
   font-family: inherit;
-  transition: color 0.15s ease;
+  transition: all 0.15s ease;
+  white-space: nowrap;
 }
 
 .advancedToggle:hover {
-  color: var(--text-secondary, #5a554d);
+  border-color: var(--text-muted, #8a847a);
+  background-color: var(--bg-secondary, #f8f4ef);
+  color: var(--text-primary, #1a1612);
 }
 
 .chevronDown,
@@ -234,14 +266,14 @@
   display: inline-block;
   width: 0;
   height: 0;
-  border-left: 4px solid transparent;
+  border-left: 3.5px solid transparent;
-  border-right: 4px solid transparent;
+  border-right: 3.5px solid transparent;
 }
 
 .chevronDown {
-  border-top: 5px solid currentColor;
+  border-top: 4.5px solid currentColor;
 }
 
 .chevronUp {
-  border-bottom: 5px solid currentColor;
+  border-bottom: 4.5px solid currentColor;
 }