Refine category select tree gutters and tighten activity charts.

Restore RTL tree lines in category dropdowns, require product category on add, and improve chart bar density with Y-axis tooltips.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/business/src/components/CategoryTreeSelect.module.css

@@ -1,4 +1,5 @@
 .wrapper {
+  position: relative;
   display: flex;
   flex-direction: column;
   min-height: 0;
@@ -74,13 +75,26 @@
 }
 
 .panel {
-  max-height: min(42vh, 320px);
+  position: absolute;
+  top: calc(100% + 6px);
+  left: 0;
+  right: 0;
+  z-index: 120;
+  max-height: min(320px, 50vh);
   overflow-y: auto;
-  margin-top: 6px;
+  margin-top: 0;
   padding: 4px;
-  background: rgba(255, 255, 255, 0.4);
+  background: rgba(255, 255, 255, 0.98);
   border: 1px solid var(--glass-border);
   border-radius: var(--radius-sm);
+  box-shadow: 0 10px 28px rgba(31, 38, 135, 0.14);
+}
+
+.panelInFlow {
+  position: static;
+  margin-top: 6px;
+  max-height: min(42vh, 320px);
+  z-index: auto;
 }
 
 .row {