style: reduce sidebar typography sizes for denser thread rows

Author: Dimillian

src/styles/sidebar.css

@@ -1152,9 +1152,9 @@
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
-  font-size: 13px;
-  font-weight: 600;
-  line-height: 1.3;
+  font-size: 12px;
+  font-weight: 500;
+  line-height: 1.2;
 }
 
 .thread-details {
@@ -1186,7 +1186,7 @@
 
 .thread-workspace-label {
   color: var(--text-muted);
-  font-size: 11px;
+  font-size: 10px;
 }
 
 .thread-subagent-pill,
@@ -1321,7 +1321,7 @@
 
 .thread-time {
   color: var(--text-faint);
-  font-size: 11px;
+  font-size: 10px;
   white-space: nowrap;
   padding-top: 2px;
 }
@@ -1333,7 +1333,7 @@
   display: inline-flex;
   align-items: center;
   justify-content: flex-end;
-  font-size: 11px;
+  font-size: 10px;
   line-height: 1.2;
   padding: 0;
   -webkit-app-region: no-drag;