feat(web): equal-width project cards, drop worktree counters

Project boxes now use a fixed two-column grid so every card is the
same width. The worktree count line is removed — the information
lives in the worktree picker that follows a project selection.

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

web/src/styles.css

@@ -3749,7 +3749,7 @@ input.leaf-rename:focus {
 
 .picker.projects {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
+  grid-template-columns: repeat(2, 1fr);
   align-content: start;
   gap: var(--sp-2);
   max-height: 300px;
@@ -3805,19 +3805,6 @@ input.leaf-rename:focus {
   overflow-wrap: anywhere;
 }
 
-.project-meta {
-  font-family: var(--font-mono);
-  font-size: var(--fs-12);
-  color: var(--faint);
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.project-meta:empty {
-  display: none;
-}
-
 .project-other {
   align-self: flex-start;
   padding: 4px 0;