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/spawnForm.ts

@@ -680,16 +680,13 @@ export function createSpawnForm(opts: SpawnFormOptions): SpawnFormHandle {
     box.type = "button";
     box.className = `project-box${isStale(project, new Date()) ? " is-stale" : ""}`;
     box.dataset.cwd = project.path;
-    const trees = worktreesOf(group).length;
     // The parent directory only — the last segment is the name line above it.
     // Unabbreviated beyond `~`, since the stem is what tells two projects
     // sharing a basename apart (#95).
     const parent = abbreviateCwd(parentDir(project.path), homeDir);
-    const meta = trees > 0 ? `${trees} worktree${trees === 1 ? "" : "s"}` : "";
     box.innerHTML = `
       <span class="project-name">${escapeHtml(project.name)}</span>
-      <span class="project-path">${escapeHtml(parent)}</span>
-      <span class="project-meta">${escapeHtml(meta)}</span>`;
+      <span class="project-path">${escapeHtml(parent)}</span>`;
     box.addEventListener("click", () => selectProject(group));
     return box;
   }