feat: inline pane tabs, add-pane mode, and grid chrome cleanup

- Tab bar now shows pane names inline with status icons instead of
  generic tab names with counts, eliminating the separate pane list row
- chromeTop reduced from 4 to 3, gaining one extra row of content space
- Add-pane mode (Ctrl+N) lets users add panes to existing tabs from picker
- Picker tab bar updated to match inline pane name format
- Session formatters and launch actions updated for branch switching

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

src/index.ts

@@ -72,7 +72,7 @@ async function main() {
       try {
         const state = extractSessionState()
         if (state) saveSessionSync(state)
-      } catch {}
+      } catch (err) { console.error("[session-save]", err) }
       if (app.monitorInterval) { clearInterval(app.monitorInterval); app.monitorInterval = null }
       if (app.directGrid) app.directGrid.destroyAll()
       stopAllCaptures()
@@ -187,7 +187,7 @@ async function main() {
   getUsageSummary().then(u => {
     app.cachedUsage = u
     updateUsagePanel()
-  }).catch(() => {})
+  }).catch(err => console.error("[usage]", err))
 
   // Resize PTY panes when terminal window is resized
   process.stdout.on("resize", () => {
@@ -220,7 +220,7 @@ async function main() {
       try {
         app.cachedUsage = await getUsageSummary()
         updateUsagePanel()
-      } catch {}
+      } catch (err) { console.error("[usage-poll]", err) }
     }
 
     if (app.demoMode) {