feat: start empty Today planning from mobile dock (Closes #611)

frontend/dashboard.js

@@ -67,9 +67,11 @@
     isTodayActive: () => workSession.checkpointed(),
     isTodayResumable: () => workSession.resumable(),
     getTodayCount: () => todayMyWork.length,
+    getEligibleCount: () => activeMyWork.length,
     continueToday: continueTodaySession,
     resumeToday: resumeTodaySession,
     startToday: startTodaySession,
+    planToday: () => openPlanToday(mobileTaskButtons.work),
     openFallback: openMobileWorkFallback,
   });
   const mobileTaskDock = createMobileTaskDock({

frontend/mobile-task-dock.js

@@ -43,6 +43,7 @@
       continue: ['Continue', 'Continue Today'],
       resume: ['Resume', 'Resume Today'],
       start: ['Start', 'Start Today'],
+      plan: ['Plan', 'Plan Today'],
       work: ['Work', 'Work'],
     };
     const workMode = labels[mode] ? mode : 'work';

frontend/mobile-work-entry.js

@@ -6,6 +6,7 @@
     if (options.isTodayActive()) return 'continue';
     if (options.getTodayCount() > 0 && options.isTodayResumable()) return 'resume';
     if (options.getTodayCount() > 0) return 'start';
+    if (options.getEligibleCount() > 0) return 'plan';
     return 'work';
   }
 
@@ -14,6 +15,7 @@
     if (current === 'continue') options.continueToday();
     else if (current === 'resume') options.resumeToday();
     else if (current === 'start') options.startToday();
+    else if (current === 'plan') options.planToday();
     else options.openFallback();
     return current;
   }