Implement 10 UI/UX improvements and bug fixes

- Fix outdated Todoist task URL format (showTask -> app/task)
- Fix quick-add date defaulting to tomorrow in evening (client-side JS)
- Add tap-to-expand for task descriptions with checkbox completion
- Add visual differentiation: overdue (red), future (gray), today (normal)
- Sort tasks by urgency: overdue > today-timed > today-allday > future
- Keep completed tasks visible with strikethrough until refresh
- Add random Unsplash landscape background with content overlay
- Hide future tasks behind collapsible fold with count badge
- Unified modal menu for Quick Add + Bug Report (Ctrl+K shortcut)
- Click task title to edit description in modal

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 54 insertions, 33 deletions

diff --git a/internal/handlers/tabs.go b/internal/handlers/tabs.go
index bd15710..2f22c44 100644
--- a/internal/handlers/tabs.go
+++ b/internal/handlers/tabs.go
@@ -25,6 +25,25 @@ func isActionableList(name string) bool {
 		strings.Contains(lower, "today")
 }
 
+// atomUrgencyTier returns the urgency tier for sorting:
+// 0: Overdue, 1: Today with time, 2: Today all-day, 3: Future, 4: No due date
+func atomUrgencyTier(a models.Atom) int {
+	if a.DueDate == nil {
+		return 4 // No due date
+	}
+	if a.IsOverdue {
+		return 0 // Overdue
+	}
+	if a.IsFuture {
+		return 3 // Future
+	}
+	// Due today
+	if a.HasSetTime {
+		return 1 // Today with specific time
+	}
+	return 2 // Today all-day
+}
+
 // TabsHandler handles tab-specific rendering with Atom model
 type TabsHandler struct {
 	store     *store.Store
@@ -88,41 +107,31 @@ func (h *TabsHandler) HandleTasks(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	// Compute UI fields (IsOverdue, HasSetTime)
+	// Compute UI fields (IsOverdue, IsFuture, HasSetTime)
 	for i := range atoms {
 		atoms[i].ComputeUIFields()
 	}
 
-	// Sort atoms: by DueDate (earliest first), then by HasSetTime, then by Priority
+	// Sort atoms by urgency tiers:
+	// 1. Overdue (before today)
+	// 2. Today with specific time
+	// 3. Today all-day (midnight)
+	// 4. Future
+	// 5. No due date
+	// Within each tier: sort by due date/time, then by priority
 	sort.SliceStable(atoms, func(i, j int) bool {
-		// Handle nil due dates (push to end)
-		if atoms[i].DueDate == nil && atoms[j].DueDate != nil {
-			return false
-		}
-		if atoms[i].DueDate != nil && atoms[j].DueDate == nil {
-			return true
+		// Compute urgency tier (lower = more urgent)
+		tierI := atomUrgencyTier(atoms[i])
+		tierJ := atomUrgencyTier(atoms[j])
+
+		if tierI != tierJ {
+			return tierI < tierJ
 		}
 
-		// Both have due dates
+		// Same tier: sort by due date/time if both have dates
 		if atoms[i].DueDate != nil && atoms[j].DueDate != nil {
-			// Compare by date only (ignore time)
-			dateI := atoms[i].DueDate.Truncate(24 * time.Hour)
-			dateJ := atoms[j].DueDate.Truncate(24 * time.Hour)
-
-			if !dateI.Equal(dateJ) {
-				return dateI.Before(dateJ)
-			}
-
-			// Same day: tasks with set times come before midnight tasks
-			if atoms[i].HasSetTime != atoms[j].HasSetTime {
-				return atoms[i].HasSetTime
-			}
-
-			// Both have set times or both are midnight, sort by actual time
-			if atoms[i].HasSetTime && atoms[j].HasSetTime {
-				if !atoms[i].DueDate.Equal(*atoms[j].DueDate) {
-					return atoms[i].DueDate.Before(*atoms[j].DueDate)
-				}
+			if !atoms[i].DueDate.Equal(*atoms[j].DueDate) {
+				return atoms[i].DueDate.Before(*atoms[j].DueDate)
 			}
 		}
 
@@ -130,15 +139,27 @@ func (h *TabsHandler) HandleTasks(w http.ResponseWriter, r *http.Request) {
 		return atoms[i].Priority > atoms[j].Priority
 	})
 
+	// Partition atoms into current (overdue + today) and future
+	var currentAtoms, futureAtoms []models.Atom
+	for _, a := range atoms {
+		if a.IsFuture {
+			futureAtoms = append(futureAtoms, a)
+		} else {
+			currentAtoms = append(currentAtoms, a)
+		}
+	}
+
 	// Render template
 	data := struct {
-		Atoms  []models.Atom
-		Boards []models.Board
-		Today  string
+		Atoms       []models.Atom // Current tasks (overdue + today)
+		FutureAtoms []models.Atom // Future tasks (hidden by default)
+		Boards      []models.Board
+		Today       string
 	}{
-		Atoms:  atoms,
-		Boards: boards,
-		Today:  time.Now().Format("2006-01-02"),
+		Atoms:       currentAtoms,
+		FutureAtoms: futureAtoms,
+		Boards:      boards,
+		Today:       time.Now().Format("2006-01-02"),
 	}
 
 	if err := h.templates.ExecuteTemplate(w, "tasks-tab", data); err != nil {