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- Fix outdated Todoist task URL format (showTask -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, 30 insertions, 1 deletions

diff --git a/internal/api/todoist.go b/internal/api/todoist.go
index b51fffd..14c6c0b 100644
--- a/internal/api/todoist.go
+++ b/internal/api/todoist.go
@@ -266,7 +266,7 @@ func ConvertSyncItemsToTasks(items []SyncItemResponse, projectMap map[string]str
 			Priority:    item.Priority,
 			Completed:   false,
 			Labels:      item.Labels,
-			URL:         fmt.Sprintf("https://todoist.com/showTask?id=%s", item.ID),
+			URL:         fmt.Sprintf("https://todoist.com/app/task/%s", item.ID),
 		}
 
 		// Parse added_at
@@ -389,6 +389,35 @@ func (c *TodoistClient) CreateTask(ctx context.Context, content, projectID strin
 	return task, nil
 }
 
+// UpdateTask updates a task with the specified changes
+func (c *TodoistClient) UpdateTask(ctx context.Context, taskID string, updates map[string]interface{}) error {
+	jsonData, err := json.Marshal(updates)
+	if err != nil {
+		return fmt.Errorf("failed to marshal updates: %w", err)
+	}
+
+	url := fmt.Sprintf("%s/tasks/%s", c.baseURL, taskID)
+	req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(jsonData))
+	if err != nil {
+		return fmt.Errorf("failed to create request: %w", err)
+	}
+	req.Header.Set("Authorization", "Bearer "+c.apiKey)
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return fmt.Errorf("failed to update task: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK && resp.StatusCode != http.StatusNoContent {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("todoist API error (status %d): %s", resp.StatusCode, string(body))
+	}
+
+	return nil
+}
+
 // CompleteTask marks a task as complete in Todoist
 func (c *TodoistClient) CompleteTask(ctx context.Context, taskID string) error {
 	// Create POST request to close endpoint