feat: unify Google Tasks with main system via caching and integrated UI

- Implement SQLite caching layer for Google Tasks
- Integrate Google Tasks into unified Atoms loop (showing in Tasks tab)
- Update Planning tab to include cached Google Tasks
- Enhance Quick Add form with Todoist project selector
- Remove orphaned HandleTasksTab/HandleRefreshTab methods
- Update tests to reflect new BuildTimeline signature and data structures

1 files changed, 16 insertions, 2 deletions

diff --git a/internal/handlers/atoms.go b/internal/handlers/atoms.go
index 0ebf4e6..e99c879 100644
--- a/internal/handlers/atoms.go
+++ b/internal/handlers/atoms.go
@@ -1,13 +1,14 @@
 package handlers
 
 import (
+	"log"
 	"sort"
 
 	"task-dashboard/internal/models"
 	"task-dashboard/internal/store"
 )
 
-// BuildUnifiedAtomList creates a list of atoms from tasks and cards
+// BuildUnifiedAtomList creates a list of atoms from tasks, cards, and google tasks
 func BuildUnifiedAtomList(s *store.Store) ([]models.Atom, []models.Board, error) {
 	tasks, err := s.GetTasks()
 	if err != nil {
@@ -19,7 +20,13 @@ func BuildUnifiedAtomList(s *store.Store) ([]models.Atom, []models.Board, error)
 		return nil, nil, err
 	}
 
-	atoms := make([]models.Atom, 0, len(tasks))
+	gTasks, err := s.GetGoogleTasks()
+	if err != nil {
+		// Log but don't fail if gtasks fails (might be new/not configured)
+		log.Printf("Warning: failed to fetch cached google tasks: %v", err)
+	}
+
+	atoms := make([]models.Atom, 0, len(tasks)+len(gTasks))
 
 	// Add incomplete tasks
 	for _, task := range tasks {
@@ -28,6 +35,13 @@ func BuildUnifiedAtomList(s *store.Store) ([]models.Atom, []models.Board, error)
 		}
 	}
 
+	// Add incomplete google tasks
+	for _, gTask := range gTasks {
+		if !gTask.Completed {
+			atoms = append(atoms, models.GoogleTaskToAtom(gTask))
+		}
+	}
+
 	// Add cards with due dates or from actionable lists
 	for _, board := range boards {
 		for _, card := range board.Cards {