feat: add 'T' hotkey to convert first tag to project

Implement a new 'T' hotkey that automatically converts the first tag
of a task into its project field. This provides a quick workflow for
users who initially tag tasks and later want to organize them into
projects.

The operation:
- Takes the first tag from the selected task
- Sets it as the task's project
- Removes the tag from the task's tag list

This is useful for migrating from tag-based organization to
project-based organization in Taskwarrior.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

2 files changed, 35 insertions, 0 deletions

diff --git a/internal/ui/keyhandlers.go b/internal/ui/keyhandlers.go
index 204d08f..71a0ddc 100644
--- a/internal/ui/keyhandlers.go
+++ b/internal/ui/keyhandlers.go
@@ -87,6 +87,8 @@ func (m *Model) handleNormalMode(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		return m.handleEditTags()
 	case "J":
 		return m.handleEditProject()
+	case "T":
+		return m.handleTagToProject()
 	case "c":
 		return m.handleRandomTheme()
 	case "C":
@@ -411,6 +413,38 @@ func (m *Model) handleEditProject() (tea.Model, tea.Cmd) {
 	return m, nil
 }
 
+func (m *Model) handleTagToProject() (tea.Model, tea.Cmd) {
+	id, err := m.getSelectedTaskID()
+	if err != nil {
+		return m, nil
+	}
+	
+	// Get the task at cursor
+	currentTask := m.getTaskAtCursor()
+	if currentTask == nil || len(currentTask.Tags) == 0 {
+		// No tags to convert
+		return m, nil
+	}
+	
+	// Get the first tag
+	firstTag := currentTask.Tags[0]
+	
+	// Set the tag as project
+	if err := task.SetProject(id, firstTag); err != nil {
+		m.showError(err)
+		return m, nil
+	}
+	
+	// Remove the tag from the task
+	if err := task.RemoveTags(id, []string{firstTag}); err != nil {
+		m.showError(err)
+		return m, nil
+	}
+	
+	m.reload()
+	return m, m.startBlink(id, false)
+}
+
 func (m *Model) handleRandomTheme() (tea.Model, tea.Cmd) {
 	m.theme = RandomTheme()
 	m.applyTheme()
diff --git a/internal/ui/table.go b/internal/ui/table.go
index 9def986..8366b57 100644
--- a/internal/ui/table.go
+++ b/internal/ui/table.go
@@ -707,6 +707,7 @@ func (m Model) buildHelpContent() string {
 		m.formatHelpLine("R", "edit recurrence", keyStyle, descStyle),
 		m.formatHelpLine("t", "edit tags", keyStyle, descStyle),
 		m.formatHelpLine("J", "edit project", keyStyle, descStyle),
+		m.formatHelpLine("T", "convert first tag to project", keyStyle, descStyle),
 		m.formatHelpLine("a, A", "add/replace annotations", keyStyle, descStyle),
 		m.formatHelpLine("o", "open URL from description", keyStyle, descStyle),
 		"")