feat: add project field support to TaskSamurai

Add comprehensive project field support including:
- Project column in table view with automatic width calculation
- 'J' hotkey to edit project in both table and detail views
- Project field in task detail view (between Start and Entry)
- Search functionality includes project names
- Enter key on project column allows inline editing

The project field integrates seamlessly with Taskwarrior's native
project support and follows the same UI patterns as other editable
fields in the application.

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

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

5 files changed, 158 insertions, 26 deletions

diff --git a/internal/task/task.go b/internal/task/task.go
index 86c93f4..2c7f8e8 100644
--- a/internal/task/task.go
+++ b/internal/task/task.go
@@ -26,6 +26,7 @@ type Task struct {
 	ID          int          `json:"id"`
 	UUID        string       `json:"uuid"`
 	Description string       `json:"description"`
+	Project     string       `json:"project"`
 	Tags        []string     `json:"tags"`
 	Status      string       `json:"status"`
 	Start       string       `json:"start"`
@@ -298,6 +299,11 @@ func SetDescription(id int, desc string) error {
 	return modifyTask(id, "description:"+desc)
 }
 
+// SetProject changes the project of the task with the given id.
+func SetProject(id int, project string) error {
+	return modifyTask(id, "project:"+project)
+}
+
 // Annotate adds an annotation to the task with the given id.
 func Annotate(id int, text string) error {
 	if id <= 0 {
diff --git a/internal/ui/handlers.go b/internal/ui/handlers.go
index 576519c..1bc65c0 100644
--- a/internal/ui/handlers.go
+++ b/internal/ui/handlers.go
@@ -227,6 +227,28 @@ func (m *Model) handleRecurrenceMode(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	return model, cmd
 }
 
+// handleProjectMode handles project editing
+func (m *Model) handleProjectMode(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
+	onEnter := func(value string) error {
+		return task.SetProject(m.projID, value)
+	}
+	
+	onExit := func() {
+		m.projEditing = false
+		m.reload()
+	}
+	
+	model, cmd := m.handleTextInput(msg, &m.projInput, onEnter, onExit)
+	if msg.Type == tea.KeyEnter {
+		if m.showTaskDetail {
+			// In detail view, blink the project field
+			return model, m.startDetailBlink(fieldProject) // Project field index in detail view
+		}
+		return model, m.startBlink(m.projID, false)
+	}
+	return model, cmd
+}
+
 // handlePriorityMode handles priority selection
 func (m *Model) handlePriorityMode(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 	switch msg.Type {
@@ -477,6 +499,9 @@ func (m *Model) handleEditingModes(msg tea.KeyMsg) (handled bool, model tea.Mode
 	case m.recurEditing:
 		model, cmd = m.handleRecurrenceMode(msg)
 		return true, model, cmd
+	case m.projEditing:
+		model, cmd = m.handleProjectMode(msg)
+		return true, model, cmd
 	case m.prioritySelecting:
 		model, cmd = m.handlePriorityMode(msg)
 		return true, model, cmd
@@ -595,7 +620,7 @@ func (m *Model) handleDetailFieldEdit() (tea.Model, tea.Cmd) {
 	id := m.currentTaskDetail.ID
 	
 	// Map detail field index to editable fields
-	// fieldPriority = 3, fieldTags = 4, fieldDue = 5, fieldStart = 6, fieldRecur = 8 or 9 (depending on if fields exist)
+	// fieldPriority = 3, fieldTags = 4, fieldDue = 5, fieldStart = 6, fieldProject = 7, fieldRecur = 9 or 10 (depending on if fields exist)
 	
 	// Count fields up to current position to handle dynamic fields
 	fieldPos := 0
@@ -666,13 +691,29 @@ func (m *Model) handleDetailFieldEdit() (tea.Model, tea.Cmd) {
 	}
 	fieldPos++
 	
-	// Entry (7)
+	// Project (7)
+	if m.detailFieldIndex == fieldPos {
+		m.clearEditingModes()
+		m.projID = id
+		m.projEditing = true
+		if m.currentTaskDetail.Project != "" {
+			m.projInput.SetValue(m.currentTaskDetail.Project)
+		} else {
+			m.projInput.SetValue("")
+		}
+		m.projInput.Focus()
+		m.updateTableHeight()
+		return m, nil
+	}
+	fieldPos++
+	
+	// Entry (8)
 	if m.detailFieldIndex == fieldPos {
 		return m, nil // Not editable
 	}
 	fieldPos++
 	
-	// Recurrence (8) - only if it exists
+	// Recurrence (9) - only if it exists
 	if m.currentTaskDetail.Recur != "" {
 		if m.detailFieldIndex == fieldPos {
 			m.clearEditingModes()
@@ -686,7 +727,7 @@ func (m *Model) handleDetailFieldEdit() (tea.Model, tea.Cmd) {
 		fieldPos++
 	}
 	
-	// Description (9)
+	// Description (10 or 11 depending on recurrence)
 	if m.detailFieldIndex == fieldPos {
 		// Launch external editor for description
 		m.detailDescEditing = true
diff --git a/internal/ui/keyhandlers.go b/internal/ui/keyhandlers.go
index 419bc14..204d08f 100644
--- a/internal/ui/keyhandlers.go
+++ b/internal/ui/keyhandlers.go
@@ -85,6 +85,8 @@ func (m *Model) handleNormalMode(msg tea.KeyMsg) (tea.Model, tea.Cmd) {
 		return m.handleAddTask()
 	case "t":
 		return m.handleEditTags()
+	case "J":
+		return m.handleEditProject()
 	case "c":
 		return m.handleRandomTheme()
 	case "C":
@@ -387,6 +389,28 @@ func (m *Model) handleEditTags() (tea.Model, tea.Cmd) {
 	return m, nil
 }
 
+func (m *Model) handleEditProject() (tea.Model, tea.Cmd) {
+	id, err := m.getSelectedTaskID()
+	if err != nil {
+		return m, nil
+	}
+	
+	m.clearEditingModes()
+	m.projID = id
+	m.projEditing = true
+	
+	// Get current project value
+	task := m.getTaskAtCursor()
+	if task != nil {
+		m.projInput.SetValue(task.Project)
+	} else {
+		m.projInput.SetValue("")
+	}
+	m.projInput.Focus()
+	m.updateTableHeight()
+	return m, nil
+}
+
 func (m *Model) handleRandomTheme() (tea.Model, tea.Cmd) {
 	m.theme = RandomTheme()
 	m.applyTheme()
@@ -539,7 +563,19 @@ func (m *Model) handleEnterOrEdit() (tea.Model, tea.Cmd) {
 		m.updateTableHeight()
 		return m, nil
 		
-	case 3: // Due date
+	case 3: // Project
+		m.clearEditingModes()
+		m.projID = id
+		m.projEditing = true
+		task := m.getTaskAtCursor()
+		if task != nil {
+			m.projInput.SetValue(task.Project)
+		}
+		m.projInput.Focus()
+		m.updateTableHeight()
+		return m, nil
+		
+	case 4: // Due date
 		m.dueID = id
 		task := m.getTaskAtCursor()
 		if task != nil && task.Due != "" {
@@ -556,7 +592,7 @@ func (m *Model) handleEnterOrEdit() (tea.Model, tea.Cmd) {
 		m.updateTableHeight()
 		return m, nil
 		
-	case 4: // Recurrence
+	case 5: // Recurrence
 		m.clearEditingModes()
 		m.recurID = id
 		m.recurEditing = true
@@ -568,7 +604,7 @@ func (m *Model) handleEnterOrEdit() (tea.Model, tea.Cmd) {
 		m.updateTableHeight()
 		return m, nil
 		
-	case 5: // Tags
+	case 6: // Tags
 		m.clearEditingModes()
 		m.tagsID = id
 		m.tagsEditing = true
@@ -577,7 +613,7 @@ func (m *Model) handleEnterOrEdit() (tea.Model, tea.Cmd) {
 		m.updateTableHeight()
 		return m, nil
 		
-	case 6: // Annotations
+	case 7: // Annotations
 		m.clearEditingModes()
 		m.annotateID = id
 		m.annotating = true
@@ -596,7 +632,7 @@ func (m *Model) handleEnterOrEdit() (tea.Model, tea.Cmd) {
 		m.updateTableHeight()
 		return m, nil
 		
-	case 7: // Description
+	case 8: // Description
 		m.clearEditingModes()
 		m.descID = id
 		m.descEditing = true
diff --git a/internal/ui/table.go b/internal/ui/table.go
index a430dcf..9def986 100644
--- a/internal/ui/table.go
+++ b/internal/ui/table.go
@@ -63,6 +63,10 @@ type Model struct {
 	recurID      int
 	recurInput   textinput.Model
 
+	projEditing bool
+	projID      int
+	projInput   textinput.Model
+
 	filterEditing bool
 	filterInput   textinput.Model
 
@@ -113,6 +117,7 @@ type Model struct {
 	tagsWidth  int
 	descWidth  int
 	annWidth   int
+	projWidth  int
 
 	total      int
 	inProgress int
@@ -215,6 +220,7 @@ func (m *Model) clearEditingModes() {
 	m.tagsEditing = false
 	m.dueEditing = false
 	m.recurEditing = false
+	m.projEditing = false
 	m.filterEditing = false
 	m.addingTask = false
 	m.searching = false
@@ -270,6 +276,8 @@ func New(filters []string, browserCmd string) (Model, error) {
 	m.tagsInput.Prompt = "tags: "
 	m.recurInput = textinput.New()
 	m.recurInput.Prompt = "recur: "
+	m.projInput = textinput.New()
+	m.projInput.Prompt = "project: "
 	m.dueDate = time.Now()
 	m.searchInput = textinput.New()
 	m.searchInput.Prompt = "search: "
@@ -296,6 +304,7 @@ func (m *Model) newTable(rows []atable.Row) (atable.Model, atable.Styles) {
 		{Title: "Pri", Width: m.priWidth},
 		{Title: "ID", Width: m.idWidth},
 		{Title: "Age", Width: m.ageWidth},
+		{Title: "Project", Width: m.projWidth},
 		{Title: "Due", Width: m.dueWidth},
 		{Title: "Recur", Width: m.recurWidth},
 		{Title: "Tags", Width: m.tagsWidth},
@@ -346,16 +355,19 @@ func (m *Model) reload() error {
 	for i, tsk := range tasks {
 		rows = append(rows, m.taskToRowSearch(tsk, m.searchRegex, m.tblStyles, -1))
 		if m.searchRegex != nil {
+			if m.searchRegex.MatchString(tsk.Project) {
+				m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 3})
+			}
 			tags := strings.Join(tsk.Tags, " ")
 			if m.searchRegex.MatchString(tags) {
-				m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 5})
+				m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 6})
 			}
 			if m.searchRegex.MatchString(tsk.Description) {
-				m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 7})
+				m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 8})
 			}
 			for _, a := range tsk.Annotations {
 				if m.searchRegex.MatchString(a.Description) {
-					m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 6})
+					m.searchMatches = append(m.searchMatches, cellMatch{row: i, col: 7})
 					break
 				}
 			}
@@ -616,6 +628,12 @@ func (m Model) View() string {
 			m.recurInput.View(),
 		)
 	}
+	if m.projEditing {
+		view = lipgloss.JoinVertical(lipgloss.Left,
+			view,
+			m.projInput.View(),
+		)
+	}
 	if m.filterEditing {
 		view = lipgloss.JoinVertical(lipgloss.Left,
 			view,
@@ -688,6 +706,7 @@ func (m Model) buildHelpContent() string {
 		m.formatHelpLine("r", "set random due date", keyStyle, descStyle),
 		m.formatHelpLine("R", "edit recurrence", keyStyle, descStyle),
 		m.formatHelpLine("t", "edit tags", keyStyle, descStyle),
+		m.formatHelpLine("J", "edit project", keyStyle, descStyle),
 		m.formatHelpLine("a, A", "add/replace annotations", keyStyle, descStyle),
 		m.formatHelpLine("o", "open URL from description", keyStyle, descStyle),
 		"")
@@ -880,6 +899,7 @@ func (m Model) taskToRow(t task.Task) atable.Row {
 		m.formatPriority(t.Priority, m.priWidth),
 		style.Render(strconv.Itoa(t.ID)),
 		style.Render(age),
+		style.Render(t.Project),
 		m.formatDue(t.Due, m.dueWidth),
 		style.Render(recur),
 		style.Render(tags),
@@ -1034,22 +1054,24 @@ func (m Model) taskToRowSearch(t task.Task, re *regexp.Regexp, styles atable.Sty
 	priStr := m.formatPriority(t.Priority, m.priWidth)
 	idStr := getStyle(1).Render(strconv.Itoa(t.ID))
 	ageStr := getStyle(2).Render(age)
+	projStr := m.highlightCell(getStyle(3), re, t.Project)
 	dueStr := m.formatDue(t.Due, m.dueWidth)
-	recurStr := m.highlightCell(getStyle(4), re, recur)
-	tagStr := m.highlightCell(getStyle(5), re, tags)
+	recurStr := m.highlightCell(getStyle(5), re, recur)
+	tagStr := m.highlightCell(getStyle(6), re, tags)
 	annRaw := strings.Join(anns, "; ")
 	annCount := ""
 	if n := len(anns); n > 0 {
 		annCount = strconv.FormatInt(int64(n), 16)
 	}
-	annStr := m.highlightCellMatch(getStyle(6), re, annRaw, annCount)
-	descStr := m.highlightCell(getStyle(7), re, t.Description)
-	urgStr := getStyle(8).Render(m.formatUrgency(urg, m.urgWidth))
+	annStr := m.highlightCellMatch(getStyle(7), re, annRaw, annCount)
+	descStr := m.highlightCell(getStyle(8), re, t.Description)
+	urgStr := getStyle(9).Render(m.formatUrgency(urg, m.urgWidth))
 
 	return atable.Row{
 		priStr,
 		idStr,
 		ageStr,
+		projStr,
 		dueStr,
 		recurStr,
 		tagStr,
@@ -1062,7 +1084,7 @@ func (m Model) taskToRowSearch(t task.Task, re *regexp.Regexp, styles atable.Sty
 func (m Model) expandedCellView() string {
 	row := m.tbl.Cursor()
 	col := m.tbl.ColumnCursor()
-	if row < 0 || row >= len(m.tasks) || col < 0 || col > 8 {
+	if row < 0 || row >= len(m.tasks) || col < 0 || col > 9 {
 		return ""
 	}
 	t := m.tasks[row]
@@ -1078,20 +1100,22 @@ func (m Model) expandedCellView() string {
 			val = fmt.Sprintf("%dd", days)
 		}
 	case 3:
-		val = ansi.Strip(m.formatDue(t.Due, m.dueWidth))
+		val = t.Project
 	case 4:
-		val = t.Recur
+		val = ansi.Strip(m.formatDue(t.Due, m.dueWidth))
 	case 5:
-		val = strings.Join(t.Tags, " ")
+		val = t.Recur
 	case 6:
+		val = strings.Join(t.Tags, " ")
+	case 7:
 		var anns []string
 		for _, a := range t.Annotations {
 			anns = append(anns, a.Description)
 		}
 		val = strings.Join(anns, "; ")
-	case 7:
-		val = t.Description
 	case 8:
+		val = t.Description
+	case 9:
 		val = fmt.Sprintf("%.1f", t.Urgency)
 	}
 	header := ""
@@ -1139,7 +1163,7 @@ func (m *Model) updateTableHeight() {
 	if m.cellExpanded {
 		h--
 	}
-	if m.annotating || m.dueEditing || m.prioritySelecting || m.searching || m.descEditing || m.tagsEditing || m.recurEditing || m.filterEditing || m.addingTask {
+	if m.annotating || m.dueEditing || m.prioritySelecting || m.searching || m.descEditing || m.tagsEditing || m.recurEditing || m.projEditing || m.filterEditing || m.addingTask {
 		h--
 	}
 	if h < 1 {
@@ -1177,6 +1201,7 @@ func (m *Model) computeColumnWidths() {
 	maxRecur := 1
 	maxTags := 0
 	maxAnn := 1
+	maxProj := 1
 	for _, t := range m.tasks {
 		if l := len(strconv.Itoa(t.ID)); l > maxID {
 			maxID = l
@@ -1199,6 +1224,9 @@ func (m *Model) computeColumnWidths() {
 		if l := len(t.Recur); l > maxRecur {
 			maxRecur = l
 		}
+		if l := len(t.Project); l > maxProj {
+			maxProj = l
+		}
 		tags := strings.Join(t.Tags, " ")
 		if l := len(tags); l > maxTags {
 			maxTags = l
@@ -1217,13 +1245,14 @@ func (m *Model) computeColumnWidths() {
 	m.recurWidth = maxRecur
 	m.tagsWidth = maxTags
 	m.annWidth = maxAnn
+	m.projWidth = maxProj
 
 	total := m.tbl.Width()
 	if total == 0 {
 		total = 80
 	}
-	base := m.idWidth + m.priWidth + m.ageWidth + m.dueWidth + m.recurWidth + m.tagsWidth + m.annWidth + m.urgWidth
-	base += 8 // spaces between columns
+	base := m.idWidth + m.priWidth + m.ageWidth + m.dueWidth + m.recurWidth + m.tagsWidth + m.annWidth + m.urgWidth + m.projWidth
+	base += 9 // spaces between columns
 	m.descWidth = total - base
 	if m.descWidth < 1 {
 		m.descWidth = 1
@@ -1239,6 +1268,7 @@ func (m *Model) applyColumns() {
 		{Title: "Pri", Width: m.priWidth},
 		{Title: "ID", Width: m.idWidth},
 		{Title: "Age", Width: m.ageWidth},
+		{Title: "Project", Width: m.projWidth},
 		{Title: "Due", Width: m.dueWidth},
 		{Title: "Recur", Width: m.recurWidth},
 		{Title: "Tags", Width: m.tagsWidth},
diff --git a/internal/ui/taskdetail.go b/internal/ui/taskdetail.go
index 70c06a0..c7a5b89 100644
--- a/internal/ui/taskdetail.go
+++ b/internal/ui/taskdetail.go
@@ -17,6 +17,7 @@ const (
 	fieldTags
 	fieldDue
 	fieldStart
+	fieldProject
 	fieldEntry
 	fieldRecur
 	fieldDescription
@@ -119,6 +120,24 @@ func (m *Model) renderTaskDetail() string {
 	currentField++
 	lines = append(lines, m.renderTaskFieldWithIndex("Start", m.formatTaskDate(t.Start), labelStyle, valueStyle, currentField))
 	currentField++
+	
+	// Project
+	if m.projEditing && m.projID == t.ID {
+		// Show project editing UI without prompt
+		originalPrompt := m.projInput.Prompt
+		m.projInput.Prompt = ""
+		projView := m.projInput.View()
+		m.projInput.Prompt = originalPrompt
+		lines = append(lines, m.renderEditingField("Project", projView, labelStyle, currentField))
+	} else {
+		projectValue := t.Project
+		if projectValue == "" {
+			projectValue = "-"
+		}
+		lines = append(lines, m.renderTaskFieldWithIndex("Project", projectValue, labelStyle, valueStyle, currentField))
+	}
+	currentField++
+	
 	lines = append(lines, m.renderTaskFieldWithIndex("Entry", m.formatTaskDate(t.Entry), labelStyle, valueStyle, currentField))
 	currentField++