feat(ui): add project-only filter with [ prefix in kanban

internal/ui/app.go

@@ -420,7 +420,7 @@ func NewAppModel(database *db.DB, exec *executor.Executor, workingDir string) *A
 
 	// Setup filter input
 	filterInput := textinput.New()
-	filterInput.Placeholder = "Filter by project, type, or text..."
+	filterInput.Placeholder = "Filter text, #id, or [project..."
 	filterInput.CharLimit = 50
 
 	// Get available executors for form filtering and warnings
@@ -1459,9 +1459,32 @@ func (m *AppModel) applyFilter() {
 // Returns -1 if the task doesn't match, otherwise returns a positive score.
 // Higher scores indicate better matches.
 // This uses the same matching logic as the command palette (Ctrl+P) for consistency.
+//
+// Special prefixes:
+//   - "[project" filters only on the project field (matches the [project] display format)
 func scoreTaskForFilter(task *db.Task, query string) int {
 	bestScore := -1
 
+	// Check for project-only filter prefix "[" (matches display format [project])
+	if strings.HasPrefix(query, "[") {
+		projectQuery := strings.TrimPrefix(query, "[")
+		// Also strip trailing ] if present (user typed full "[project]")
+		projectQuery = strings.TrimSuffix(projectQuery, "]")
+		if projectQuery == "" {
+			// Just "[" typed, show all tasks with a project
+			if task.Project != "" {
+				return 100
+			}
+			return -1
+		}
+		// Only match against project field
+		projectScore := fuzzyScore(task.Project, projectQuery)
+		if projectScore > 0 {
+			return projectScore
+		}
+		return -1
+	}
+
 	// Check task ID (exact or prefix match gets high priority)
 	idStr := fmt.Sprintf("%d", task.ID)
 	if strings.HasPrefix(query, "#") {

internal/ui/app_test.go

@@ -461,6 +461,49 @@ func TestScoreTaskForFilter(t *testing.T) {
 			wantMin: -1,
 			wantMax: -1,
 		},
+		// Project-only filter tests (using [ prefix)
+		{
+			name:    "project-only filter matches project",
+			task:    &db.Task{ID: 1, Title: "Some task", Project: "workflow"},
+			query:   "[workflow",
+			wantMin: 100,
+			wantMax: 500,
+		},
+		{
+			name:    "project-only filter with fuzzy match",
+			task:    &db.Task{ID: 1, Title: "Some task", Project: "offerlab"},
+			query:   "[ol",
+			wantMin: 100,
+			wantMax: 500,
+		},
+		{
+			name:    "project-only filter excludes title matches",
+			task:    &db.Task{ID: 1, Title: "workflow improvements", Project: ""},
+			query:   "[workflow",
+			wantMin: -1,
+			wantMax: -1,
+		},
+		{
+			name:    "project-only filter with trailing bracket",
+			task:    &db.Task{ID: 1, Title: "Task", Project: "influencekit"},
+			query:   "[influencekit]",
+			wantMin: 100,
+			wantMax: 700, // exact match gets high score
+		},
+		{
+			name:    "just bracket shows tasks with project",
+			task:    &db.Task{ID: 1, Title: "Task", Project: "myproject"},
+			query:   "[",
+			wantMin: 100,
+			wantMax: 100,
+		},
+		{
+			name:    "just bracket hides tasks without project",
+			task:    &db.Task{ID: 1, Title: "Task", Project: ""},
+			query:   "[",
+			wantMin: -1,
+			wantMax: -1,
+		},
 	}
 
 	for _, tt := range tests {