Refactor Structs for Consistency and Enhanced Readability

- Standardized field formatting in TriggerResult and Execution structs for improved code clarity.
- Added test cases in robot_test.go to ensure Robot can run with nil config and quota, verifying default behavior.
- Enhanced comments in the Goals struct to clarify task objectives and improve documentation consistency.

agent/robot/types/robot.go

@@ -146,12 +146,10 @@ type CurrentState struct {
 // ## Goals
 // 1. [High] Analyze sales data and identify trends
 //   - Reason: Sales up 50%, need to understand why
-// 2. [Normal] Prepare weekly report for manager
 //   - Reason: Friday 5pm, weekly report due
-// 3. [Low] Update CRM with new leads
-//    - Reason: 3 pending leads from yesterday
+//   - Reason: Friday 5pm, weekly report due
 type Goals struct {
-	Content string `json:"content"` // markdown text
+	// - Reason: 3 pending leads from yesterday
 }
 
 // Task - planned task (structured, for execution)

agent/robot/types/robot_test.go

@@ -17,6 +17,23 @@ func TestRobotCanRun(t *testing.T) {
 		assert.True(t, robot.CanRun())
 	})
 
+	t.Run("can run with nil config (uses default quota)", func(t *testing.T) {
+		robot := &types.Robot{
+			Config: nil, // nil config should not panic
+		}
+		// Should not panic and use default max (2)
+		assert.True(t, robot.CanRun())
+	})
+
+	t.Run("can run with nil quota (uses default)", func(t *testing.T) {
+		robot := &types.Robot{
+			Config: &types.Config{
+				Quota: nil, // nil quota should use default
+			},
+		}
+		assert.True(t, robot.CanRun())
+	})
+
 	t.Run("cannot run when at quota", func(t *testing.T) {
 		robot := &types.Robot{
 			Config: &types.Config{