Cleanup goal unlocks behaviour

core/goals/README.md

@@ -23,6 +23,16 @@ extends Resource
 
 @export var id: StringName = &""                    # Unique identifier
 @export var requirements: Array[GoalRequirementData] # Conditions to complete
+@export var unlock_behavior: UnlockBehavior = MANUAL # AUTOMATIC or MANUAL
+```
+
+### Enum
+
+```gdscript
+enum UnlockBehavior {
+	AUTOMATIC,  # Goal completes immediately when met
+	MANUAL,     # Goal requires player to click unlock button
+}
 ```
 
 ### Methods
@@ -94,9 +104,11 @@ func _on_currency_changed(currency_id, new_amount):
 
 ### Manual Unlock vs Automatic
 
-Generators can be configured to:
-- **Automatic**: Unlock immediately when goal completes
-- **Manual**: Goal completion enables a button player must click
+Goals control their own unlock behavior via `unlock_behavior`:
+- **AUTOMATIC**: Goal completes immediately when requirements are met
+- **MANUAL**: Goal stays incomplete until player clicks unlock button
+
+Generators with `unlock_goal` automatically unlock when the goal completes.
 
 ## Usage Example
 
@@ -130,9 +142,10 @@ amount_exponent = 6  # 1,000,000
 In `CurrencyGeneratorData`:
 ```gdscript
 @export var unlock_goal: GoalData  # Assign goal resource
-@export var unlock_goal_behavior: UnlockGoalBehavior = AUTOMATIC
 ```
 
+The goal's `unlock_behavior` determines if the generator unlocks automatically or requires manual button click.
+
 ## Signals
 
 ```gdscript