Enhance narrative systems with detailed implementation guides and data-driven structures

- Updated BPC_NarrativeStateSystem with a comprehensive manual implementation guide, including class setup, variable initialization, and function breakdowns.
- Expanded BPC_ObjectiveSystem documentation to include a manual implementation guide and detailed function descriptions.
- Added a manual implementation guide for BPC_DialoguePlaybackSystem, outlining class setup and function nodes.
- Introduced a manual implementation guide for BPC_DialogueChoiceSystem, detailing choice presentation and selection processes.
- Enhanced BPC_BranchingConsequenceSystem documentation with a manual implementation guide for consequence evaluation.
- Updated BPC_TrialScenarioSystem with a manual implementation guide for scenario management.
- Expanded BPC_LoreUnlockSystem documentation to include a manual implementation guide for lore entry management.
- Added a manual implementation guide for BP_NarrativeTriggerVolume, detailing trigger volume setup and action execution.
- Enhanced BPC_EndingAccumulator documentation with a manual implementation guide for ending evaluation.
- Updated BPC_HitReactionSystem with a manual implementation guide for hit reaction management.
- Added a manual implementation guide for BPC_RecoilSystem, detailing recoil application and recovery processes.
- Introduced DT_ProjectTags.csv to define gameplay tags for various systems, enhancing data-driven design capabilities.

docs/blueprints/07-narrative/59_BPC_ObjectiveSystem.md

@@ -114,4 +114,75 @@ Tracks active, completed, and failed objectives. Supports main objectives, sub-o
 | [`SS_SaveManager`](../05-save/28_SS_SaveManager.md) | [`I_Persistable`](../01-core/29_I_Persistable.md) | Objective state persistence |
 
 ### Reuse Notes
-Define objectives via `DA_ObjectiveData` data assets (one per objective) that specify display text, dependencies, associated narrative flag, and optional/hidden flags. The objective system reads from these assets at level start. Adding a new objective type (like timed objectives) requires adding an `S_TimedObjective` struct extension and a timer function — no system redesign needed.
+Define objectives via `DA_ObjectiveData` data assets (one per objective) that specify display text, dependencies, associated narrative flag, and optional/hidden flags. The objective system reads from these assets at level start. Adding a new objective type (like timed objectives) requires adding an `S_TimedObjective` struct extension and a timer function — no system redesign needed.
+
+---
+
+## Manual Implementation Guide
+
+### Class Setup
+1. Create Blueprint Class: Parent = `ActorComponent`, Name = `BPC_ObjectiveSystem`
+2. Add to Player Character
+3. Define struct `S_ObjectiveState`: ObjectiveTag, Status (E_ObjectiveStatus), DisplayText (Text), Description (Text), bIsHidden (Boolean), bIsOptional (Boolean), Dependencies (Array<GameplayTag>)
+
+### Variable Init (BeginPlay)
+```
+Event BeginPlay
+  ├─ Set AllObjectives = empty Map<GameplayTag, S_ObjectiveState>
+  ├─ Set ActiveObjectiveTags, CompletedObjectiveTags, FailedObjectiveTags = empty arrays
+  └─ Get Owner → Cache BPC_NarrativeStateSystem
+```
+
+### Function Node-by-Node
+
+#### `RegisterObjectiveFromDataAsset(ObjTag, DataAsset)` → `void`
+```
+Step 1: Read DA_ObjectiveData fields
+Step 2: Create S_ObjectiveState struct:
+  ObjectiveTag = ObjTag, Status = Inactive
+  DisplayText = DataAsset.ObjectiveText
+  Dependencies = DataAsset.PrerequisiteFlags
+  bIsHidden = (DataAsset.ObjectiveCategory == Hidden)
+  bIsOptional = DataAsset.bIsOptional
+Step 3: AllObjectives.Add(ObjTag, newState)
+```
+
+#### `ActivateObjective(ObjTag)` → `void`
+```
+Step 1: State = AllObjectives.Find(ObjTag) — if not found, return
+Step 2: If State.bIsHidden: return (hidden until revealed)
+Step 3: Call CheckDependenciesMet(ObjTag) → if not met: set Status=Inactive, return
+Step 4: State.Status = Active
+Step 5: ActiveObjectiveTags.Add Unique(ObjTag)
+Step 6: Fire OnObjectiveActivated(ObjTag, DisplayData)
+Step 7: Update GS_CoreGameState.ActiveObjectiveTags
+```
+
+#### `CompleteObjective(ObjTag)` → `void`
+```
+Step 1: Validate Status == Active → if not, return
+Step 2: State.Status = Complete
+Step 3: Move: ActiveObjectiveTags.Remove(ObjTag) → CompletedObjectiveTags.Add(ObjTag)
+Step 4: Fire OnObjectiveCompleted(ObjTag)
+Step 5: Set narrative flag: BPC_NarrativeStateSystem.SetFlag(ObjTag, true)
+Step 6: Check dependent objectives: ForEach AllObjectives → if Deps include ObjTag → ActivateObjective
+```
+
+#### `GetActiveObjectives()` → `Array<S_ObjectiveDisplayData>`
+```
+Create results array → ForEach ActiveObjectiveTags:
+  State = AllObjectives.Find(tag)
+  Create S_ObjectiveDisplayData(Tag, State.DisplayText, false, State.bIsOptional)
+  Add to results
+Return results
+```
+
+### Build Checklist
+- [ ] Create BPC_ObjectiveSystem, add to Player Character
+- [ ] Define E_ObjectiveStatus enum and S_ObjectiveState struct
+- [ ] Implement RegisterObjectiveFromDataAsset
+- [ ] Implement ActivateObjective with dependency check
+- [ ] Implement CompleteObjective with cascading activation
+- [ ] Implement GetActiveObjectives for UI binding
+- [ ] Sync to GS_CoreGameState.ActiveObjectiveTags
+- [ ] Test: register objective → activate → complete → dependent activates