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/08-weapons/77_BPC_RecoilSystem.md

@@ -49,4 +49,53 @@
 
 - RecoilPattern is a CurveVector from DA_WeaponData — swap per weapon
 - For hitscan weapons, call ApplyRecoil on every shot. For projectile, call on fire release
-- Recovery runs on tick when bIsRecovering; disable tick at rest for performance
+- Recovery runs on tick when bIsRecovering; disable tick at rest for performance
+
+---
+
+## Manual Implementation Guide
+
+### Class Setup
+1. Create Blueprint Class: Parent = `ActorComponent`, Name = `BPC_RecoilSystem`
+2. Attach to `BP_RangedWeapon` or Player Character
+3. **⚠️ Local only** — recoil is cosmetic, not replicated
+
+### Variable Init (BeginPlay)
+```
+Event BeginPlay
+  ├─ Set CurrentRecoilOffset = (0, 0)
+  ├─ Set bIsRecovering = false
+  ├─ Read RecoilPattern from DA_WeaponData
+  └─ Cache: BPC_CameraStateLayer (from Player)
+```
+
+### Function Node-by-Node
+
+#### `ApplyRecoil(ShotCount: Integer, bADS: Boolean)` → `void`
+```
+Step 1: Sample RecoilPattern curve at ShotCount (or accumulated counter)
+Step 2: Get curve output: Pitch = X channel, Yaw = Y channel
+Step 3: If bADS: Pitch *= ADSRecoilMultiplier, Yaw *= ADSRecoilMultiplier
+Step 4: CurrentRecoilOffset.X += Pitch, CurrentRecoilOffset.Y += Yaw
+Step 5: Push to camera:
+  BPC_CameraStateLayer.AddControllerPitch(Pitch)  ← or PlayCameraShake
+  BPC_CameraStateLayer.AddControllerYaw(Yaw)
+Step 6: Set bIsRecovering = true
+Step 7: Set Timer (0.05s loop) → TickRecovery  ← timer runs while recovering
+```
+
+#### `TickRecovery(DeltaTime: Float)` → `void`
+```
+Step 1: CurrentRecoilOffset = Lerp(CurrentRecoilOffset, Vector2D(0,0), RecoverySpeed * DeltaTime)
+Step 2: If CurrentRecoilOffset nearly zero (< 0.01):
+  ResetRecoil()
+  Clear Recovery timer
+```
+
+### Build Checklist
+- [ ] Create BPC_RecoilSystem, attach to Player
+- [ ] Create RecoilPattern CurveVector per weapon (X=pitch, Y=yaw)
+- [ ] Implement ApplyRecoil with curve sampling + ADS multiplier
+- [ ] Implement TickRecovery with lerp toward zero
+- [ ] Wire to BPC_FirearmSystem.OnFire
+- [ ] Test: fire weapon → camera kicks up → recovers to center