feat(helm): add automatic application secrets creation

Changes:
- Add templates/app-secrets.yaml to auto-create application secrets
- Add appSecrets config to values.yaml (disabled by default)
- Enable appSecrets in values-production.yaml with placeholders
- Auto-generates peikarband-prod-secrets with:
  - db-username
  - db-password
  - redis-password

Usage in ArgoCD:
Set parameters in UI:
  - appSecrets.dbUsername: <your-db-username>
  - appSecrets.dbPassword: <your-db-password>
  - appSecrets.redisPassword: <your-redis-password>

This resolves 'secret peikarband-prod-secrets not found' error.

helm/peikarband/values-production.yaml

@@ -17,6 +17,14 @@ registrySecret:
 imagePullSecrets:
   - name: hub-registry-secret
 
+# Auto-create application secrets (database, redis, etc)
+appSecrets:
+  enabled: true
+  name: peikarband-prod-secrets
+  dbUsername: "REPLACE_ME"  # Set via ArgoCD UI: Parameters → appSecrets.dbUsername
+  dbPassword: "REPLACE_ME"  # Set via ArgoCD UI: Parameters → appSecrets.dbPassword
+  redisPassword: "REPLACE_ME"  # Set via ArgoCD UI: Parameters → appSecrets.redisPassword
+
 # Reflex configuration for production
 reflex:
   apiUrl: "https://peikarband.ir"  # Production API URL

helm/peikarband/values.yaml

@@ -18,6 +18,14 @@ registrySecret:
   username: "admin"  # Set via ArgoCD values or --set
   password: "5459ed7590d37656410fae38bdf59eb7ee33b68cd4c"  # Set via ArgoCD values or --set
 
+# Application secrets (database, redis, etc)
+appSecrets:
+  enabled: false  # Set to true in production values
+  name: peikarband-prod-secrets
+  dbUsername: ""  # Set via ArgoCD values or --set
+  dbPassword: ""  # Set via ArgoCD values or --set
+  redisPassword: ""  # Set via ArgoCD values or --set
+
 nameOverride: ""
 fullnameOverride: ""