diff --git a/docs/web/diagrams/auth/confirm-user.mmd b/docs/web/diagrams/auth/confirm-user.mmd
index f340267c..dc680e76 100644
--- a/docs/web/diagrams/auth/confirm-user.mmd
+++ b/docs/web/diagrams/auth/confirm-user.mmd
@@ -2,21 +2,19 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant ConfirmHandler as ConfirmUserHandler
         participant UserMgr as UserManager(ApplicationUser)
         participant TokenSvc as TokenService
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant JWT as JWT Infrastructure
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: POST /api/auth/confirm?token={token} (requires Bearer access token)
     activate API
     API->>Mediator: Send(ConfirmUserCommand(token))
diff --git a/docs/web/diagrams/auth/delete-account.mmd b/docs/web/diagrams/auth/delete-account.mmd
index 8467d2d5..c1788cb2 100644
--- a/docs/web/diagrams/auth/delete-account.mmd
+++ b/docs/web/diagrams/auth/delete-account.mmd
@@ -2,17 +2,15 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant DeleteAccountHandler
         participant UserMgr as UserManager(ApplicationUser)
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: DELETE /api/auth/account (requires Bearer access token)
     activate API
     API->>Mediator: Send(DeleteAccountCommand(GetAuthenticatedUserId()))
@@ -37,7 +35,7 @@ sequenceDiagram
         UserMgr->>UserStore: DeleteAsync(user)
         activate UserStore
         UserStore->>DB: DELETE FROM UserAccount WHERE UserAccountID = @Id
-        Note right of UserStore: UserCredential, UserVerification, and UserProfile cascade on delete (UserAvatar cascades transitively through UserProfile). Posts, comments, photos, and follows use ON DELETE NO ACTION — if any reference this account, the DELETE throws a foreign key violation (SQL error 547)
+        Note right of UserStore: UserCredential, UserVerification, and UserProfile cascade on delete<br/>(UserAvatar cascades transitively through UserProfile).<br/>Posts, comments, photos, and follows use ON DELETE NO ACTION<br/>if any reference this account, the DELETE throws a foreign key violation (SQL error 547)
 
         alt Foreign key violation (dependent records exist)
             UserStore-->>UserMgr: IdentityResult.Failed (AccountHasDependentRecords)
@@ -49,7 +47,7 @@ sequenceDiagram
         deactivate UserMgr
 
         alt Account has dependent records
-            DeleteAccountHandler->>Mediator: throw ConflictException "Account cannot be deleted while it still has associated posts, comments, photos, or follows."
+            DeleteAccountHandler->>Mediator: throw ConflictException<br>"Account cannot be deleted while it still has associated posts, comments, photos, or follows."
             Mediator->>API: propagate
             API->>User: 409 Conflict
         else !result.Succeeded (other failure)
diff --git a/docs/web/diagrams/auth/login.mmd b/docs/web/diagrams/auth/login.mmd
index 06de7dcc..55d55356 100644
--- a/docs/web/diagrams/auth/login.mmd
+++ b/docs/web/diagrams/auth/login.mmd
@@ -2,22 +2,20 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant LoginHandler
         participant UserMgr as UserManager(ApplicationUser)
         participant TokenSvc as TokenService
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant Argon2 as Argon2PasswordHasher
         participant JWT as JWT Infrastructure
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: POST /api/auth/login {username, password}
     activate API
     API->>Mediator: Send(LoginCommand)
diff --git a/docs/web/diagrams/auth/refresh-token.mmd b/docs/web/diagrams/auth/refresh-token.mmd
index ca1273b9..4e23bb4f 100644
--- a/docs/web/diagrams/auth/refresh-token.mmd
+++ b/docs/web/diagrams/auth/refresh-token.mmd
@@ -2,21 +2,19 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant RefreshHandler as RefreshTokenHandler
         participant UserMgr as UserManager(ApplicationUser)
         participant TokenSvc as TokenService
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant JWT as JWT Infrastructure
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: POST /api/auth/refresh<br/>Header: X-Refresh-Token: {token}
     activate API
     API->>Mediator: Send(RefreshTokenCommand(refreshToken))
diff --git a/docs/web/diagrams/auth/registration.mmd b/docs/web/diagrams/auth/registration.mmd
index dd3a0dc4..efc66e2b 100644
--- a/docs/web/diagrams/auth/registration.mmd
+++ b/docs/web/diagrams/auth/registration.mmd
@@ -2,26 +2,24 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant RegHandler as RegisterUserHandler
         participant UserMgr as UserManager(ApplicationUser)
         participant TokenSvc as TokenService
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant Argon2 as Argon2PasswordHasher
         participant JWT as JWT Infrastructure
         participant SMTP as Email Provider
         participant Template as Template Provider
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
         participant ProfileHandler as CreateUserProfileHandler<br/>(Profile slice)
         participant EmailDispatcher as EmailDispatcher<br/>(Features.Emails)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: POST /api/auth/register {username, firstName, lastName, email, dateOfBirth, password}
     activate API
     API->>Mediator: Send(RegisterUserCommand)
diff --git a/docs/web/diagrams/auth/resend-confirmation.mmd b/docs/web/diagrams/auth/resend-confirmation.mmd
index 2c2e271e..cd985da3 100644
--- a/docs/web/diagrams/auth/resend-confirmation.mmd
+++ b/docs/web/diagrams/auth/resend-confirmation.mmd
@@ -2,23 +2,21 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant ResendHandler as ResendConfirmationEmailHandler
         participant UserMgr as UserManager(ApplicationUser)
         participant TokenSvc as TokenService
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant SMTP as Email Provider
         participant Template as Template Provider
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
         participant EmailDispatcher as EmailDispatcher<br/>(Features.Emails)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: POST /api/auth/confirm/resend?userId={id} (requires Bearer access token)
     activate API
     API->>Mediator: Send(ResendConfirmationEmailCommand(userId))
diff --git a/docs/web/diagrams/auth/update-email.mmd b/docs/web/diagrams/auth/update-email.mmd
index f7f875b5..14f029e4 100644
--- a/docs/web/diagrams/auth/update-email.mmd
+++ b/docs/web/diagrams/auth/update-email.mmd
@@ -2,17 +2,15 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant UpdateEmailHandler
         participant UserMgr as UserManager(ApplicationUser)
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: PATCH /api/auth/email {newEmail} (requires Bearer access token)
     activate API
     API->>Mediator: Send(UpdateEmailCommand(GetAuthenticatedUserId(), newEmail))
diff --git a/docs/web/diagrams/auth/update-password.mmd b/docs/web/diagrams/auth/update-password.mmd
index 8f249c4d..ba09c5d0 100644
--- a/docs/web/diagrams/auth/update-password.mmd
+++ b/docs/web/diagrams/auth/update-password.mmd
@@ -2,20 +2,18 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant UpdatePasswordHandler
         participant UserMgr as UserManager(ApplicationUser)
     end
-    box rgb(235,236,227) Infrastructure Layer
+    box Infrastructure Layer
         participant Argon2 as Argon2PasswordHasher
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: PATCH /api/auth/password {currentPassword, newPassword} (requires Bearer access token)
     activate API
     API->>Mediator: Send(UpdatePasswordCommand(GetAuthenticatedUserId(), currentPassword, newPassword))
diff --git a/docs/web/diagrams/auth/update-profile.mmd b/docs/web/diagrams/auth/update-profile.mmd
index 1d91cb72..4180f9c4 100644
--- a/docs/web/diagrams/auth/update-profile.mmd
+++ b/docs/web/diagrams/auth/update-profile.mmd
@@ -2,17 +2,15 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant UpdateProfileHandler
         participant UserMgr as UserManager(ApplicationUser)
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: PATCH /api/auth/profile {firstName, lastName, dateOfBirth} (requires Bearer access token)
     activate API
     API->>Mediator: Send(UpdateProfileCommand(GetAuthenticatedUserId(), firstName, lastName, dateOfBirth))
diff --git a/docs/web/diagrams/auth/update-username.mmd b/docs/web/diagrams/auth/update-username.mmd
index 07b0d5d8..d25c075d 100644
--- a/docs/web/diagrams/auth/update-username.mmd
+++ b/docs/web/diagrams/auth/update-username.mmd
@@ -2,17 +2,15 @@ sequenceDiagram
     actor User
     participant API as API Controller
     participant Mediator as MediatR pipeline<br/>(ValidationBehavior)
-    box rgb(241,243,234) Handler Layer
+    box Handler Layer
         participant UpdateUsernameHandler
         participant UserMgr as UserManager(ApplicationUser)
     end
-    box rgb(219,238,221) Repository / Cross-slice
+    box Repository / Cross-slice
         participant UserStore as DapperUserStore<br/>(IUserStore/IUserPasswordStore/IUserEmailStore)
     end
     participant DB as SQL Server
 
-    Note over UserMgr: ASP.NET Core Identity's UserManager replaces the deleted AuthRepository — handlers delegate to UserManager, which calls DapperUserStore (persistence) and Argon2PasswordHasher.
-
     User->>API: PATCH /api/auth/username {newUsername} (requires Bearer access token)
     activate API
     API->>Mediator: Send(UpdateUsernameCommand(GetAuthenticatedUserId(), newUsername))