extract mermaid docs

docs/website/diagrams/auth/confirm-user.md

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+# User Authentication Flow — Confirm User
+
+```mermaid
+--8<-- "diagrams/website/auth/confirm-user.mmd"
+```

docs/website/diagrams/auth/delete-account.md

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+# User Authentication Flow — Delete Account
+
+```mermaid
+--8<-- "diagrams/website/auth/delete-account.mmd"
+```

docs/website/diagrams/auth/error-handling.md

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+# User Authentication Flow — Error Handling
+
+Global exception mapping performed by `API.Core`'s `GlobalExceptionFilter`. Applies uniformly across every authentication endpoint (registration, login, refresh, confirm, resend, update-username/email/password/profile, delete-account) — see the per-flow diagrams for where each exception type is thrown.
+
+```mermaid
+--8<-- "diagrams/website/auth/error-handling.mmd"
+```

docs/website/diagrams/auth/login.md

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+# User Authentication Flow — Login
+
+```mermaid
+--8<-- "diagrams/website/auth/login.mmd"
+```

docs/website/diagrams/auth/refresh-token.md

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+# User Authentication Flow — Refresh Token
+
+```mermaid
+--8<-- "diagrams/website/auth/refresh-token.mmd"
+```

docs/website/diagrams/auth/registration.md

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+# User Authentication Flow — Registration
+
+```mermaid
+--8<-- "diagrams/website/auth/registration.mmd"
+```

docs/website/diagrams/auth/resend-confirmation.md

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+# User Authentication Flow — Resend Confirmation Email
+
+```mermaid
+--8<-- "diagrams/website/auth/resend-confirmation.mmd"
+```

docs/website/diagrams/auth/update-email.md

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+# User Authentication Flow — Update Email
+
+```mermaid
+--8<-- "diagrams/website/auth/update-email.mmd"
+```

docs/website/diagrams/auth/update-password.md

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+# User Authentication Flow — Update Password
+
+```mermaid
+--8<-- "diagrams/website/auth/update-password.mmd"
+```

docs/website/diagrams/auth/update-profile.md

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+# User Authentication Flow — Update Profile
+
+```mermaid
+--8<-- "diagrams/website/auth/update-profile.mmd"
+```

docs/website/diagrams/auth/update-username.md

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+# User Authentication Flow — Update Username
+
+```mermaid
+--8<-- "diagrams/website/auth/update-username.mmd"
+```