feat(portal): add service drawers and employee portal preview

www/integrations/nixos/README.md

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+# Inactive SOPS/age preparation, 2026-10-30
+
+The owner selected SOPS, age and sops-nix. This directory is a template, not a
+host configuration. The development flake remains unchanged. No real recipient,
+key, encrypted secret or server user is supplied. No module is deployed.
+
+Official references inspected for this pass:
+- [SOPS documentation](https://getsops.io/docs/)
+- [sops-nix installation and secret permissions](https://github.com/Mic92/sops-nix)
+
+SOPS encrypts configuration at rest. sops-nix can supply decrypted values at
+runtime under `/run/secrets` with explicit owners and modes. This does not make
+browser ciphertext or publicly served documents private.
+
+## Owner setup before activation
+
+1. Supply the actual NixOS topology, host flake, deploy user, persisted key
+   location, backup owner, HTTPS termination and resource-service identity.
+2. Pin a reviewed `github:Mic92/sops-nix` input in that host flake; import
+   `inputs.sops-nix.nixosModules.sops` and the reviewed template. Do not add the
+   input to the Astro development flake just to evaluate a deployment sketch.
+3. The owner generates independent developer/recovery and VPS age identities in
+   private terminals. Record only public recipients in the reviewed SOPS
+   creation rule. Use distinct recipients, never a placeholder recipient. Keep
+   the VPS private identity on persistent root-controlled storage (0600), outside
+   `/nix/store`, Git, the public static root and CI artifacts.
+4. Encrypt the approved credential material using SOPS with both recipients.
+   Review recipient access, least privilege and an offline recovery copy. SOPS
+   encrypted files may enter a deployment repository only after owner approval.
+5. Set `aia.portalSecrets` options explicitly, then evaluate the complete host
+   configuration and test decryption on authorized nonproduction infrastructure.
+   Runtime consumers use the generated `.path`, not Nix evaluation of plaintext.
+6. Decide which service reloads after rotation. Rotate application credentials
+   as well as SOPS recipients when revoking access: rewrapping alone does not
+   invalidate an already copied password. Test recovery and key restoration.
+
+## Separate staff and management resource authorization
+
+Keep original documents outside Astro `public`, `dist`, release archives and
+CDN roots. Proposed delivery namespaces are `/staff-resources/` and
+`/management-resources/`; neither is implemented or considered working here.
+Use nginx `auth_request` to an approved authorization service or an equivalent
+server-enforced policy with individually revocable identities and staff and
+management roles. Staff credentials must not authorize management resources;
+management access to staff resources must be an explicit policy. Backend file
+locations must be internal, inaccessible through static aliases or alternate
+paths. Never trust a browser-provided role header.
+
+A separate shared Basic Auth credential file per namespace can be considered
+only as an explicitly approved weaker interim model, not identity management or
+automatic role inheritance. The template prepares separate secret inputs without
+selecting that access model or installing an identity provider.
+
+Use HTTPS, `Cache-Control: private, no-store`, no shared/CDN caching, and
+`Referrer-Policy: no-referrer` for protected delivery. Avoid credentials and
+sensitive resource paths in access/error logs; review monitoring and backups.
+Authorization failures must fail closed, including at proxy/cache boundaries.
+Test direct requests, alternate encodings, role crossover and rollback.
+
+## Distinct boundaries and release checks
+
+- SOPS: deployment secrets at rest and controlled runtime access.
+- Portal HTML: shared-code browser decryption, offline-guessable access friction.
+- Documents: require server authorization even if URLs are encrypted in the UI.
+
+The compatibility preview cannot grant production portal access. Before cutover,
+classify every document, implement and verify its delivery destination, rewrite
+and re-encrypt links, test two-view separation, rotate shared codes privately,
+check the public artifact for private files, and obtain owner/security approval.
+Back up encrypted configuration and documents separately from keys; rehearse
+restore and rollback. Revoking a static release cannot retract ciphertext or
+files already downloaded by visitors. Site cutover is still unauthorized.

www/integrations/nixos/portal-secrets.nix

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+# INACTIVE TEMPLATE. Not imported by the development flake or any deployed host.
+# Requires an owner-reviewed sops-nix NixOS module import in the host flake.
+{ config, lib, ... }:
+let cfg = config.aia.portalSecrets;
+in {
+  options.aia.portalSecrets = {
+    enable = lib.mkEnableOption "owner-reviewed portal deployment secrets";
+    encryptedFile = lib.mkOption { type = lib.types.path; description = "SOPS-encrypted YAML only; never a plaintext file"; };
+    ageKeyFile = lib.mkOption { type = lib.types.str; description = "Private persisted host age key path outside the Nix store"; };
+    readerUser = lib.mkOption { type = lib.types.str; description = "Approved resource authorization service user"; };
+  };
+  config = lib.mkIf cfg.enable {
+    assertions = [{ assertion = lib.hasPrefix "/" cfg.ageKeyFile && !(lib.hasPrefix "/nix/store/" cfg.ageKeyFile);
+      message = "The host age identity must be an absolute runtime path outside the Nix store."; }];
+    sops.defaultSopsFile = cfg.encryptedFile;
+    sops.age.keyFile = cfg.ageKeyFile;
+    sops.age.generateKey = false;
+    sops.age.sshKeyPaths = [];
+    sops.gnupg.sshKeyPaths = [];
+    sops.secrets."portal/staff-credentials" = { owner = cfg.readerUser; mode = "0400"; };
+    sops.secrets."portal/management-credentials" = { owner = cfg.readerUser; mode = "0400"; };
+    # Consumers reference config.sops.secrets.<name>.path at runtime.
+    # Do not use builtins.readFile on a decrypted secret, environment.etc.text,
+    # PUBLIC_* values, or Astro/Vite imports to transport secrets.
+  };
+}