flake.lock: Update

Flake lock file updates:

• Updated input 'homepage':
    'git+https://git.posixlycorrect.com/fabian/homepage.git?ref=refs/heads/master&rev=5bd6a081d599e62231779c334ab7cd7227881d55' (2025-09-19)
  → 'git+https://git.posixlycorrect.com/fabian/homepage.git?ref=refs/heads/master&rev=7e9c71caeb2edb1c8d66fe80f3822cc1b60f1ef8' (2025-09-21)

flake.lock

@@ -238,11 +238,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1758235861,
+        "lastModified": 1758437510,
-        "narHash": "sha256-91Gvygx8kbSmli10SPr9KbV1Uz5cz2JZ9s/EdjFtRRw=",
+        "narHash": "sha256-ROmZ5/8dljFeho4dsNAs0PM0zuKBzcT5pXBFZpprL0I=",
         "ref": "refs/heads/master",
-        "rev": "be5ce1122f40801803f9455a4e0de55f68876645",
+        "rev": "7e9c71caeb2edb1c8d66fe80f3822cc1b60f1ef8",
-        "revCount": 64,
+        "revCount": 67,
         "type": "git",
         "url": "https://git.posixlycorrect.com/fabian/homepage.git"
       },

sys/platforms/vps/srv/default.nix

@@ -20,5 +20,6 @@ with lib; {
     ./dufs.nix
     ./isso.nix
     ./miniflux.nix
+    ./radicale.nix
   ];
 }

sys/platforms/vps/srv/radicale.nix

@@ -0,0 +1,41 @@
+{
+  lib,
+  pkgs,
+  ...
+}:
+with lib; {
+  services = {
+    nginx = {
+      virtualHosts."dav.posixlycorrect.com" = {
+        enableACME = true;
+        forceSSL = true;
+        extraConfig = ''
+          proxy_headers_hash_max_size 512;
+          proxy_headers_hash_bucket_size 128;
+        '';
+        locations."/" = {
+          proxyPass = "http://127.0.0.1:5232";
+        };
+      };
+    };
+
+    radicale = {
+      enable = true;
+      settings = {
+        server = {
+          hosts = [ "127.0.0.1:5232" ];
+        };
+        auth = {
+          type = "htpasswd";
+          htpasswd_filename = "/var/trust/radicale/htpasswd";
+          htpasswd_encryption = "bcrypt";
+        };
+        storage = {
+          filesystem_folder = "/var/lib/radicale/collections";
+        };
+        web.type = "internal";
+        rights.type = "authenticated";
+      };
+    };
+  };
+}