Initial lookbook implementation

Pinterest-style visual bookmarking app with:
- URL metadata extraction (OG/Twitter meta, oEmbed fallback)
- Image caching in Postgres with 480px thumbnails
- Multi-tag filtering with Ctrl/Cmd for OR mode
- Fuzzy tag suggestions and inline tag editing
- Browser console auth() with first-use password setup
- Brutalist UI with Commit Mono font and Pico CSS
- Light/dark mode via browser preference

default.nix

@@ -0,0 +1,90 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let
+	lookbook = pkgs.buildGoModule {
+		pname = "lookbook";
+		version = "0.1.0";
+		src = ./.;
+
+		vendorHash = "sha256-ghF1GGGQokE0x/zC+AcAneF6ExPGWYQCZ/U6slvKbA4=";
+
+		env.GOPRIVATE = "git.soup.land";
+
+		subPackages = [ "cmd/server" ];
+
+		postInstall = ''
+			mv $out/bin/server $out/bin/lookbook
+		'';
+
+		meta = with pkgs.lib; {
+			description = "Lookbook inspiration board";
+			homepage = "https://git.soup.land/soup/lookbook";
+		};
+	};
+
+in
+{
+	package = lookbook;
+
+	nixosModule = { config, lib, pkgs, ... }:
+		let
+			cfg = config.services.lookbook;
+		in {
+			options.services.lookbook = {
+				enable = lib.mkEnableOption "lookbook service";
+
+				address = lib.mkOption {
+					type = lib.types.str;
+					default = "127.0.0.1:8083";
+					description = "Address to listen on";
+				};
+
+				databaseUrl = lib.mkOption {
+					type = lib.types.str;
+					description = "PostgreSQL connection URL";
+				};
+
+				user = lib.mkOption {
+					type = lib.types.str;
+					default = "lookbook";
+					description = "User to run the service as";
+				};
+
+				group = lib.mkOption {
+					type = lib.types.str;
+					default = "lookbook";
+					description = "Group to run the service as";
+				};
+			};
+
+			config = lib.mkIf cfg.enable {
+				users.users.${cfg.user} = {
+					isSystemUser = true;
+					group = cfg.group;
+				};
+				users.groups.${cfg.group} = {};
+
+				systemd.services.lookbook = {
+					description = "Lookbook App";
+					wantedBy = [ "multi-user.target" ];
+					after = [ "network.target" "postgresql.service" ];
+					requires = [ "postgresql.service" ];
+
+					environment = {
+						DATABASE_URL = cfg.databaseUrl;
+						ADDR = cfg.address;
+					};
+
+					serviceConfig = {
+						Type = "simple";
+						User = cfg.user;
+						Group = cfg.group;
+						ExecStartPre = "${lookbook}/bin/lookbook -migrate";
+						ExecStart = "${lookbook}/bin/lookbook web";
+						Restart = "always";
+						RestartSec = 5;
+					};
+				};
+			};
+		};
+}