feat: integrate m3ta-home for centralized user profiles

hosts/common/users/m3tam3re.nix

@@ -1,11 +1,57 @@
+# hosts/common/users/m3tam3re.nix — Central user definition with m3ta-home integration.
+#
+# This module:
+#   1. Creates the m3tam3re NixOS user
+#   2. Loads the m3ta-home profile system via mkHome
+#   3. Sets per-host feature flags based on a host profile mapping
+#   4. Imports per-host home.nix overrides (monitors, HW-specific config)
 {
   config,
   pkgs,
   inputs,
   ...
-}: {
+}: let
+  hostname = config.networking.hostName;
+
+  # ── Per-host profile mapping ──
+  # Determines which m3ta-home context and sets each host gets.
+  # To add a new host: add an entry here + create hosts/<hostname>/home.nix if needed.
+  hostProfiles = {
+    m3-ares = {
+      context = "desktop";
+      sets = ["coding" "gaming" "media"];
+    };
+    m3-kratos = {
+      context = "desktop";
+      sets = ["coding" "gaming" "media"];
+    };
+    m3-atlas = {
+      context = "server";
+      sets = ["coding"];
+    };
+    m3-helios = {
+      context = "server";
+      sets = [];
+    };
+    m3-hermes = {
+      context = "server";
+      sets = [];
+    };
+    m3-aether = {
+      context = "server";
+      sets = [];
+    };
+  };
+
+  profile = hostProfiles.${hostname} or {context = "server"; sets = [];};
+  m3ta-lib = inputs.m3ta-home.lib;
+
+  # Check if a per-host home.nix exists
+  hostHomeFile = ./../../${hostname}/home.nix;
+  hostHomeExists = builtins.pathExists hostHomeFile;
+in {
+  # ── NixOS user definition ──
   users.users.m3tam3re = {
-    #initialHashedPassword = "$y$j9T$IoChbWGYRh.rKfmm0G86X0$bYgsWqDRkvX.EBzJTX.Z0RsTlwspADpvEF3QErNyCMC";
     password = "12345";
     isNormalUser = true;
     description = "m3tam3re";
@@ -29,6 +75,119 @@
     ];
     packages = [inputs.home-manager.packages.${pkgs.stdenv.hostPlatform.system}.default];
   };
-  home-manager.users.m3tam3re =
-    import ../../../home/m3tam3re/${config.networking.hostName}.nix;
+
+  # ── Home-Manager configuration via m3ta-home ──
+  home-manager.users.m3tam3re = {
+    imports =
+      [
+        # Load m3ta-home composition engine
+        (m3ta-lib.mkHome {
+          user = "m3tam3re";
+          identity = "private";
+          inherit (profile) context sets;
+        })
+      ]
+      # Per-host feature flag overrides
+      ++ (
+        if hostname == "m3-ares" || hostname == "m3-kratos"
+        then [
+          # Desktop feature flags (both desktop hosts are identical)
+          {
+            base = {
+              shell = {
+                fish.enable = true;
+                nushell.enable = true;
+                starship.enable = true;
+              };
+              cliTools = {
+                fzf.enable = true;
+                nitch.enable = true;
+                television.enable = true;
+              };
+              secrets.enable = true;
+            };
+            desktop = {
+              wm = {
+                hyprland.enable = true;
+                rofi.enable = true;
+                wayland.enable = true;
+              };
+              apps = {
+                crypto.enable = true;
+                obsidian.enable = true;
+                office.enable = true;
+              };
+              theme = {
+                fonts.enable = true;
+                wallpapers.enable = true;
+              };
+            };
+            coding = {
+              editors = {
+                neovim.enable = true;
+                zed.enable = true;
+              };
+              lsp.enable = true;
+              packages.enable = true;
+              languages = {
+                python.enable = true;
+                javascript.enable = true;
+                rustToolchain.enable = true;
+                go.enable = true;
+                typescript.enable = true;
+              };
+            };
+            profiles.gaming = {
+              steam.enable = true;
+              gamescope.enable = true;
+            };
+            profiles.media = {
+              obs.enable = true;
+              ffmpeg.enable = true;
+              kdenlive.enable = true;
+              ytDlp.enable = true;
+            };
+          }
+        ]
+        else if hostname == "m3-atlas"
+        then [
+          {
+            base = {
+              shell = {
+                nushell.enable = true;
+                starship.enable = true;
+              };
+              cliTools = {
+                fzf.enable = true;
+                nitch.enable = true;
+                zellij.enable = true;
+              };
+            };
+            coding.editors.neovim.enable = true;
+          }
+        ]
+        else
+          # m3-helios, m3-hermes, m3-aether — minimal server
+          [
+            {
+              base = {
+                shell = {
+                  fish.enable = true;
+                  starship.enable = true;
+                };
+                cliTools = {
+                  fzf.enable = true;
+                  nitch.enable = true;
+                };
+              };
+            }
+          ]
+      )
+      # Per-host home.nix (Hyprland monitors, HW-specific overrides)
+      ++ (
+        if hostHomeExists
+        then [hostHomeFile]
+        else []
+      );
+  };
 }