fix(darwin+HM): align nixpkgs↔nix-darwin, force HM home path, dedupe nvim/tmux 🔧

- track nixpkgs at `github:NixOS/nixpkgs/nixpkgs-unstable` to pair with
  `nix-darwin/master`
- update lockfile inputs: flake-compat, home-manager, NixOS-WSL,
  nixpkgs, nixos-vscode-server
- darwin: wrap HM module in a function to access `lib` and
  `mkForce` `home.homeDirectory = "/Users/danny"` (and set username) to
  satisfy HM’s absolute-path requirement under root activation
- HM: comment out duplicated `home.username` / `home.homeDirectory` in
  `home/danny/home.nix`
- HM: remove `neovim` and `tmux` from `home.packages` (managed via
  `programs.*`), fixing conflicting `nvim` subpath error

nixos/flake.lock

@@ -3,11 +3,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1733328505,
-        "narHash": "sha256-NeCCThCEP3eCl2l/+27kNNK7QrwZB1IJCrXfrbv5oqU=",
+        "lastModified": 1747046372,
+        "narHash": "sha256-CIVLLkVgvHYbgI2UpXvIIBJ12HWgX+fjA8Xf8PUmqCY=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "ff81ac966bb2cae68946d5ed5fc4994f96d0ffec",
+        "rev": "9100a0f413b0c601e0533d1d94ffd501ce2e7885",
         "type": "github"
       },
       "original": {
@@ -41,11 +41,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1757385184,
-        "narHash": "sha256-LCxtQn9ajvOgGRbQIRUJgfP7clMGGvV1SDW1HcSb0zk=",
+        "lastModified": 1757443987,
+        "narHash": "sha256-T7E4CIsZBUzrUcPRyTG9FA2xd48MtbQ/HpIaaCfwZwc=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "26993d87fd0d3b14f7667b74ad82235f120d986e",
+        "rev": "d587e11cef9caa9484ed090eddc55f4c56908342",
         "type": "github"
       },
       "original": {
@@ -81,11 +81,11 @@
         "nixpkgs": "nixpkgs"
       },
       "locked": {
-        "lastModified": 1736095716,
-        "narHash": "sha256-csysw/Szu98QDiA2lhWk9seYOyCebeVEWL89zh1cduM=",
+        "lastModified": 1757427959,
+        "narHash": "sha256-p0i07rLfAMzJWYfsjFOXEtIWeS1EGVxJaCi9gfyCwRE=",
         "owner": "nix-community",
         "repo": "NixOS-WSL",
-        "rev": "63c3b4ed1712a3a0621002cd59bfdc80875ecbb0",
+        "rev": "785f1b67b6c53de088f640f2a7da50ca4b2d7161",
         "type": "github"
       },
       "original": {
@@ -97,32 +97,32 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1733384649,
-        "narHash": "sha256-K5DJ2LpPqht7K76bsxetI+YHhGGRyVteTPRQaIIKJpw=",
+        "lastModified": 1757068644,
+        "narHash": "sha256-NOrUtIhTkIIumj1E/Rsv1J37Yi3xGStISEo8tZm3KW4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "190c31a89e5eec80dd6604d7f9e5af3802a58a13",
+        "rev": "8eb28adfa3dc4de28e792e3bf49fcf9007ca8ac9",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
-        "ref": "nixos-24.05",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1737062831,
-        "narHash": "sha256-Tbk1MZbtV2s5aG+iM99U8FqwxU/YNArMcWAv6clcsBc=",
-        "owner": "nixos",
+        "lastModified": 1757034884,
+        "narHash": "sha256-PgLSZDBEWUHpfTRfFyklmiiLBE1i1aGCtz4eRA3POao=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5df43628fdf08d642be8ba5b3625a6c70731c19c",
+        "rev": "ca77296380960cd497a765102eeb1356eb80fed0",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
-        "ref": "nixos-unstable",
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -171,11 +171,11 @@
         "nixpkgs": "nixpkgs_3"
       },
       "locked": {
-        "lastModified": 1729422940,
-        "narHash": "sha256-DlvJv33ml5UTKgu4b0HauOfFIoDx6QXtbqUF3vWeRCY=",
+        "lastModified": 1753541826,
+        "narHash": "sha256-foGgZu8+bCNIGeuDqQ84jNbmKZpd+JvnrL2WlyU4tuU=",
         "owner": "nix-community",
         "repo": "nixos-vscode-server",
-        "rev": "8b6db451de46ecf9b4ab3d01ef76e59957ff549f",
+        "rev": "6d5f074e4811d143d44169ba4af09b20ddb6937d",
         "type": "github"
       },
       "original": {