Update flake.lock and helium; fix fish venv alias

- Bump Firefox addons, home‑manager, nixpkgs, and noctalia-shell
  revisions in flake.lock
- Upgrade helium to 0.17.0.1 (updated hash)
- Adjust fish aliases to source .fish activation scripts

flake.lock

@@ -159,11 +159,11 @@
       },
       "locked": {
         "dir": "pkgs/firefox-addons",
-        "lastModified": 1788926592,
-        "narHash": "sha256-cHzKQBhQVLPfMCtK+E0EMeQpwW2/XA9l+8H6xXsT+70=",
+        "lastModified": 1789012949,
+        "narHash": "sha256-KBgLlh6RZxutLDtAF/s6hUYqlY2W4xtrfoL9H804LNs=",
         "owner": "rycee",
         "repo": "nur-expressions",
-        "rev": "9d230a63e1419b6efd95728f01a6a72e1986a03f",
+        "rev": "0a05d0d144297405cb33aed943b93612e3fcf3fa",
         "type": "gitlab"
       },
       "original": {
@@ -342,11 +342,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1788921139,
-        "narHash": "sha256-2wRuvf9UDw1SYWtBcxNmxLeAtNU1i/hc1c0AKQHdvlM=",
+        "lastModified": 1789047607,
+        "narHash": "sha256-TvkqeCjWyQvQs7jZ/2WcOWF1GMSgKtAP3qrw7eKpp1k=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "a2dbe7c2c9333e8234ae8114c7f731784201d108",
+        "rev": "f7f333f04ff6e2f94f955642a1b4956d4fcd3010",
         "type": "github"
       },
       "original": {
@@ -415,11 +415,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1788881743,
-        "narHash": "sha256-2V9GZGvPfrNzxFozhI9dcqV+c3QdA8YZrvAAzqEB+dI=",
+        "lastModified": 1789006805,
+        "narHash": "sha256-xB8mKMOx1IA9vTDNLmJZ6n4wCMq/cuWBBOzGCRnqxrU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d6524aaca2ff07876657ae2b323f24be4874944b",
+        "rev": "8ce4ef6cb6f871616146b9fe26d2a5ae594e94fe",
         "type": "github"
       },
       "original": {
@@ -451,11 +451,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1788886125,
-        "narHash": "sha256-5rgQFUGr8GXYyyuy8ynrN39WfZzSiO/wqGWjELBOkEY=",
+        "lastModified": 1789053136,
+        "narHash": "sha256-A7ehoEnAJw4k1Qwpr/WkOkLXWZAVU970uB+sm6nBxP0=",
         "owner": "noctalia-dev",
         "repo": "noctalia-shell",
-        "rev": "d6607b4eafbb92f6d494ebed3e296d4b741c0b58",
+        "rev": "c7b9197af77ff22bfb9a83c52a95643a1d90ca86",
         "type": "github"
       },
       "original": {