Update dependencies and bump Helium

Refresh flake.lock with newer revisions and hashes for packages.
Upgrade Helium AppImage to version 0.20.3.1.
Remove hyprland-qtutils from essentials package list.
Update Codex ponytail plugin to v5.3.3 with new SHA256 hash.

flake.lock

@@ -159,11 +159,11 @@
       },
       "locked": {
         "dir": "pkgs/firefox-addons",
-        "lastModified": 1793160255,
-        "narHash": "sha256-F1waPip2dUnsWIHveBjgacmUVmSJZChnhShWGNmSoYo=",
+        "lastModified": 1793419353,
+        "narHash": "sha256-UiTaJe+0zJK9a+aUrsdG8AqtSkbV1ltkFYtZLBrozuE=",
         "owner": "rycee",
         "repo": "nur-expressions",
-        "rev": "ed9233d15254387c12c5c53939ce2162712cf5fb",
+        "rev": "cba186973c89f9d54df352a790484de3e72425cb",
         "type": "gitlab"
       },
       "original": {
@@ -342,11 +342,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1793124281,
-        "narHash": "sha256-KdGTOgYXgMDA/ymTV10yLMt9tOjz9EmTgnTvaD+bhe4=",
+        "lastModified": 1793193205,
+        "narHash": "sha256-X6xa6sGA7RnJQuZGbFMC+K+KToWAlBDCCjJXfTwEPsw=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "1e3ebeb683d055d1675d3f64e6d2b186cb2ee504",
+        "rev": "095fef2f265c3c0da4fe315efba8f8a04495ab34",
         "type": "github"
       },
       "original": {
@@ -415,11 +415,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1793110635,
-        "narHash": "sha256-dhoW6VgFWlaodSY5jrBn+CF2FLmaUvDVgM7+C7T2+NM=",
+        "lastModified": 1793341285,
+        "narHash": "sha256-Y1CiZ4SoBUjLQyQM/pY+rS2dXD3CHLPstF0lmOc73D4=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "31ecbaca1bdefa45dffc409f0250bd8039ea0010",
+        "rev": "1c89083e451e891152365b799595cf7790a43325",
         "type": "github"
       },
       "original": {
@@ -451,11 +451,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1793158243,
-        "narHash": "sha256-krvMCWdwTEw0eMHm+YJajLSvlha4tDdieEZBumxBoZ8=",
+        "lastModified": 1793423963,
+        "narHash": "sha256-uFBOC6cKGUJhSdseWU8Y9GA8WakQYHgVubk6UEdl+/0=",
         "owner": "noctalia-dev",
         "repo": "noctalia-shell",
-        "rev": "490d327d7ecc2dc350649b78dca2143e93209f3d",
+        "rev": "f2cebd97e01657ea2581af099eb5c8c2e194fb80",
         "type": "github"
       },
       "original": {