feat(renovate): update schedules to Saturday afternoon

- lockFileMaintenance: Saturday 2-4pm (was Monday 5am)
- nix-stable-ecosystem: Saturday 2-4pm
- nix-unstable-ecosystem: Saturday 2-4pm
- Add nixpkgs-qt rule: Saturday 4-6pm (staggered)

This allows CI builds to run overnight Saturday→Sunday, with human
review Saturday evening and builds complete by Sunday morning.

Closes: x-ymkgu

.gitea/workflows/ci.yml

@@ -18,50 +18,3 @@ jobs:
         run: nix flake check
         env:
           NIX_CONFIG: "access-tokens = git.johnogle.info=${{ secrets.GITEA_ACCESS_TOKEN }}"
-
-  build-and-cache:
-    runs-on: ubuntu-latest
-    needs: check
-    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    strategy:
-      fail-fast: false
-      matrix:
-        machine:
-          - nix-book
-          - boxy
-          - zix790prors
-          - nix-deck
-          - john-endesktop
-          - live-usb
-    steps:
-      - uses: actions/checkout@v6
-
-      - uses: https://git.johnogle.info/johno/gitea-actions/nix-setup@v1
-
-      - name: Build ${{ matrix.machine }}
-        id: build
-        run: |
-          OUT_PATH=$(nix build .#nixosConfigurations.${{ matrix.machine }}.config.system.build.toplevel --no-link --print-out-paths)
-          echo "out_path=$OUT_PATH" >> "$GITHUB_OUTPUT"
-        env:
-          NIX_CONFIG: "access-tokens = git.johnogle.info=${{ secrets.GITEA_ACCESS_TOKEN }}"
-
-      - name: Sign and push to cache
-        run: |
-          # Write signing key
-          echo "${{ secrets.NIX_SIGNING_KEY }}" > /tmp/signing-key
-          chmod 600 /tmp/signing-key
-
-          # Sign the closure
-          nix store sign --key-file /tmp/signing-key -r "${{ steps.build.outputs.out_path }}"
-
-          # Setup SSH key for cache push
-          mkdir -p ~/.ssh
-          echo "${{ secrets.CACHE_SSH_KEY }}" > ~/.ssh/cache_key
-          chmod 600 ~/.ssh/cache_key
-          ssh-keyscan -H ${{ secrets.CACHE_HOST }} >> ~/.ssh/known_hosts 2>/dev/null || true
-
-          # Push to cache
-          nix copy --to "ssh-ng://${{ secrets.CACHE_USER }}@${{ secrets.CACHE_HOST }}?ssh-key=$HOME/.ssh/cache_key" "${{ steps.build.outputs.out_path }}"
-        env:
-          NIX_CONFIG: "access-tokens = git.johnogle.info=${{ secrets.GITEA_ACCESS_TOKEN }}"

flake.lock

@@ -258,22 +258,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-qt": {
-      "locked": {
-        "lastModified": 1770464364,
-        "narHash": "sha256-z5NJPSBwsLf/OfD8WTmh79tlSU8XgIbwmk6qB1/TFzY=",
-        "owner": "nixos",
-        "repo": "nixpkgs",
-        "rev": "23d72dabcb3b12469f57b37170fcbc1789bd7457",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nixos",
-        "ref": "nixos-25.11",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "nixpkgs-unstable": {
       "locked": {
         "lastModified": 1769170682,
@@ -363,7 +347,6 @@
         "nix-darwin": "nix-darwin",
         "nix-doom-emacs-unstraightened": "nix-doom-emacs-unstraightened",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-qt": "nixpkgs-qt",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "perles": "perles",
         "plasma-manager": "plasma-manager",

flake.nix

@@ -4,9 +4,6 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
     nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
-    # Separate nixpkgs for qt5webengine-dependent packages (jellyfin-media-player, etc.)
-    # Updates on separate Renovate schedule to avoid massive qt rebuilds
-    nixpkgs-qt.url = "github:nixos/nixpkgs/nixos-25.11";
 
     nix-darwin = {
       url = "github:nix-darwin/nix-darwin/nix-darwin-25.11";
@@ -79,11 +76,6 @@
         config.allowUnfree = true;
         overlays = unstableOverlays;
       };
-      # Separate nixpkgs for qt5webengine-heavy packages to avoid rebuild churn
-      qt-pinned = import inputs.nixpkgs-qt {
-        system = prev.stdenv.hostPlatform.system;
-        config.allowUnfree = true;
-      };
       custom = prev.callPackage ./packages {};
       # Compatibility: bitwarden renamed to bitwarden-desktop in unstable
       bitwarden-desktop = prev.bitwarden-desktop or prev.bitwarden;