Merge remote; add nix auto-GC and CLAUDE.md

Resolves conflict with upstream tmux/blender additions (already covered
by the per-program restructure). Adds weekly nix GC (--delete-older-than 7d),
store auto-optimise, and project CLAUDE.md.

home/programs/rustup.nix

@@ -1,4 +1,39 @@
 { pkgs, ... }:
 {
-  home.packages = [ pkgs.rustup ];
+  home.packages = with pkgs; [
+    rustup
+    sqlx-cli
+    openssl.dev
+
+    # Bevy / Wayland runtime deps
+    wayland
+    wayland-protocols
+    libxkbcommon
+    libGL
+    vulkan-loader
+    alsa-lib
+    udev
+    libx11
+    libxcursor
+    libxi
+    libxrandr
+    libxcb
+  ];
+
+  home.sessionVariables.PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
+
+  # ponytail: global LD_LIBRARY_PATH so `cargo run` finds these without a shell.nix
+  home.sessionVariables.LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (with pkgs; [
+    wayland
+    libxkbcommon
+    libGL
+    vulkan-loader
+    alsa-lib
+    udev
+    libx11
+    libxcursor
+    libxi
+    libxrandr
+    libxcb
+  ]);
 }