feat: implement modular foundation and core system services

- Update flake.nix with 25.11 release and core inputs
- Add dedicated modules for audio (Pipewire), bluetooth, and networking
- Update GEMINI.md with the new Modular Merging Architecture blueprint
- Configure graphical installer ISO and test VM outputs

modules/home/theme-switcher.nix

@@ -9,7 +9,13 @@ let
     STATE_DIR="$HOME/.config/home-manager"
     THEME_STATE_FILE="$STATE_DIR/theme-state.nix"
     WALLPAPER_STATE_FILE="$STATE_DIR/wallpaper-state.nix"
-    THEMES_DIR="/etc/nixos/themes" # This depends on where the repo is cloned
+    if [ -d "/etc/nixos/nomarchy/themes" ]; then
+      THEMES_DIR="/etc/nixos/nomarchy/themes"
+    elif [ -d "/etc/nomarchy/themes" ]; then
+      THEMES_DIR="/etc/nomarchy/themes"
+    else
+      THEMES_DIR="/etc/nixos/themes"
+    fi # This depends on where the repo is cloned
     
     mkdir -p "$STATE_DIR"
     
@@ -24,6 +30,7 @@ let
         BG=$(ls "$BG_DIR" | head -n 1)
         if [ -n "$BG" ]; then
           echo "$BG_DIR/$BG" > "$WALLPAPER_STATE_FILE"
+          swww img "$BG_DIR/$BG" --transition-type outer --transition-pos 0.85,0.97 --transition-step 90 &
         fi
       fi
       
@@ -48,7 +55,13 @@ let
   nomarchy-wallpaper-selector = pkgs.writeShellScriptBin "nomarchy-wallpaper-selector" ''
     STATE_DIR="$HOME/.config/home-manager"
     WALLPAPER_STATE_FILE="$STATE_DIR/wallpaper-state.nix"
-    THEMES_DIR="/etc/nixos/themes"
+    if [ -d "/etc/nixos/nomarchy/themes" ]; then
+      THEMES_DIR="/etc/nixos/nomarchy/themes"
+    elif [ -d "/etc/nomarchy/themes" ]; then
+      THEMES_DIR="/etc/nomarchy/themes"
+    else
+      THEMES_DIR="/etc/nixos/themes"
+    fi
     
     mkdir -p "$STATE_DIR"
     
@@ -58,6 +71,7 @@ let
     
     if [ -n "$SELECTED_WP" ]; then
       echo "$SELECTED_WP" > "$WALLPAPER_STATE_FILE"
+      swww img "$SELECTED_WP" --transition-type outer --transition-pos 0.85,0.97 --transition-step 90 &
       env-update
     fi
   '';