fix: tv-deploy as real script so direnv exposes it in PATH

shellHook functions are invisible to direnv; writeShellScriptBin
produces an actual binary added to packages.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

flake.nix

@@ -43,6 +43,15 @@
         sdkRoot = "${androidSdk}/libexec/android-sdk";
 
         fonts = with pkgs; [ noto-fonts dejavu_fonts freefont_ttf ];
+
+        tvDeploy = pkgs.writeShellScriptBin "tv-deploy" ''
+          set -euo pipefail
+          trap 'adb disconnect "$TV_IP:5555"' EXIT
+          adb connect "$TV_IP:5555"
+          for apk in app/build/outputs/apk/*/release/*.apk; do
+            adb install -r "$apk"
+          done
+        '';
       in
       {
         devShells.default = pkgs.mkShell {
@@ -52,6 +61,7 @@
             pkgs.gradle_9
             pkgs.imagemagick # banner/icon generation
             pkgs.android-tools # adb for sideloading
+            tvDeploy
           ] ++ fonts;
 
           ANDROID_HOME = sdkRoot;
@@ -64,15 +74,6 @@
           GRADLE_OPTS = "-Dorg.gradle.project.android.aapt2FromMavenOverride=${sdkRoot}/build-tools/${buildToolsVersion}/aapt2";
           FONTCONFIG_FILE = pkgs.makeFontsConf { fontDirectories = fonts; };
 
-          shellHook = ''
-            tv-deploy() (
-              trap 'adb disconnect "$TV_IP:5555"' EXIT
-              adb connect "$TV_IP:5555" || return 1
-              for apk in app/build/outputs/apk/*/release/*.apk; do
-                adb install -r "$apk" || return 1
-              done
-            )
-          '';
         };
       }
     );