fix(flathub): add npm cache configuration for offline builds (#39)

The Flatpak build was failing because npm couldn't find cached packages
during offline builds. This adds the required npm cache environment
variables to the manifest:

- XDG_CACHE_HOME: points to flatpak-node cache directory
- npm_config_cache: points to npm-cache from flatpak-node-generator
- npm_config_offline: ensures npm uses cached packages only

This fixes the ENOTCACHED error for packages like zustand during the
Flathub CI build.

Fixes flathub/flathub#7454

Co-authored-by: Thomas Marchand (agent) <agent@thomas.md>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: Th0rgal

.github/workflows/store-publish.yml

@@ -465,7 +465,10 @@ jobs:
             append-path: /usr/lib/sdk/rust-stable/bin:/usr/lib/sdk/node20/bin
             env:
               CARGO_HOME: /run/build/shard-launcher/cargo
+              XDG_CACHE_HOME: /run/build/shard-launcher/flatpak-node/cache
+              npm_config_cache: /run/build/shard-launcher/flatpak-node/npm-cache
               npm_config_nodedir: /usr/lib/sdk/node20
+              npm_config_offline: 'true'
 
           modules:
             # Install OpenJDK 21 for running Minecraft

desktop/package.json

@@ -1,7 +1,7 @@
 {
   "name": "shard-ui",
   "private": true,
-  "version": "0.1.16",
+  "version": "0.1.17",
   "type": "module",
   "scripts": {
     "dev": "vite",

desktop/src-tauri/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "shard_ui"
-version = "0.1.16"
+version = "0.1.17"
 description = "Shard launcher UI"
 authors = ["you"]
 edition = "2021"

desktop/src-tauri/tauri.conf.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2.0.2",
   "productName": "Shard Launcher",
-  "version": "0.1.16",
+  "version": "0.1.17",
   "identifier": "sh.shard.launcher",
   "build": {
     "beforeDevCommand": "bun run dev",

launcher/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "shard"
-version = "0.1.16"
+version = "0.1.17"
 edition = "2024"
 description = "A minimal, content-addressed Minecraft launcher"
 license = "MIT"