Fix Bun availability in non-login non-interactive shells

/etc/profile.d/ is only sourced by login shells — bash -c, container exec, and
CI jobs skip it. Add symlinks in /usr/local/bin for bun/bunx to cover all
execution contexts. Also make the profile hook content-idempotent so stale
content is corrected on upgrade.

Author: AnExiledDev

.devcontainer/scripts/setup.sh

@@ -163,15 +163,24 @@ if [ "$SETUP_POSTSTART" = "true" ]; then
 fi
 
 # Fix Bun PATH — external feature only adds to ~/.bashrc (misses non-interactive shells)
-if [ -d "$HOME/.bun/bin" ] && [ ! -f /etc/profile.d/bun.sh ]; then
-    sudo tee /etc/profile.d/bun.sh > /dev/null <<'BUNEOF'
+if [ -d "$HOME/.bun/bin" ]; then
+    # Symlink bun binaries into /usr/local/bin for non-login, non-interactive shells (bash -c, exec)
+    for bin in bun bunx; do
+        if [ -x "$HOME/.bun/bin/$bin" ] && [ ! -e "/usr/local/bin/$bin" ]; then
+            sudo ln -sf "$HOME/.bun/bin/$bin" "/usr/local/bin/$bin"
+        fi
+    done
+    # Profile script sets BUN_INSTALL for login/interactive shells (content-idempotent)
+    if [ ! -f /etc/profile.d/bun.sh ] || ! grep -q 'BUN_INSTALL="\$HOME/.bun"' /etc/profile.d/bun.sh; then
+        sudo tee /etc/profile.d/bun.sh > /dev/null <<'BUNEOF'
 export BUN_INSTALL="$HOME/.bun"
 case ":${PATH}:" in
     *:"${BUN_INSTALL}/bin":*) ;;
     *) export PATH="${BUN_INSTALL}/bin:${PATH}" ;;
 esac
 BUNEOF
-    sudo chmod +x /etc/profile.d/bun.sh
+        sudo chmod 0644 /etc/profile.d/bun.sh
+    fi
 fi
 
 echo ""