fix: set up paru PKGBUILD repo config in install hook

Ensures paru can find moongreet-git, moonlock-git, moonset-git on
every install/upgrade. Breaks the bootstrap loop where moonarch-git
couldn't update itself because the paru config it delivers was missing.

moonarch-git/moonarch.install

@@ -42,6 +42,18 @@ post_install() {
         fi
     done < /etc/passwd
 
+    # Ensure paru PKGBUILD repo is configured (breaks bootstrap loop otherwise)
+    PARU_CONF="/etc/paru.conf"
+    if [ -f "$PARU_CONF" ]; then
+        if ! grep -q 'Mode.*p' "$PARU_CONF" 2>/dev/null; then
+            sed -i '/^\[options\]/a Mode = arp' "$PARU_CONF"
+        fi
+        if ! grep -q '\[moonarch-pkgbuilds\]' "$PARU_CONF" 2>/dev/null; then
+            printf '\n[moonarch-pkgbuilds]\nUrl = https://gitea.moonarch.de/nevaforget/moonarch-pkgbuilds.git\n' \
+                >> "$PARU_CONF"
+        fi
+    fi
+
     # Cleanup legacy /usr/local/bin/ scripts from pre-package installs
     rm -f /usr/local/bin/moonarch-* 2>/dev/null || true
     rm -f /usr/local/bin/swww /usr/local/bin/swww-daemon 2>/dev/null || true