Improve log rotation, early-exit find_bundle, fix uninstall orphaned backup

apply.sh: preserve two log generations (.1 and .2) on rotation so the
last two boots are always available for diagnosis.

patch_ui.py: find_bundle returns on the first matching JS file instead of
collecting all matches. The multi-match warning was dead weight — the Angular
Ivy compiler produces exactly one bundle and the WARNING path was unreachable
in practice.

uninstall.sh: restore an orphaned sitecustomize.py.pre-truecloud-patch when
sitecustomize.py itself has already been removed (e.g. manual deletion while
the backup survived). Prevents leaving ghost vendor files in site-packages.

patch/apply.sh

@@ -22,7 +22,9 @@ PATCH_DIR="/data/truecloud-patch"
 LOG="$PATCH_DIR/apply.log"
 
 # Rotate log at 512 KB to avoid unbounded growth on a system volume.
+# Keep one prior generation (.1) so the last two boots are always available.
 if [ -f "$LOG" ] && [ "$(wc -c < "$LOG")" -gt 524288 ]; then
+    [ -f "${LOG}.1" ] && mv "${LOG}.1" "${LOG}.2"
     mv "$LOG" "${LOG}.1"
 fi
 

patch/patch_ui.py

@@ -50,7 +50,6 @@ def find_bundle():
     if webui is None:
         return None, None, None
 
-    matches = []
     for root, _dirs, names in os.walk(webui):
         for name in sorted(names):          # deterministic order
             if not name.endswith(".js"):
@@ -60,25 +59,12 @@ def find_bundle():
                 with open(path, encoding="utf-8", errors="replace") as fh:
                     content = fh.read()
                 if FIND.search(content):
-                    matches.append((path, content))
+                    return webui, path, content
             except OSError:
                 continue
 
-    if not matches:
     return webui, None, None
 
-    if len(matches) > 1:
-        # Unexpected — log all matches so the operator can investigate.
-        print(
-            f"[truecloud-patch] WARNING: filterByProviders pattern found in "
-            f"{len(matches)} files; patching only the first."
-        )
-        for p, _ in matches:
-            print(f"[truecloud-patch]   {p}")
-
-    path, content = matches[0]
-    return webui, path, content
-
 
 def main():
     webui, path, content = find_bundle()

uninstall.sh

@@ -76,6 +76,15 @@ if [ -n "$SITE_PKG" ] && [ -f "$SITE_PKG/sitecustomize.py" ]; then
 else
     echo "  Not found (already removed or install didn't place it here)."
 fi
+
+# Handle orphaned backup when sitecustomize.py was removed (e.g. by a TrueNAS
+# update) but the .pre-truecloud-patch file survived in the same directory.
+if [ -n "$SITE_PKG" ] && [ ! -f "$SITE_PKG/sitecustomize.py" ] && \
+   [ -f "$SITE_PKG/sitecustomize.py.pre-truecloud-patch" ]; then
+    mv "$SITE_PKG/sitecustomize.py.pre-truecloud-patch" \
+       "$SITE_PKG/sitecustomize.py"
+    echo "  Restored orphaned sitecustomize.py backup"
+fi
 echo ""
 
 # ── Restore UI bundle ─────────────────────────────────────────────────────────