feat: add mod editing, revision merges and secure game storage

Add immutable revisions, PGVN editor, asset replacement, merge and rebase workflows, authenticated media delivery and reachability GC. Harden the script interpreter, pin unrpyc and remove tracked build metadata. Include current compatibility checks, Naninovel import and regression tests.

backend/app/converter/pipeline.py

@@ -19,6 +19,7 @@ from app.converter.rpa import RpaError, extract_rpa
 from app.converter.rpy_lexer import ParseError
 from app.converter.rpy_parser import RpyParser, ScriptData
 from app.converter.rpyc import decompile_missing
+from app.converter.compatibility import CompatibilityError, Issue, audit_ir, detect, require_supported_scripts
 
 log = logging.getLogger(__name__)
 FORMAT = "pgvn/1"
@@ -46,12 +47,26 @@ def convert_archive(archive: Path, filename: str, work: Path, progress: Progress
     data = ScriptData()
 
     if archive.is_dir():
+        detection = detect(archive)
+        if detection.engine == "naninovel":
+            from app.converter.naninovel import convert_naninovel
+            return convert_naninovel(detection.root, work, progress)
+        # Inspect scripts before copying/converting multi-gigabyte media collections.
+        from app.converter.preflight import inspect_directory
+        inspect_directory(detection.root)
         progress("Копирование файлов игры")
         game_dir = src_root / "game"
         shutil.copytree(find_game_dir(archive), game_dir)
     else:
+        from app.converter.preflight import inspect_archive
+        progress("Проверка движка и сценариев до распаковки медиа")
+        inspect_archive(archive, filename)
         progress("Распаковка архива")
         extract(archive, filename, src_root)
+        detection = detect(src_root)
+        if detection.engine == "naninovel":
+            from app.converter.naninovel import convert_naninovel
+            return convert_naninovel(detection.root, work, progress)
         game_dir = find_game_dir(src_root)
 
     rpas = sorted(game_dir.rglob("*.rpa"))
@@ -79,6 +94,8 @@ def convert_archive(archive: Path, filename: str, work: Path, progress: Progress
             data.warn("Слишком глубокая вложенность", rel)
     if not any(lbl["name"] == "start" for labels in data.modules.values() for lbl in labels):
         raise RuntimeError("В скриптах не найдена метка start — нечего запускать")
+    audit_ir(data)
+    require_supported_scripts(data)
 
     files: dict[str, dict[str, Any]] = {}
     aliases: dict[str, str] = {}
@@ -112,6 +129,10 @@ def convert_archive(archive: Path, filename: str, work: Path, progress: Progress
             aliases[rel.lower()] = logical
             counts[assets.kind_of(p)] += 1
 
+    if failed:
+        raise CompatibilityError("renpy", [Issue("media_conversion", "Не удалось конвертировать обязательное медиа", name)
+                                            for name in failed])
+
     progress("Сборка формата PGVN")
     _auto_images(data, aliases)
     missing: set[str] = set()
@@ -176,6 +197,11 @@ def convert_archive(archive: Path, filename: str, work: Path, progress: Progress
 
     total = sum(f["size"] for f in files.values())
     report = {
+        "engine": "renpy",
+        "compatible": True,
+        "converterVersion": "pgvn-tools/2",
+        "unrpycRevision": (get_settings().unrpyc_path.parent / "REVISION").read_text().strip()
+            if (get_settings().unrpyc_path.parent / "REVISION").is_file() else "unavailable",
         "format": FORMAT,
         "durationSec": round(time.monotonic() - started, 1),
         "scripts": len(rpy_files),