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/locales.py

@@ -8,6 +8,7 @@
 
 import hashlib
 import re
+from uuid import uuid4
 from collections import Counter, defaultdict
 from dataclasses import dataclass, field
 from pathlib import Path
@@ -90,20 +91,21 @@ def assign_ids(modules: dict[str, list[dict[str, Any]]]) -> dict[tuple[str, int]
     by_line: dict[tuple[str, int], dict] = {}
     used: Counter = Counter()
     for file, labels in modules.items():
-        n = 0
         for label in labels:
+            label.setdefault("id", str(uuid4()))
             group = label["name"]
             for node in walk(label["body"]):
-                n += 1
-                node["id"] = short_hash(f"{file}:{n}")
+                node.setdefault("id", str(uuid4()))
+                for branch in node.get("branches", []) + node.get("items", []):
+                    branch.setdefault("id", str(uuid4()))
                 if node.get("op") == "label":
                     group = node["name"]
-                if node.get("op") != "say":
+                if node.get("op") not in {"say", "nani_add_choice"}:
                     continue
                 # Ren'Py style: <label>_<hash of the line>, de-duplicated
                 base = f"{group}_{short_hash((node.get('who') or '') + chr(0) + node['what'])}"
                 used[base] += 1
-                node["tid"] = base if used[base] == 1 else f"{base}_{used[base] - 1}"
+                node.setdefault("tid", base if used[base] == 1 else f"{base}_{used[base] - 1}")
                 node["_group"] = group
                 if "_ln" in node:
                     by_line[(file, node["_ln"])] = node