feat: _() strings and screen texts become translatable strings; search looks in all states; stutter hint

show text _("...") and literal screen texts are listed in Names and menu; typing in search switches the filter from To do to All; the translator is told how stutters are spelled.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

backend/app/translation.py

@@ -62,6 +62,39 @@ class TextIndex:
     modules: list[tuple[str, int]] = field(default_factory=list)
 
 
+_WORD = re.compile(r"[^\W\d_]")
+_SCREEN_TEXT = {"text", "textbutton", "label"}
+
+
+def marked_strings(value: Any) -> list[str]:
+    """Texts that Ren'Py translates by their source: ``_("...")`` and the literal text of screen widgets.
+
+    ``show text _("...")``, ``$ x = _("...")`` and screen ``text "..."`` carry no dialogue id, so they
+    are keyed by the text itself, like menu items. Strings without a letter (numbers, markup) are skipped.
+    """
+    out: list[str] = []
+    stack = [value]
+    while stack:
+        item = stack.pop()
+        if isinstance(item, list):
+            stack.extend(reversed(item))
+            continue
+        if not isinstance(item, dict):
+            continue
+        func = item.get("f")
+        if (item.get("k") == "call" and isinstance(func, dict) and func.get("k") == "name"
+                and func.get("id") in ("_", "__") and len(item.get("a") or []) == 1):
+            arg = item["a"][0]
+            if isinstance(arg, dict) and arg.get("k") == "const" and isinstance(arg.get("v"), str):
+                out.append(arg["v"])
+        if item.get("w") in _SCREEN_TEXT and item.get("args"):
+            arg = item["args"][0]
+            if isinstance(arg, dict) and arg.get("k") == "const" and isinstance(arg.get("v"), str):
+                out.append(arg["v"])
+        stack.extend(reversed(list(item.values())))
+    return [text for text in out if text.strip() and _WORD.search(text)]
+
+
 def text_index(manifest: dict[str, Any]) -> TextIndex:
     game_hash = manifest["files"]["game.json"]["hash"]
     game = blob_json(game_hash)
@@ -109,7 +142,11 @@ def _build_index(game_hash: str, scripts: tuple[tuple[str, str], ...]) -> TextIn
                     idx.lines.append(info)
                     idx.by_tid[info.tid] = info
                     count += 1
+        for text in marked_strings(module["labels"]):
+            idx.strings.setdefault(text, "text")
         idx.modules.append((path, count))
+    for text in marked_strings(game.get("screens") or {}):
+        idx.strings.setdefault(text, "text")
     return idx