feat: converter accepts the constructs of goodluke and SaintlyCorruption

`init -490 screen`, `import x as y` and `from m import A as B`, classes with @renpy.pure, pickle hooks
on classes, `*` items in tuples and lists, generator functions (yield statements; the player runs them
to the end), multi-line expressions that need brackets, Null() and Animation() images, images given as
expressions (`"path/{}.png".format(x)`, f-strings), window statements in init, `offset` in ATL, input
widgets with their values and the focus/confirm actions, `continue` and `break` in screens, `drag`
and DiamondBox-style `fixed` with cell_size, `getattr(...)()` calls, transforms called with arguments,
and the whitelist for the new runtime. JSON files of a game are shipped as data files. Also fixes
blocking_names failing on a call of a call during full conversion.

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

backend/app/converter/screens.py

@@ -32,7 +32,7 @@ OPENERS = {"Show", "ShowTransient", "ToggleScreen", "Hide", "show_screen", "call
 
 CONTAINERS = {"fixed", "frame", "window", "vbox", "hbox", "grid", "vpgrid", "viewport", "button", "side", "nearrect",
               "drag"}
-LEAVES = {"text", "label", "textbutton", "imagebutton", "add", "image", "null", "bar", "vbar", "mousearea"}
+LEAVES = {"text", "label", "textbutton", "imagebutton", "add", "image", "null", "bar", "vbar", "mousearea", "input"}
 POSITIONAL = {"side": 1, "text": 1, "label": 1, "textbutton": 1, "add": 1, "image": 1, "grid": 2}
 ATL_WORDS = {"pause", "repeat", "parallel", "choice", "block", "contains", "function", "time"}
 
@@ -50,11 +50,11 @@ BEHAVIOUR = set("""action alternate hovered unhovered sensitive tooltip focus_ma
 activate_sound focus keysym alt id modal zorder tag layer variant style style_prefix at value range
 adjustment changed mousewheel draggable scrollbars xinitial yinitial child_size edgescroll arrowkeys
 text_style properties substitute prefix suffix repeat style_group prefer_top preferred_side
-drag_name draggable droppable drag_handle drag_joined drag_offscreen""".split())
+drag_name draggable droppable drag_handle drag_joined drag_offscreen cell_size fit start_lower default allow exclude mask length copypaste pixel_width multiline""".split())
 # Scrolling widgets share state through adjustments; scrollbars are cosmetic in the browser
 IGNORED_PREFIXES = ("scrollbar_", "vscrollbar_", "bar_", "side_", "thumb_", "slider_", "vslider_", "left_gutter",
                     "right_gutter", "top_gutter", "bottom_gutter")
-IGNORED = {"base_bar", "subpixel", "roll_forward", "xadjustment", "yadjustment", "pagekeys", "unscrollable", "arrowkeys", "edgescroll",
+IGNORED = {"capture", "axis", "key_events", "base_bar", "subpixel", "roll_forward", "xadjustment", "yadjustment", "pagekeys", "unscrollable", "arrowkeys", "edgescroll",
            "child_size", "mouse", "alt", "properties", "substitute", "prefix", "suffix", "keysym"}
 STATE_PREFIXES = ("idle", "hover", "insensitive", "selected", "selected_idle", "selected_hover",
                   "selected_insensitive")
@@ -208,6 +208,8 @@ class ScreenParser:
                 node = self.use(line, words)
                 if node:
                     nodes.append(node)
+            elif first in ("continue", "break"):
+                nodes.append({"c": first})
             elif first == "transclude":
                 nodes.append({"c": "transclude"})
             elif first == "pass":
@@ -222,8 +224,10 @@ class ScreenParser:
                 i = len(lines)
             elif first == "python" and line.text.strip() == "python:" or first == "$":
                 nodes.extend(self.python(line, first))
-            elif first == "default":
+            elif first == "default" and "=" in text:
                 self.default(line)
+            elif first == "default":  # `default "Bob"` inside an input: its starting text
+                props.update(self.properties(words, line))
             elif first == "key":
                 node = self.key(line, words)
                 if node:
@@ -391,6 +395,8 @@ class ScreenParser:
             return None
         if kind in ("bar", "vbar"):
             props["vertical"] = {"k": "const", "v": kind == "vbar"}
+        if kind == "fixed" and "cell_size" in props:  # the game's DiamondBox (decompiled as a plain `fixed`)
+            kind = "diamondbox"
         node: Node = {"w": kind, "args": args, "props": props, "body": body}
         if conditional:
             node["propIf"] = conditional
@@ -419,6 +425,8 @@ class ScreenParser:
                 if cond is not None:
                     return {"choose": {"c": cond, "then": self.at_ref(ast.unparse(tree.body), line),
                                        "else": self.at_ref(ast.unparse(tree.orelse), line)}}
+        if text == "None":
+            return {}
         if re.fullmatch(r"[A-Za-z_]\w*(?:\.\w+)*\[[^\]]+\]|[A-Za-z_]\w*\.\w+", text):  # `icon["at"]`, `item.at`
             dynamic = self.expr(text, line)
             if dynamic is not None: