feat: converter reads the Phone library's register statement, named stores and generators

`init phone register` becomes a default (the group chat) plus a function of library calls that runs with
the other defaults of a new game (phone_register.py). `init/python [early|hide] in some.store` wraps its
code in an in_store node and `default some.store.name` may name a store; yield works as an expression
(generator functions are marked gen); `import x as y`, `transform -150 name(...)`, `init:` with if/else,
`config.special_namespaces` lines, `at` lists and tuples, transforms made by Python functions, `choice`
weights that are expressions, `__len__`/`__bool__`, and the whitelist for os, calendar, itertools,
pygame_sdl2 and the new runtime. The converter also records the size of every picture it converts
(`imageSizes`) so `renpy.image_size` answers without loading.

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

backend/app/converter/compatibility.py

@@ -124,6 +124,16 @@ CALLS |= set(NATIVE_CLASSES)
 CALLS |= {"renpy.Render", "renpy.render", "renpy.redraw", "renpy.displayable", "renpy.IgnoreEvent",
           "renpy.display.layout.LiveComposite", "renpy.display.layout.Fixed", "pygame.key.get_mods",
           "pygame.mouse.get_pressed", "pygame.mouse.get_pos"}
+CALLS |= {"object", "anim.Blink", "ExplodeText", "MouseDisplayable", "ui.saybehavior", "renpy.display.layout.AdjustTimes",
+          "renpy.display.layout.Motion", "renpy.display.matrix.Matrix", "renpy.display.matrix.offset",
+          "renpy.display.matrix.rotate", "renpy.display.matrix.perspective", "renpy.display.matrix.texture_projection",
+          "renpy.display.matrix.screen_projection", "renpy.gl2.gl2mesh2.Mesh2.texture_rectangle", "get_power_info"}
+CALLS |= {"SnowBlossom", "chain", "itertools.chain", "calendar.Calendar", "calendar.monthrange", "calendar.isleap",
+          "os.listdir", "os.path.join", "os.path.basename", "os.path.dirname", "os.path.splitext", "os.path.exists",
+          "os.path.isfile", "time.gmtime", "time.localtime", "_preferences.set_volume", "_preferences.set_mute",
+          "Layer", "renpy.known_languages", "renpy.predict_screen", "renpy.predicting", "renpy.rollback",
+          "renpy.invoke_in_new_context", "renpy.add_layer", "renpy.show_layer_at", "renpy.filter_text_tags",
+          "renpy.text.text.Text", "renpy.easy.displayable_or_none", "renpy.easy.displayable"}
 CALLS |= {"ConditionSwitch", "DynamicImage", "renpy.register_sl_displayable", "renpy.capture_focus", "renpy.clear_capture_focus", "renpy.get_widget", "renpy.display.focus.set_focused",
           "renpy.file", "renpy.open_file", "loads", "dumps", "json.loads", "json.dumps", "Animation", "im.matrix", "renpy.context", "renpy.call_in_new_context", "renpy.get_focus_rect", "gui.rebuild", "FontGroup", "RenpyText",
           "MatrixColor", "im.Image", "im.AlphaMask", "GLMovie", "renpy.display.im.Image", "colorsys.rgb_to_hls",
@@ -158,6 +168,7 @@ SCREEN_CALLS |= set("""FileAction FileSave FileLoad FileDelete FileTakeScreensho
 FileLoadable FileUsedSlot FileNewest FileSaveName FileTime FileJson FileScreenshot FileCurrentScreenshot
 FileCurrentPage FilePageName FileSlotName""".split())
 SCREEN_CALLS |= {"renpy.translation.translate_string"}
+SCREEN_CALLS |= {"Skip", "Rollback", "ToggleLocalVariable", "Layer"}
 # Text fields and the actions around them (see InputValue in screens.ts)
 SCREEN_CALLS |= set("""VariableInputValue ScreenVariableInputValue FieldInputValue DictInputValue FilePageNameInputValue
 CurrentScreenName CaptureFocus ClearFocus InvertSelected UploadSync DownloadSync Confirm""".split())
@@ -186,7 +197,8 @@ METHODS = set("append extend insert pop remove index count reverse sort clear co
 
 METHODS |= NATIVE_METHODS
 # Methods of generators made by `renpy.random.Random()` / `random.Random()`
-METHODS |= {"add_style_property", "add_prefix_style_property", "add_pattern", "get_context", "read", "readlines", "close", "sub", "subn", "search", "match", "findall", "finditer", "split", "time", "_clear", "Enable", "Disable", "Toggle", "encode", "blit", "subpixel_blit", "fill", "canvas", "get_size", "add_shader", "add_uniform", "add_property",
+METHODS |= {"send", "_duplicate", "_unique", "set_child", "get_placement", "subsurface", "update_state",
+           "adjusted_times", "get_range", "interpolate", "from_iterable", "itermonthdays", "isnumeric", "isdecimal", "add_style_property", "add_prefix_style_property", "add_pattern", "get_context", "read", "readlines", "close", "sub", "subn", "search", "match", "findall", "finditer", "split", "time", "_clear", "Enable", "Disable", "Toggle", "encode", "blit", "subpixel_blit", "fill", "canvas", "get_size", "add_shader", "add_uniform", "add_property",
            "add_focus", "circle", "rect", "line", "lines", "polygon"}
 METHODS |= {"fullmatch", "hexdigest", "randint", "randrange", "random", "choice", "choices", "sample", "shuffle", "uniform"}
 
@@ -350,7 +362,8 @@ def mark_screen_calls(data) -> None:
         visit([live, data.defaults, [data.screens[n] for n in data.screen_used if n in data.screens]])
 
 
-IMPLICIT_METHODS = {"__init__", "__str__", "__repr__", "__hash__", "__eq__", "__iter__", "__getitem__", "__contains__"}
+IMPLICIT_METHODS = {"__init__", "__str__", "__repr__", "__hash__", "__eq__", "__iter__", "__getitem__", "__contains__", "__len__",
+                    "__bool__"}
 
 # Labels Ren'Py itself defines (renpy/common); jumping to them goes to the player's own menu
 ENGINE_LABELS = {"main_menu_screen", "_main_menu_screen", "main_menu"}