Initial commit: Theriapolis baseline at port/godot branch point

Captures the pre-Godot-port state of the codebase. This is the rollback
anchor for the Godot port (M0 of theriapolis-rpg-implementation-plan-godot-port.md).
All Phase 0 through Phase 6.5 work is included; Phase 7 is in flight.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

_design_handoff/character_creation/from_design/src/main.jsx

@@ -0,0 +1,32 @@
+/* Entry point — loads data, mounts app. */
+
+const Root = () => {
+  const [data, setData] = React.useState(null);
+  const [err, setErr] = React.useState(null);
+  const [tweaks, setTweak] = useTweaks(window.TweakDefaults);
+
+  React.useEffect(() => {
+    loadData().then(setData).catch(e => setErr(String(e)));
+  }, []);
+
+  // setTweaks accepts a partial object: {theme: 'dark', density: 'compact'}
+  const setTweaks = (patch) => {
+    Object.entries(patch).forEach(([k, v]) => setTweak(k, v));
+  };
+
+  if (err) return <div style={{padding: 40, color: "var(--seal)", fontFamily: "var(--serif-display)"}}>Failed to load codex: {err}</div>;
+  if (!data) return (
+    <div style={{padding: 80, textAlign: "center", fontFamily: "var(--serif-display)", fontStyle: "italic", color: "var(--ink-mute)"}}>
+      Unsealing the codex…
+    </div>
+  );
+
+  return (
+    <>
+      <App data={data} tweaks={tweaks} setTweaks={setTweaks} />
+      <TweaksWiring tweaks={tweaks} setTweaks={setTweaks} />
+    </>
+  );
+};
+
+ReactDOM.createRoot(document.getElementById("app")).render(<Root />);