feat: New theme + wire price adjustement

public/js/services/saveio.js

@@ -1,5 +1,6 @@
-// Export / import of a save as a JSON or TXT file (or pasted text).
+// Export / import of the save as a JSON or TXT file (or pasted text).
 // Works on every device: download via a Blob link, import via file input or paste.
+// The save is theme-independent: any export can be imported under any theme.
 
 import { sanitizeState, serializeState } from '../engine/state.js';
 
@@ -7,7 +8,7 @@ const GAME_ID = 'idle-clicker';
 const FORMAT = 1;
 
 export class ImportError extends Error {
-  /** @param {'empty'|'invalid'|'unknown_theme'|'wrong_game'} code */
+  /** @param {'empty'|'invalid'|'wrong_game'} code */
   constructor(code) {
     super(code);
     this.code = code;
@@ -15,12 +16,11 @@ export class ImportError extends Error {
 }
 
 /** The text a player downloads, copies or pastes back. */
-export function buildExport(themeId, state, now = Date.now()) {
+export function buildExport(state, now = Date.now()) {
   return JSON.stringify(
     {
       game: GAME_ID,
       format: FORMAT,
-      theme: themeId,
       exportedAt: new Date(now).toISOString(),
       state: JSON.parse(serializeState(state)),
     },
@@ -29,8 +29,8 @@ export function buildExport(themeId, state, now = Date.now()) {
   );
 }
 
-/** Validate imported text. Throws ImportError; never trusts the content. */
-export function parseImport(text, ctx, knownThemeIds) {
+/** Validate imported text and return a clean state. Throws ImportError; never trusts the content. */
+export function parseImport(text, ctx) {
   const trimmed = String(text ?? '').trim().replace(/^/, '');
   if (!trimmed) throw new ImportError('empty');
 
@@ -41,11 +41,10 @@ export function parseImport(text, ctx, knownThemeIds) {
     throw new ImportError('invalid');
   }
   if (data?.game !== GAME_ID || data.format !== FORMAT) throw new ImportError('wrong_game');
-  if (!knownThemeIds.includes(data.theme)) throw new ImportError('unknown_theme');
 
   const state = sanitizeState(data.state, ctx);
   if (!state) throw new ImportError('invalid');
-  return { themeId: data.theme, state };
+  return state;
 }
 
 export function downloadText(filename, text, mime = 'application/json') {