refactor for shared states and multi chapters

assets/js/games/scenes/system-shutdown-1999/config.js

@@ -0,0 +1,89 @@
+// Series configuration for System Shutdown: 1999
+window.SystemShutdown1999Config = {
+  seriesId: "system-shutdown-1999",
+  name: "System Shutdown: 1999",
+
+  // Chapter definitions
+  chapters: [
+    {
+      number: 1,
+      id: "system-shutdown-1999-chapter-1",
+      command: "dial",
+      date: "1999-12-26",
+      title: "Boxing Day",
+      description: "Connect to Dark Tower BBS - December 26, 1999",
+    },
+    {
+      number: 2,
+      id: "system-shutdown-1999-chapter-2",
+      command: "dial2",
+      date: "1999-12-27",
+      title: "Day 2",
+      description: "The day after - December 27, 1999",
+    },
+    {
+      number: 3,
+      id: "system-shutdown-1999-chapter-3",
+      command: "dial3",
+      date: "1999-12-28",
+      title: "Day 3",
+      description: "Three days remain - December 28, 1999",
+    },
+    {
+      number: 4,
+      id: "system-shutdown-1999-chapter-4",
+      command: "dial4",
+      date: "1999-12-29",
+      title: "Day 4",
+      description: "Two days remain - December 29, 1999",
+    },
+    {
+      number: 5,
+      id: "system-shutdown-1999-chapter-5",
+      command: "dial5",
+      date: "1999-12-30",
+      title: "Day 5",
+      description: "The eve - December 30, 1999",
+    },
+    {
+      number: 6,
+      id: "system-shutdown-1999-chapter-6",
+      command: "dial6",
+      date: "1999-12-31",
+      title: "New Year's Eve",
+      description: "The final night - December 31, 1999",
+    },
+  ],
+
+  // Shared state schema with defaults
+  // These values persist across all chapters
+  sharedStateDefaults: {
+    // Completion tracking
+    chapters_completed: [],
+
+    // Core cross-chapter decisions
+    downloaded_cascade: false,
+    talked_to_sysop: false,
+    deleted_corrupted_file: false,
+    route_taken: null, // "immediate" | "cautious" | "ignored"
+
+    // World state changes (persist across chapters)
+    archives_deleted: false,
+    corrupted_file_deleted: false,
+
+    // Discovery flags
+    found_number: false,
+    dialed_lighthouse: false,
+    seen_archive_glitch: false,
+  },
+
+  // Helper to get chapter by number
+  getChapter(number) {
+    return this.chapters.find((c) => c.number === number);
+  },
+
+  // Helper to get next chapter
+  getNextChapter(currentNumber) {
+    return this.chapters.find((c) => c.number === currentNumber + 1);
+  },
+};