feat: Introduce core game systems for special tile effects, power-up management, player movement, and initial UI screens.

launcher/server/version.json

@@ -1,8 +1,28 @@
 {
-    "latest_version": "1.0.0",
-    "minimum_launcher_version": "1.0.0",
-    "minimum_app_version": "1.0.0",
+    "latest_version": "0.9.0",
+    "minimum_launcher_version": "0.9.0",
+    "minimum_app_version": "0.9.0",
     "releases": [
+        {
+            "version": "0.9.0",
+            "date": "2026-03-09",
+            "pck_windows": {
+                "url": "https://your-host.com/releases/tekton-local-0.9.0-windows.pck",
+                "size": 52428800,
+                "checksum_md5": "",
+                "checksum_sha256": ""
+            },
+            "changelog": [
+                "Power-up spawning before countdown in Stop n Go",
+                "Fixed safe zone visuals persistence",
+                "Unified Game Over freeze for bots and players",
+                "Added wall overlap protection for spawned tiles",
+                "Restricted bot tile collection to current standing tile",
+                "Improved door visibility in Tekton Doors mode",
+                "Fixed knock logic when carrying a Tekton"
+            ],
+            "required": true
+        },
         {
             "version": "1.0.0",
             "date": "2025-12-10",