release(v2.2.0): update firmware binaries, version string, manifest

- TIGERSCALE_FW_VERSION: "2.0.0" → "2.2.0" in main.cpp
- Web installer firmware binaries updated to v2.2.0 build (May 15):
  firmware.bin, littlefs.bin, bootloader.bin, partitions.bin, boot_app0.bin
- manifest.json: version "2.0.0" → "2.2.0", remove incorrect home_assistant_domain
- All 5 .bin files now consistent and up-to-date

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: BenGlut

src/main.cpp

@@ -141,7 +141,7 @@ const char* TIGERTAG_FIREBASE_WEB_API_KEY = "AIzaSyCkxPTs_Cv0KVLqsZj-UKWWqIY0Otf
 
 // Embedded build identity — exposed via /api/status and the heartbeat so the
 // app/Studio can compare against the latest published version.json.
-#define TIGERSCALE_FW_VERSION  "2.0.0"
+#define TIGERSCALE_FW_VERSION  "2.2.0"
 #ifndef TIGERSCALE_GIT_SHA
 #define TIGERSCALE_GIT_SHA     "dev"
 #endif

web-installer/manifest.json

@@ -1,7 +1,6 @@
 {
   "name": "TigerScale",
-  "version": "2.0.0",
-  "home_assistant_domain": "esphome",
+  "version": "2.2.0",
   "new_install_prompt_erase": true,
   "builds": [
     {