Replace broken QR login with manual JSESSIONID cookie

Samsung rebuilt account.samsung.com as a JS SPA backed by /iam/oauth2,
so the integration's HTML-scraping QR flow can no longer find the
signin URL and /accounts/v1/FMM2/signInWithQrCode now 404s. The STF
backend (chkLogin.do, getDeviceList.do, ...) is unchanged.

Replace the multi-step QR config flow with a single form that asks
the user to paste the JSESSIONID cookie copied from a logged-in
browser session at smartthingsfind.samsung.com. validate_jsessionid
hits chkLogin.do to verify the cookie before accepting it.

Also bundle in earlier compatibility fixes for newer HA: store
devices in hass.data so the coordinator can look them up by
entry_id, and use async_on_update on the device_tracker entity.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

custom_components/smartthings_find/manifest.json

@@ -2,13 +2,13 @@
   "domain": "smartthings_find",
   "name": "SmartThings Find",
   "after_dependencies": ["http"],
-  "version": "0.2.1",
-  "documentation": "https://github.com/Vedeneb/HA-SmartThings-Find",
-  "issue_tracker": "https://github.com/Vedeneb/HA-SmartThings-Find/issues",
+  "version": "0.3.0",
+  "documentation": "https://git.jeena.net/jeena/HA-SmartThings-Find",
+  "issue_tracker": "https://git.jeena.net/jeena/HA-SmartThings-Find/issues",
   "integration_type": "hub",
   "dependencies": [],
-  "codeowners": ["@Vedeneb"],
-  "requirements": ["requests", "qrcode"],
+  "codeowners": ["@jeena"],
+  "requirements": ["requests", "qrcode[pil]", "pillow", "pytz"],
   "iot_class": "cloud_polling",
   "config_flow": true
 }