DragonX compatibility: crash fixes, reorg detection, server failover, sync perf

- Fix Rust FFI panics with catch_unwind wrappers and safe CString handling
- Handle poisoned mutex/RwLock from prior panics instead of crashing
- Add stuck sync detection (10s stall threshold) and chain reorg user prompt
- Add "Skip Verification" button to seed phrase wizard
- Update payment URIs from hush: to drgx:
- Update branding strings throughout UI
- Add all 6 lite servers (lite, lite1-5.dragonx.is) with random selection
- Add server connectivity probing to skip unreachable servers
- Reuse Tokio runtime across block fetch batches to reduce sync overhead
- Update Cargo.lock dependencies

res/silentdragonxlite.desktop

@@ -1,13 +1,13 @@
-[Desktop Entry]
-Name=SilentDragonXLite
-Comment=Lightclient UI wallet for DragonX
-GenericName=Wallet
-Exec=SilentDragonXLite %u
-Icon=SilentDragonXLite
-Type=Application
-StartupNotify=true
-StartupWMClass=SilentDragonXLite
-Categories=Utility;
-MimeType=x-scheme-handler/dragonx;
-Keywords=SilentDragonXLite;
-
+[Desktop Entry]
+Name=SilentDragonXLite
+Comment=Lightclient UI wallet for DragonX
+GenericName=Wallet
+Exec=SilentDragonXLite %u
+Icon=SilentDragonXLite
+Type=Application
+StartupNotify=true
+StartupWMClass=SilentDragonXLite
+Categories=Utility;
+MimeType=x-scheme-handler/dragonx;
+Keywords=SilentDragonXLite;
+