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

lib/Cargo.lock

@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "adler32"
 version = "1.0.4"
@@ -1854,7 +1856,6 @@ dependencies = [
 [[package]]
 name = "silentdragonxlitelib"
 version = "0.1.0"
-source = "git+https://git.hush.is/dragonx/silentdragonxlite-cli?rev=3eaa2fcf939af9821df10b458af11b185f49e287#3eaa2fcf939af9821df10b458af11b185f49e287"
 dependencies = [
  "base58",
  "bellman",