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

singleapplication/singleapplication.pri

@@ -1,19 +1,19 @@
-QT += core network
-CONFIG += c++11
-
-HEADERS += $$PWD/singleapplication.h \
-    $$PWD/singleapplication_p.h
-SOURCES += $$PWD/singleapplication.cpp \
-    $$PWD/singleapplication_p.cpp
-
-INCLUDEPATH += $$PWD
-
-win32 {
-    msvc:LIBS += Advapi32.lib
-    gcc:LIBS += -ladvapi32
-}
-
-DISTFILES += \
-    $$PWD/README.md \
-    $$PWD/CHANGELOG.md \
-    $$PWD/Windows.md
+QT += core network
+CONFIG += c++11
+
+HEADERS += $$PWD/singleapplication.h \
+    $$PWD/singleapplication_p.h
+SOURCES += $$PWD/singleapplication.cpp \
+    $$PWD/singleapplication_p.cpp
+
+INCLUDEPATH += $$PWD
+
+win32 {
+    msvc:LIBS += Advapi32.lib
+    gcc:LIBS += -ladvapi32
+}
+
+DISTFILES += \
+    $$PWD/README.md \
+    $$PWD/CHANGELOG.md \
+    $$PWD/Windows.md