Refactor app services and stabilize refresh/UI flows

- Add refresh scheduler and network refresh service boundaries for typed
  refresh results, ordered RPC collectors, applicators, and price parsing.
- Add daemon lifecycle and wallet security workflow helpers while preserving
  App-owned command RPC, decrypt, cancellation, and UI handoff behavior.
- Split balance, console, mining, amount formatting, and async task logic into
  focused modules with expanded Phase 4 test coverage.
- Fix market price loading by triggering price refresh immediately, avoiding
  queue-pressure drops, tracking loading/error state, and adding translations.
- Polish send, explorer, peers, settings, theme/schema, and related tab UI.
- Replace checked-in generated language headers with build-generated resources.
- Document the cleanup audit, UI static-state guidance, and architecture updates.

src/util/bootstrap.cpp

@@ -68,6 +68,7 @@ Bootstrap::~Bootstrap() {
 
 void Bootstrap::start(const std::string& dataDir, const std::string& url) {
     if (worker_running_) return; // already running
+    if (worker_.joinable()) worker_.join();
 
     cancel_requested_ = false;
     worker_running_ = true;
@@ -175,7 +176,6 @@ void Bootstrap::start(const std::string& dataDir, const std::string& url) {
         setProgress(State::Completed, "Bootstrap complete!");
         worker_running_ = false;
     });
-    worker_.detach();
 }
 
 void Bootstrap::cancel() {