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/rpc/rpc_worker.h

@@ -6,6 +6,7 @@
 
 #include <atomic>
 #include <condition_variable>
+#include <cstddef>
 #include <deque>
 #include <functional>
 #include <mutex>
@@ -69,6 +70,8 @@ public:
 
     /// True when there are completed results waiting for the main thread.
     bool hasPendingResults() const;
+    std::size_t pendingTaskCount() const;
+    std::size_t pendingResultCount() const;
 
     /// True when the worker thread is running.
     bool isRunning() const { return running_.load(std::memory_order_relaxed); }
@@ -80,7 +83,7 @@ private:
     std::atomic<bool> running_{false};
 
     // ---- Task queue (produced by main thread, consumed by worker) ----
-    std::mutex taskMtx_;
+    mutable std::mutex taskMtx_;
     std::condition_variable taskCv_;
     std::deque<WorkFn> tasks_;