feat: blockchain rescan via daemon restart + status bar progress

- Fix z_importwallet to use full path instead of filename only
- Add rescanBlockchain() method that restarts daemon with -rescan flag
- Track rescan progress via daemon output parsing and getrescaninfo RPC
- Display rescan progress in status bar with animated indicator when starting
- Improve dark theme card contrast: lighter surface-variant, tinted borders, stronger rim-light

src/app.h

@@ -241,6 +241,7 @@ public:
     bool isEmbeddedDaemonRunning() const;
     bool isUsingEmbeddedDaemon() const { return use_embedded_daemon_; }
     void setUseEmbeddedDaemon(bool use) { use_embedded_daemon_ = use; }
+    void rescanBlockchain();  // restart daemon with -rescan flag
 
     // Get daemon memory usage in MB (uses embedded daemon handle if available,
     // falls back to platform-level process scan for external daemons)
@@ -304,6 +305,7 @@ public:
     void showDecryptDialog() {
         show_decrypt_dialog_ = true;
         decrypt_phase_ = 0; // passphrase entry
+        decrypt_step_ = 0;
         decrypt_status_.clear();
         decrypt_in_progress_ = false;
         memset(decrypt_pass_buf_, 0, sizeof(decrypt_pass_buf_));
@@ -368,6 +370,7 @@ private:
     bool use_embedded_daemon_ = true;
     std::string daemon_status_;
     mutable std::string daemon_mem_diag_;  // diagnostic info for daemon memory detection
+    size_t daemon_output_offset_ = 0;      // for incremental output parsing (rescan detection)
     
     // Export/Import state
     std::string export_result_;
@@ -505,6 +508,7 @@ private:
     // Decrypt wallet dialog state
     bool show_decrypt_dialog_ = false;
     int decrypt_phase_ = 0;  // 0=passphrase, 1=working, 2=done, 3=error
+    int decrypt_step_ = 0;   // 0=unlock, 1=export, 2=stop, 3=rename, 4=restart, 5=import
     char decrypt_pass_buf_[256] = {};
     std::string decrypt_status_;
     bool decrypt_in_progress_ = false;