Add mine-when-idle, default banlist, and console parsing improvements

Mine-when-idle:
- Auto-start/stop mining based on system idle time detection
- Platform::getSystemIdleSeconds() via XScreenSaver (Linux) / GetLastInputInfo (Win)
- Settings: mine_when_idle toggle + configurable delay (30s–10m)
- Settings page UI with checkbox and delay combo

Console tab:
- Shell-like argument parsing with quote and JSON bracket support
- Pass JSON objects/arrays directly as RPC params
- Fix selection indices when lines are evicted from buffer

Connection & status bar:
- Reduce RPC connect timeout to 1s for localhost fast-fail
- Fast retry timer on daemon startup and external daemon detection
- Show pool mining hashrate in status bar; sidebar badge reflects pool state

UI polish:
- Add logo to About card in settings; expose logo dimensions on App
- Header title offset-y support; adjust content-area margins
- Fix banned peers row cursor position (rawRowPosB.x)

Branding:
- Update copyright to "DragonX Developers" in RC and About section
- Replace logo/icon assets with updated versions

Misc:
- setup.sh: checkout dragonx branch before pulling
- Remove stale prebuilt-binaries/xmrig/.gitkeep

src/config/settings.cpp

@@ -148,6 +148,8 @@ bool Settings::load(const std::string& path)
         if (j.contains("pool_tls"))        pool_tls_       = j["pool_tls"].get<bool>();
         if (j.contains("pool_hugepages"))  pool_hugepages_ = j["pool_hugepages"].get<bool>();
         if (j.contains("pool_mode"))       pool_mode_      = j["pool_mode"].get<bool>();
+        if (j.contains("mine_when_idle"))   mine_when_idle_ = j["mine_when_idle"].get<bool>();
+        if (j.contains("mine_idle_delay"))  mine_idle_delay_= std::max(30, j["mine_idle_delay"].get<int>());
         if (j.contains("saved_pool_urls") && j["saved_pool_urls"].is_array()) {
             saved_pool_urls_.clear();
             for (const auto& u : j["saved_pool_urls"])
@@ -231,6 +233,8 @@ bool Settings::save(const std::string& path)
     j["pool_tls"]       = pool_tls_;
     j["pool_hugepages"] = pool_hugepages_;
     j["pool_mode"]      = pool_mode_;
+    j["mine_when_idle"] = mine_when_idle_;
+    j["mine_idle_delay"]= mine_idle_delay_;
     j["saved_pool_urls"] = json::array();
     for (const auto& u : saved_pool_urls_)
         j["saved_pool_urls"].push_back(u);