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/app_security.cpp

@@ -413,6 +413,67 @@ void App::checkAutoLock() {
     }
 }
 
+// ===========================================================================
+// Mine when idle — auto-start/stop mining based on system idle state
+// ===========================================================================
+
+void App::checkIdleMining() {
+    if (!settings_ || !settings_->getMineWhenIdle()) {
+        // Feature disabled — if we previously auto-started, stop now
+        if (idle_mining_active_) {
+            idle_mining_active_ = false;
+            if (settings_ && settings_->getPoolMode()) {
+                if (xmrig_manager_ && xmrig_manager_->isRunning())
+                    stopPoolMining();
+            } else {
+                if (state_.mining.generate)
+                    stopMining();
+            }
+        }
+        return;
+    }
+
+    int idleSec = util::Platform::getSystemIdleSeconds();
+    int delay = settings_->getMineIdleDelay();
+    bool isPool = settings_->getPoolMode();
+
+    // Check if mining is already running (manually started by user)
+    bool miningActive = isPool
+        ? (xmrig_manager_ && xmrig_manager_->isRunning())
+        : state_.mining.generate;
+
+    if (idleSec >= delay) {
+        // System is idle — start mining if not already running
+        if (!miningActive && !idle_mining_active_ && !mining_toggle_in_progress_.load()) {
+            // For solo mining, need daemon connected and synced
+            if (!isPool && (!state_.connected || state_.sync.syncing)) return;
+
+            int threads = settings_->getPoolThreads();
+            if (threads <= 0) threads = std::max(1, (int)std::thread::hardware_concurrency() / 2);
+
+            idle_mining_active_ = true;
+            if (isPool)
+                startPoolMining(threads);
+            else
+                startMining(threads);
+            DEBUG_LOGF("[App] Idle mining started after %d seconds idle\n", idleSec);
+        }
+    } else {
+        // User is active — stop mining if we auto-started it
+        if (idle_mining_active_) {
+            idle_mining_active_ = false;
+            if (isPool) {
+                if (xmrig_manager_ && xmrig_manager_->isRunning())
+                    stopPoolMining();
+            } else {
+                if (state_.mining.generate)
+                    stopMining();
+            }
+            DEBUG_LOGF("[App] Idle mining stopped — user returned\n");
+        }
+    }
+}
+
 // ===========================================================================
 // Restart Setup Wizard (from Settings)
 // ===========================================================================