feat(lite): add ObsidianDragonLite build mode and gate full-node features

Add --lite build flow and ObsidianDragonLite target naming, hide full-node pages/features in lite mode, enforce pool-only mining in lite, and include chat port feasibility audit documentation.

src/app_network.cpp

@@ -60,6 +60,23 @@ using NetworkRefreshService = services::NetworkRefreshService;
 
 namespace {
 
+bool isPageEnabledForBuild(ui::NavPage page)
+{
+#if DRAGONX_LITE_BUILD
+    switch (page) {
+        case ui::NavPage::Console:
+        case ui::NavPage::Peers:
+        case ui::NavPage::Explorer:
+            return false;
+        default:
+            return true;
+    }
+#else
+    (void)page;
+    return true;
+#endif
+}
+
 std::string unencryptedTransactionHistoryCacheKey(const std::string& walletIdentity)
 {
     return std::string("obsidian-dragon-unencrypted-tx-cache-v1:") +
@@ -545,6 +562,9 @@ bool App::shouldRunWalletTransactionRefresh() const
 
 void App::setCurrentPage(ui::NavPage page)
 {
+    if (!isPageEnabledForBuild(page)) {
+        page = ui::NavPage::Overview;
+    }
     if (page == current_page_) return;
     current_page_ = page;
     applyRefreshPolicy(page);
@@ -1372,6 +1392,11 @@ void App::refreshMarketData()
 
 void App::startMining(int threads)
 {
+#if DRAGONX_LITE_BUILD
+    (void)threads;
+    ui::Notifications::instance().warning("Solo mining is unavailable in lite build");
+    return;
+#endif
     if (!state_.connected || !rpc_ || !worker_) return;
     if (mining_toggle_in_progress_.exchange(true)) return; // already in progress
 
@@ -1401,6 +1426,9 @@ void App::startMining(int threads)
 
 void App::stopMining()
 {
+#if DRAGONX_LITE_BUILD
+    return;
+#endif
     if (!state_.connected || !rpc_ || !worker_) return;
     if (mining_toggle_in_progress_.exchange(true)) return; // already in progress