fix: Tier-2 involved mediums — send confirm re-validation + console JSON errors

- Send: re-validate against LIVE state at the "Confirm & Send" click (connected,
  not syncing, amount > 0, total <= available). The confirm dialog persists
  across frames, so a balance drop / sync restart / fee bump after Review could
  otherwise broadcast a now-invalid transaction; it now shows a clear message
  instead of sending.
- Console: a malformed JSON argument ({...}/[...] that fails to parse) was
  silently sent to the daemon as a plain string. Now the command fails with a
  clear "Argument N is not valid JSON" line instead of being silently mangled.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

res/themes/ui.toml

@@ -931,7 +931,7 @@ scanline-speed = { size = 40.0 }
 scanline-height = { size = 36.0 }
 scanline-alpha = { size = 8.0 }
 scanline-gap = { size = 2.0 }
-scanline-line-alpha = { size = 4.0 }
+scanline-line-alpha = { size = 2.0 }
 scanline-glow-spread = { size = 4.0 }
 scanline-glow-intensity = { size = 0.6 }
 scanline-glow-color = { size = 255.0 }

src/app.cpp

@@ -2509,7 +2509,28 @@ void App::renderLiteFirstRunPrompt()
                 while (!seedTrim.empty() && std::isspace((unsigned char)seedTrim.front())) seedTrim.erase(seedTrim.begin());
                 while (!seedTrim.empty() && std::isspace((unsigned char)seedTrim.back())) seedTrim.pop_back();
 
-                ImGui::BeginDisabled(seedTrim.empty());
+                // Require a valid BIP39 word count before enabling Restore — otherwise a truncated or
+                // garbage phrase (previously any non-empty text passed) is submitted and fails opaquely.
+                int seedWords = 0;
+                { bool inWord = false;
+                  for (char c : seedTrim) {
+                      bool sp = (c == ' ' || c == '\t' || c == '\n' || c == '\r');
+                      if (!sp && !inWord) { seedWords++; inWord = true; }
+                      else if (sp) inWord = false;
+                  } }
+                bool seedLenOk = (seedWords == 12 || seedWords == 15 || seedWords == 18 ||
+                                  seedWords == 21 || seedWords == 24);
+                if (!seedTrim.empty() && !seedLenOk) {
+                    ImGui::PushStyleColor(ImGuiCol_Text, ImGui::ColorConvertU32ToFloat4(ui::material::Warning()));
+                    ImGui::PushTextWrapPos(ImGui::GetCursorPosX() + 380.0f);
+                    ImGui::TextUnformatted(("Recovery phrase should be 24 words — you have " +
+                                            std::to_string(seedWords) + ".").c_str());
+                    ImGui::PopTextWrapPos();
+                    ImGui::PopStyleColor();
+                    ImGui::Spacing();
+                }
+
+                ImGui::BeginDisabled(!seedLenOk);
                 if (ui::material::TactileButton(TR("lite_restore_btn"), ImVec2(btnW, 0))) {
                     wallet::LiteWalletRestoreRequest req;
                     req.seedPhrase = seedTrim;
@@ -2629,20 +2650,24 @@ void App::renderImportKeyDialog()
         memset(import_key_input_, 0, sizeof(import_key_input_));
     }
     
+    // Trimmed view for validation (importPrivateKey trims again before the RPC). The indicator and the
+    // Import-button guard below both derive from the SAME shared classifier, so they can't disagree.
+    std::string keyTrim(import_key_input_);
+    while (!keyTrim.empty() && (keyTrim.front()==' '||keyTrim.front()=='\t'||keyTrim.front()=='\n'||keyTrim.front()=='\r')) keyTrim.erase(keyTrim.begin());
+    while (!keyTrim.empty() && (keyTrim.back()==' '||keyTrim.back()=='\t'||keyTrim.back()=='\n'||keyTrim.back()=='\r')) keyTrim.pop_back();
+    bool keyRecognized = services::WalletSecurityController::isRecognizedPrivateKey(keyTrim);
+    bool keyIsZ = services::WalletSecurityController::classifyPrivateKey(keyTrim)
+                  == services::WalletSecurityController::KeyKind::Shielded;
+
     // Key validation indicator
-    if (import_key_input_[0] != '\0') {
-        std::string k(import_key_input_);
-        bool isZKey = (k.substr(0, 20) == "secret-extended-key-") ||
-                      (k.length() >= 2 && k[0] == 'S' && k[1] == 'K');
-        bool isTKey = (k.length() >= 51 && k.length() <= 52 &&
-                      (k[0] == '5' || k[0] == 'K' || k[0] == 'L' || k[0] == 'U'));
-        if (isZKey || isTKey) {
+    if (!keyTrim.empty()) {
+        if (keyRecognized) {
             ImGui::PushFont(ui::material::Type().iconSmall());
             ImGui::TextColored(ImVec4(0.3f, 0.8f, 0.3f, 1.0f), ICON_MD_CHECK_CIRCLE);
             ImGui::PopFont();
             ImGui::SameLine(0, 4.0f);
             ImGui::TextColored(ImVec4(0.3f, 0.8f, 0.3f, 1.0f), "%s",
-                               isZKey ? "Shielded spending key" : "Transparent private key");
+                               keyIsZ ? "Shielded spending key" : "Transparent private key");
         } else {
             ImGui::PushFont(ui::material::Type().iconSmall());
             ImGui::TextColored(ImVec4(0.8f, 0.6f, 0.0f, 1.0f), ICON_MD_HELP);
@@ -2665,10 +2690,9 @@ void App::renderImportKeyDialog()
     ImGui::Spacing();
     ImGui::Separator();
     
+    ImGui::BeginDisabled(!keyRecognized);   // only a recognized Z/T key can be imported
     if (ui::material::StyledButton("Import", ImVec2(btnW, 0), ui::material::resolveButtonFont(btnFont))) {
-        std::string key(import_key_input_);
-        if (!key.empty()) {
-            importPrivateKey(key, [this](bool success, const std::string& msg) {
+        importPrivateKey(std::string(import_key_input_), [this](bool success, const std::string& msg) {
             import_success_ = success;
             import_status_ = msg;
             if (success) {
@@ -2676,7 +2700,7 @@ void App::renderImportKeyDialog()
             }
         });
     }
-    }
+    ImGui::EndDisabled();
     ImGui::SameLine();
     if (ui::material::StyledButton("Close", ImVec2(btnW, 0), ui::material::resolveButtonFont(btnFont))) {
         show_import_key_ = false;
@@ -2782,8 +2806,10 @@ void App::renderBackupDialog()
     
     ImGui::Text("Backup File Path:");
     static char backup_path[512] = "dragonx-backup.txt";
+    static bool s_backup_confirm_overwrite = false;
     ImGui::SetNextItemWidth(-1);
-    ImGui::InputText("##backuppath", backup_path, sizeof(backup_path));
+    if (ImGui::InputText("##backuppath", backup_path, sizeof(backup_path)))
+        s_backup_confirm_overwrite = false;   // path edited — re-check overwrite on next Save
     
     ImGui::Spacing();
     
@@ -2800,17 +2826,30 @@ void App::renderBackupDialog()
     
     if (ui::material::StyledButton("Save Backup", ImVec2(btnW, 0), ui::material::resolveButtonFont(btnFont))) {
         std::string path(backup_path);
+        // Trim surrounding whitespace (a pasted path can carry a trailing newline).
+        while (!path.empty() && (path.front()==' '||path.front()=='\t'||path.front()=='\n'||path.front()=='\r')) path.erase(path.begin());
+        while (!path.empty() && (path.back()==' '||path.back()=='\t'||path.back()=='\n'||path.back()=='\r')) path.pop_back();
         if (!path.empty()) {
+            std::error_code ec;
+            if (!s_backup_confirm_overwrite && std::filesystem::exists(path, ec)) {
+                // Don't clobber an existing file (possibly a good earlier backup) without confirmation.
+                s_backup_confirm_overwrite = true;
+                backup_success_ = false;
+                backup_status_ = "A file already exists there — click Save Backup again to overwrite it.";
+            } else {
+                s_backup_confirm_overwrite = false;
                 backupWallet(path, [this](bool success, const std::string& msg) {
                     backup_success_ = success;
                     backup_status_ = msg;
                 });
             }
         }
+    }
     ImGui::SameLine();
     if (ui::material::StyledButton("Close", ImVec2(btnW, 0), ui::material::resolveButtonFont(btnFont))) {
         show_backup_ = false;
         backup_status_.clear();
+        s_backup_confirm_overwrite = false;
     }
     
     ui::material::EndOverlayDialog();
@@ -3151,6 +3190,13 @@ void App::rescanBlockchain()
         return;
     }
 
+    // Re-entrancy guard: a rescan/repair (both drive state_.sync.rescanning) or this exact task already
+    // running would stomp each other — a second confirm must not launch a duplicate operation.
+    if (state_.sync.rescanning || async_tasks_.isRunning(decision.taskName)) {
+        ui::Notifications::instance().warning("A blockchain maintenance operation is already in progress.");
+        return;
+    }
+
     DEBUG_LOGF("[App] Starting blockchain rescan - stopping daemon first\n");
     ui::Notifications::instance().info("Restarting daemon with -rescan flag...");
     
@@ -3193,6 +3239,11 @@ void App::repairWallet()
         return;
     }
 
+    if (state_.sync.rescanning || async_tasks_.isRunning(decision.taskName)) {
+        ui::Notifications::instance().warning("A blockchain maintenance operation is already in progress.");
+        return;
+    }
+
     DEBUG_LOGF("[App] Starting wallet repair (-zapwallettxes=2) - stopping daemon first\n");
     ui::Notifications::instance().info("Restarting daemon with -zapwallettxes=2 (wallet repair)...");
 
@@ -3234,6 +3285,11 @@ void App::reinstallBundledDaemon()
         return;
     }
 
+    if (async_tasks_.isRunning("reinstall-daemon")) {
+        ui::Notifications::instance().warning("The daemon reinstall is already in progress.");
+        return;
+    }
+
     DEBUG_LOGF("[App] Reinstalling bundled daemon binary — stopping daemon first\n");
     ui::Notifications::instance().info("Installing bundled daemon — the node will stop, update, and restart...");
 
@@ -3273,6 +3329,11 @@ void App::deleteBlockchainData()
         return;
     }
 
+    if (state_.sync.rescanning || async_tasks_.isRunning(decision.taskName)) {
+        ui::Notifications::instance().warning("A blockchain maintenance operation is already in progress.");
+        return;
+    }
+
     DEBUG_LOGF("[App] Deleting blockchain data - stopping daemon first\n");
     ui::Notifications::instance().info("Stopping daemon and deleting blockchain data...");
 

src/app.h

@@ -269,7 +269,8 @@ public:
 
     // Key export/import
     void exportPrivateKey(const std::string& address, std::function<void(const std::string&)> callback);
-    void exportAllKeys(std::function<void(const std::string&)> callback);
+    // callback receives (keys, exportedCount, totalAddresses) so callers can detect a keyless/partial export.
+    void exportAllKeys(std::function<void(const std::string&, int, int)> callback);
     void importPrivateKey(const std::string& key, std::function<void(bool, const std::string&)> callback);
     
     // Wallet backup

src/app_network.cpp

@@ -2323,10 +2323,10 @@ void App::exportPrivateKey(const std::string& address, std::function<void(const
     });
 }
 
-void App::exportAllKeys(std::function<void(const std::string&)> callback)
+void App::exportAllKeys(std::function<void(const std::string&, int, int)> callback)
 {
     if (!state_.connected || !rpc_) {
-        if (callback) callback("");
+        if (callback) callback("", 0, 0);
         return;
     }
 
@@ -2334,6 +2334,7 @@ void App::exportAllKeys(std::function<void(const std::string&)> callback)
     auto keys_result = std::make_shared<std::string>();
     auto pending = std::make_shared<int>(0);
     auto total = std::make_shared<int>(0);
+    auto exported = std::make_shared<int>(0);   // keys actually retrieved (vs. failed/locked)
 
     // First get all addresses
     auto all_addresses = std::make_shared<std::vector<std::string>>();
@@ -2351,7 +2352,7 @@ void App::exportAllKeys(std::function<void(const std::string&)> callback)
     *pending = *total;
 
     if (*total == 0) {
-        if (callback) callback("# No addresses to export\n");
+        if (callback) callback("# No addresses to export\n", 0, 0);
         return;
     }
 
@@ -2359,26 +2360,40 @@ void App::exportAllKeys(std::function<void(const std::string&)> callback)
     *keys_result += "# WARNING: Keep this file secure! Anyone with these keys can spend your coins!\n\n";
 
     for (const auto& addr : *all_addresses) {
-        exportPrivateKey(addr, [keys_result, pending, total, callback, addr](const std::string& key) {
+        exportPrivateKey(addr, [keys_result, pending, total, exported, callback, addr](const std::string& key) {
             if (!key.empty()) {
                 *keys_result += "# " + addr + "\n";
                 *keys_result += key + "\n\n";
+                (*exported)++;
             }
             (*pending)--;
             if (*pending == 0 && callback) {
-                callback(*keys_result);
+                callback(*keys_result, *exported, *total);
             }
         });
     }
 }
 
-void App::importPrivateKey(const std::string& key, std::function<void(bool, const std::string&)> callback)
+void App::importPrivateKey(const std::string& rawKey, std::function<void(bool, const std::string&)> callback)
 {
     if (!state_.connected || !rpc_ || !worker_) {
         if (callback) callback(false, "Not connected");
         return;
     }
 
+    // Trim whitespace/newlines — manual entry doesn't go through the dialog's Paste trimmer, and a
+    // stray character makes the daemon reject the key with a cryptic error.
+    std::string key(rawKey);
+    while (!key.empty() && (key.front()==' '||key.front()=='\t'||key.front()=='\n'||key.front()=='\r')) key.erase(key.begin());
+    while (!key.empty() && (key.back()==' '||key.back()=='\t'||key.back()=='\n'||key.back()=='\r')) key.pop_back();
+
+    // Reject anything that doesn't look like a Z/T private key before handing it to the daemon (the
+    // dialog's indicator and this guard now share isRecognizedPrivateKey, so they can't disagree).
+    if (!services::WalletSecurityController::isRecognizedPrivateKey(key)) {
+        if (callback) callback(false, "Unrecognized private-key format.");
+        return;
+    }
+
     const bool shielded = services::WalletSecurityController::classifyPrivateKey(key)
                           == services::WalletSecurityController::KeyKind::Shielded;
     // Run on the worker thread — import requests a full rescan (rescan=true), so the
@@ -2413,25 +2428,33 @@ void App::backupWallet(const std::string& destination, std::function<void(bool,
         return;
     }
     
-    // Use z_exportwallet or similar to export all keys
-    // For now, we'll use exportAllKeys and save to file
-    exportAllKeys([destination, callback](const std::string& keys) {
-        if (keys.empty()) {
-            if (callback) callback(false, "Failed to export keys");
+    // Export all keys and save to file.
+    exportAllKeys([destination, callback](const std::string& keys, int exported, int total) {
+        // NEVER write (or report success for) a keyless backup — the usual cause is an encrypted+locked
+        // wallet, and a "success" here would leave the user believing they have a recovery file when the
+        // file contains only the header comments and ZERO keys.
+        if (exported == 0) {
+            if (callback) callback(false, total == 0
+                ? "No addresses to back up."
+                : "Backup failed: 0 of " + std::to_string(total) + " keys could be exported. "
+                  "Unlock the wallet (if encrypted) and try again.");
             return;
         }
 
-        // Write to file
         std::ofstream file(destination);
         if (!file.is_open()) {
             if (callback) callback(false, "Could not open file: " + destination);
             return;
         }
-        
         file << keys;
         file.close();
 
-        if (callback) callback(true, "Wallet backup saved to: " + destination);
+        std::string msg = "Wallet backup saved to " + destination + " — "
+                        + std::to_string(exported) + " of " + std::to_string(total) + " keys.";
+        if (exported < total)
+            msg += " NOTE: some addresses had no spending key or the wallet is locked — this backup is INCOMPLETE.";
+        // A partial backup is a real risk for recovery, so surface it as a warning (not a green success).
+        if (callback) callback(exported == total, msg);
     });
 }
 

src/app_wizard.cpp

@@ -1285,10 +1285,24 @@ void App::renderFirstRunWizard() {
                 cy += captionFont->LegacySize + 6.0f * dp;
             }
 
+            // Warn + block if the passphrase has leading/trailing whitespace. Silently trimming it would
+            // change the passphrase the user believes they set and lock them out on the next unlock.
+            bool passEdgeSpace = false;
+            if (size_t pl = strlen(encrypt_pass_buf_)) {
+                char a = encrypt_pass_buf_[0], b = encrypt_pass_buf_[pl - 1];
+                passEdgeSpace = (a == ' ' || a == '\t' || b == ' ' || b == '\t');
+            }
+            if (passEdgeSpace) {
+                dl->AddText(captionFont, captionFont->LegacySize, ImVec2(cx, cy),
+                            ui::material::Error(), "Passphrase has leading/trailing spaces — remove them");
+                cy += captionFont->LegacySize + 6.0f * dp;
+            }
+
             // Buttons
             {
                 bool passValid = strlen(encrypt_pass_buf_) >= 8 &&
-                                 strcmp(encrypt_pass_buf_, encrypt_confirm_buf_) == 0;
+                                 strcmp(encrypt_pass_buf_, encrypt_confirm_buf_) == 0 &&
+                                 !passEdgeSpace;
                 // PIN is optional: if entered, must be valid + confirmed
                 std::string pinStr(wizard_pin_buf_);
                 bool pinEntered = !pinStr.empty();
@@ -1342,6 +1356,13 @@ void App::renderFirstRunWizard() {
                 ImGui::SetCursorScreenPos(ImVec2(bx + encBtnW + 12.0f * dp, cy));
                 ImGui::PushStyleVar(ImGuiStyleVar_FrameRounding, 8.0f * dp);
                 if (ui::material::TactileButton("Skip##enc", ImVec2(skipW2, btnH2))) {
+                    static bool s_skipEncConfirm = false;
+                    if (!s_skipEncConfirm) {
+                        // Skipping stores private keys UNENCRYPTED — require a confirming second click.
+                        s_skipEncConfirm = true;
+                        encrypt_status_ = "Continue WITHOUT encryption? Keys will be stored unencrypted — click Skip again to confirm.";
+                    } else {
+                        s_skipEncConfirm = false;
                         wizard_phase_ = WizardPhase::Done;
                         settings_->setWizardCompleted(true);
                         settings_->save();
@@ -1353,6 +1374,7 @@ void App::renderFirstRunWizard() {
                         }
                         tryConnect();
                     }
+                }
                 ImGui::PopStyleVar();
                 cy += btnH2;
             }

src/services/wallet_security_controller.cpp

@@ -97,7 +97,22 @@ WalletSecurityController::KeyKind WalletSecurityController::classifyAddress(cons
 
 WalletSecurityController::KeyKind WalletSecurityController::classifyPrivateKey(const std::string& key)
 {
-    return !key.empty() && key[0] == 's' ? KeyKind::Shielded : KeyKind::Transparent;
+    // Shielded: Sapling extended spending key (secret-extended-key-...) or legacy Sprout (SK...).
+    // (The old `key[0]=='s'` test misrouted an uppercase "SK..." shielded key to the transparent RPC.)
+    if (key.rfind("secret-extended-key-", 0) == 0) return KeyKind::Shielded;
+    if (key.size() >= 2 && key[0] == 'S' && key[1] == 'K') return KeyKind::Shielded;
+    if (!key.empty() && key[0] == 's') return KeyKind::Shielded;
+    return KeyKind::Transparent;
+}
+
+bool WalletSecurityController::isRecognizedPrivateKey(const std::string& key)
+{
+    if (key.rfind("secret-extended-key-", 0) == 0) return true;               // Sapling z spending key
+    if (key.size() >= 2 && key[0] == 'S' && key[1] == 'K') return true;       // Sprout z spending key
+    // Transparent WIF: base58, ~51-52 chars, common version prefixes.
+    if (key.size() >= 51 && key.size() <= 52 &&
+        (key[0] == '5' || key[0] == 'K' || key[0] == 'L' || key[0] == 'U')) return true;
+    return false;
 }
 
 const char* WalletSecurityController::importSuccessMessage(KeyKind kind)

src/services/wallet_security_controller.h

@@ -74,6 +74,9 @@ public:
                                                 std::size_t minLength = 4);
     static KeyKind classifyAddress(const std::string& address);
     static KeyKind classifyPrivateKey(const std::string& key);
+    // True if `key` looks like a recognized Z (Sapling/Sprout spending) or T (WIF) private key.
+    // Single source of truth for the import dialog's indicator AND its submit guard.
+    static bool isRecognizedPrivateKey(const std::string& key);
     static const char* importSuccessMessage(KeyKind kind);
     static std::string decryptExportFileName(std::uint64_t timestampSeconds);
     static void secureClear(std::string& value);

src/ui/pages/settings_page.cpp

@@ -1741,11 +1741,18 @@ void RenderSettingsPage(App* app) {
                                          ImGuiInputTextFlags_Password);
                         ImGui::SetCursorScreenPos(ImVec2(leftX, ImGui::GetCursorScreenPos().y));
                         if (TactileButton(TrId("lite_import", "LiteImportKeyBtn").c_str(), ImVec2(0, 0), S.resolveFont("button"))) {
-                            const auto r = app->liteWallet()->importKey(s_settingsState.lite_import_key);
+                            std::string liteKey(s_settingsState.lite_import_key);
+                            while (!liteKey.empty() && (liteKey.front()==' '||liteKey.front()=='\t'||liteKey.front()=='\n'||liteKey.front()=='\r')) liteKey.erase(liteKey.begin());
+                            while (!liteKey.empty() && (liteKey.back()==' '||liteKey.back()=='\t'||liteKey.back()=='\n'||liteKey.back()=='\r')) liteKey.pop_back();
+                            if (liteKey.empty()) {
+                                s_settingsState.lite_backup_status = "Enter a private key to import.";
+                            } else {
+                                const auto r = app->liteWallet()->importKey(liteKey);
                                 sodium_memzero(s_settingsState.lite_import_key, sizeof(s_settingsState.lite_import_key));
                                 s_settingsState.lite_backup_status =
                                     r.ok ? TR("lite_key_imported") : r.error;
                             }
+                        }
 
                         if (!s_settingsState.lite_backup_status.empty()) {
                             ImGui::SetCursorScreenPos(ImVec2(leftX, ImGui::GetCursorScreenPos().y));

src/ui/windows/address_book_dialog.cpp

@@ -129,7 +129,13 @@ void AddressBookDialog::render(App* app)
 
             const char* primaryLabel = isEdit ? TR("save") : TR("add");
             if (material::StyledButton(primaryLabel, ImVec2(actionW, 0), S.resolveFont(actionBtn.font))) {
-                data::AddressBookEntry entry(s_edit_label, s_edit_address, s_edit_notes);
+                // Trim the label/address (a pasted address often carries a trailing newline); keep notes as-is.
+                auto trimAB = [](std::string s) {
+                    while (!s.empty() && (s.front()==' '||s.front()=='\t'||s.front()=='\n'||s.front()=='\r')) s.erase(s.begin());
+                    while (!s.empty() && (s.back()==' '||s.back()=='\t'||s.back()=='\n'||s.back()=='\r')) s.pop_back();
+                    return s;
+                };
+                data::AddressBookEntry entry(trimAB(s_edit_label), trimAB(s_edit_address), s_edit_notes);
                 if (isEdit) {
                     if (getAddressBook().updateEntry(s_selected_index, entry)) {
                         Notifications::instance().success(TR("address_book_updated"));
@@ -183,11 +189,19 @@ void AddressBookDialog::render(App* app)
         
         ImGui::SameLine();
         
+        static int s_confirmDeleteIdx = -1;
         if (material::StyledButton(TR("delete"), ImVec2(0,0), S.resolveFont(actionBtn.font))) {
             if (has_selection) {
+                if (s_confirmDeleteIdx == s_selected_index) {
                     book.removeEntry(s_selected_index);
                     s_selected_index = -1;
+                    s_confirmDeleteIdx = -1;
                     Notifications::instance().success(TR("address_book_deleted"));
+                } else {
+                    // Require a second click to confirm (no undo for a removed contact).
+                    s_confirmDeleteIdx = s_selected_index;
+                    Notifications::instance().warning("Click Delete again to remove this entry.");
+                }
             }
         }
         

src/ui/windows/balance_components.cpp

@@ -786,7 +786,7 @@ void RenderSharedRecentTx(App* app, float recentH, float availW, float hs, float
         ImGuiWindowFlags_NoBackground);
 
     const auto& txs = state.transactions;
-    int count = (int)txs.size();
+    int count = std::min(4, (int)txs.size());  // show only the 4 most recent (state.transactions is newest-first)
 
     if (count == 0) {
         Type().textColored(TypeStyle::Caption, OnSurfaceDisabled(), TR("no_transactions_yet"));

src/ui/windows/bootstrap_download_dialog.h

@@ -30,8 +30,15 @@ class BootstrapDownloadDialog {
 public:
     static void show(App* app) {
         if (!app || !app->supportsFullNodeLifecycleActions()) return;
-        s_open = true;
         s_app = app;
+        // If a download is already in flight, RE-ATTACH to it (just reopen showing progress) instead of
+        // resetting state and orphaning the running worker / restarting an unverified download.
+        if (app->isBootstrapDownloading()) {
+            s_open = true;
+            if (s_state == State::Confirm) s_state = State::Downloading;
+            return;
+        }
+        s_open = true;
         s_state = State::Confirm;
         s_bootstrap.reset();
         s_errorMsg.clear();

src/ui/windows/console_command_executor.cpp

@@ -48,12 +48,19 @@ void FullNodeConsoleExecutor::submit(const std::string& cmd)
     }
 
     auto call = BuildConsoleRpcCall(cmd);
-    if (!call.valid) return;
+    if (!call.valid) {
+        if (!call.error.empty()) {
+            std::lock_guard<std::mutex> lk(results_mutex_);
+            results_.push_back({call.error, true});
+        }
+        return;
+    }
     const std::string method = call.method;
     const nlohmann::json params = call.params;
 
     rpc::RPCWorker* worker = app_->consoleWorker();
     if (worker) {
+        in_flight_.fetch_add(1);   // gates busy() so the input is disabled until this returns
         worker->post([rpc, method, params, this]() -> rpc::RPCWorker::MainCb {
             std::string result_str;
             bool is_error = false;
@@ -65,6 +72,7 @@ void FullNodeConsoleExecutor::submit(const std::string& cmd)
                 is_error = true;
             }
             return [this, result_str, is_error]() {
+                in_flight_.fetch_sub(1);
                 std::lock_guard<std::mutex> lk(results_mutex_);
                 results_.push_back({result_str, is_error});
             };
@@ -190,7 +198,12 @@ ConsoleStatusLine FullNodeConsoleExecutor::toolbarStatus() const
 {
     ConsoleStatusLine s;
     daemon::EmbeddedDaemon* d = app_->consoleDaemon();
-    if (!d) return s;  // empty text -> toolbar shows the generic "no daemon" label
+    if (!d) {
+        // No wallet-managed daemon, but a daemon started externally (before the wallet) is still
+        // reachable over RPC and accepts commands — report it as running rather than "no daemon".
+        if (app_->isConnected()) { s.text = TR("console_status_running"); s.color = Success(); }
+        return s;  // otherwise empty text -> toolbar shows the generic "no daemon" label
+    }
     using DState = daemon::EmbeddedDaemon::State;
     switch (d->getState()) {
         case DState::Stopped:  s.text = TR("console_status_stopped");  s.color = IM_COL32(150,150,150,255); break;

src/ui/windows/console_command_executor.h

@@ -12,6 +12,7 @@
 #include "console_channel.h"
 #include "imgui.h"
 
+#include <atomic>
 #include <cstdint>
 #include <deque>
 #include <functional>
@@ -91,9 +92,12 @@ public:
     ConsoleLogFilterCaps logFilterCaps() const override { return {true, true, true, true}; }
     void printHelp(const ConsoleAddLineFn& add) override;
     ConsoleStatusLine toolbarStatus() const override;
+    // A command is in flight on the RPC worker — lets the UI disable the input (no queued pile-up).
+    bool busy() const override { return in_flight_.load() > 0; }
 
 private:
     App*   app_;
+    std::atomic<int> in_flight_{0};
     size_t last_daemon_output_size_ = 0;
     size_t last_xmrig_output_size_  = 0;
     int    last_daemon_state_       = -1;  // daemon::EmbeddedDaemon::State as int

src/ui/windows/console_input_model.cpp

@@ -170,6 +170,10 @@ ConsoleRpcCall BuildConsoleRpcCall(const std::string& command)
                 call.params.push_back(parsed);
                 continue;
             }
+            // Malformed JSON — fail the whole command instead of silently sending it as a string.
+            call.valid = false;
+            call.error = "Argument " + std::to_string(argIndex) + " is not valid JSON: " + arg;
+            return call;
         }
 
         if (arg == "true") {

src/ui/windows/console_input_model.h

@@ -17,6 +17,7 @@ struct ConsoleRpcCall {
     bool valid = false;
     std::string method;
     nlohmann::json params = nlohmann::json::array();
+    std::string error;   // set (with valid=false) when an argument fails to parse
 };
 
 enum class ConsoleResultLineRole {

src/ui/windows/console_tab.cpp

@@ -1156,7 +1156,13 @@ void ConsoleTab::renderInput(ConsoleCommandExecutor& exec)
     // the darkened output panel above.
     {
         int darkA = static_cast<int>(schema::UI().drawElement("tabs.console", "bg-darken-alpha").sizeOr(110.0f));
-        dlIn->AddRectFilled(inMin, inMax, IM_COL32(0, 0, 0, darkA), Layout::glassRounding());
+        const bool barLight = IsLightTheme();
+        // Match the output panel: near-white terminal surface on light skins, dark on dark, with a
+        // 1px glass-rim outline along the bar's own edges (so the outline hugs the input, not inset).
+        dlIn->AddRectFilled(inMin, inMax, barLight ? IM_COL32(255, 255, 255, 205) : IM_COL32(0, 0, 0, darkA),
+                            Layout::glassRounding());
+        dlIn->AddRect(inMin, inMax, barLight ? IM_COL32(0, 0, 0, 45) : IM_COL32(255, 255, 255, 35),
+                      Layout::glassRounding(), 0, 1.0f);
     }
     
     // Center content vertically within glass panel
@@ -1223,10 +1229,12 @@ void ConsoleTab::renderInput(ConsoleCommandExecutor& exec)
         return 0;
     };
     
-    // Blend the field into the dark terminal bar: transparent frame, subtle hover/active.
+    // Transparent frame with a subtle hover/active tint (the outline lives on the terminal bar above,
+    // hugging the input's edges). Colors are theme-aware so they read on the light-skin console too.
+    const bool inputLight = material::IsLightTheme();
     ImGui::PushStyleColor(ImGuiCol_FrameBg,        IM_COL32(0, 0, 0, 0));
-    ImGui::PushStyleColor(ImGuiCol_FrameBgHovered, IM_COL32(255, 255, 255, 12));
-    ImGui::PushStyleColor(ImGuiCol_FrameBgActive,  IM_COL32(255, 255, 255, 18));
+    ImGui::PushStyleColor(ImGuiCol_FrameBgHovered, inputLight ? IM_COL32(0, 0, 0, 10) : IM_COL32(255, 255, 255, 12));
+    ImGui::PushStyleColor(ImGuiCol_FrameBgActive,  inputLight ? IM_COL32(0, 0, 0, 16) : IM_COL32(255, 255, 255, 18));
 
     const bool busy = exec.busy();
     if (busy) ImGui::BeginDisabled();
@@ -1243,6 +1251,25 @@ void ConsoleTab::renderInput(ConsoleCommandExecutor& exec)
         }
     }
     if (busy) ImGui::EndDisabled();
+
+    // Blinking terminal caret at the end of the current input. Shown when the field isn't actively
+    // being edited (ImGui draws its own caret while focused), so the console always reads as a live
+    // prompt. Monospace font => caret X = frame-padding + charWidth * length.
+    if (!busy && !ImGui::IsItemActive()) {
+        if (std::fmod(ImGui::GetTime(), 1.06) < 0.53) {
+            ImFont* mf = Type().mono();
+            float charW = mf->CalcTextSizeA(mf->LegacySize, FLT_MAX, 0, "M").x;
+            ImVec2 itMin = ImGui::GetItemRectMin();
+            ImVec2 itMax = ImGui::GetItemRectMax();
+            float caretW = std::max(2.0f, 2.0f * Layout::dpiScale());
+            float caretX = itMin.x + ImGui::GetStyle().FramePadding.x + charW * (float)strlen(input_buffer_);
+            caretX = std::min(caretX, itMax.x - ImGui::GetStyle().FramePadding.x - caretW);
+            float pad = (itMax.y - itMin.y) * 0.18f;
+            ImU32 caretCol = inputLight ? IM_COL32(0, 0, 0, 210) : IM_COL32(255, 255, 255, 210);
+            dlIn->AddRectFilled(ImVec2(caretX, itMin.y + pad), ImVec2(caretX + caretW, itMax.y - pad), caretCol);
+        }
+    }
+
     ImGui::PopStyleColor(3);
 
     ImGui::PopItemWidth();
@@ -1271,6 +1298,9 @@ bool ConsoleTab::submitConsoleCommand(ConsoleCommandExecutor& exec, const std::s
         std::transform(first.begin(), first.end(), first.begin(),
                        [](unsigned char c) { return static_cast<char>(std::tolower(c)); });
     }
+    // 'stop' shuts down the node — require a confirming second 'stop'; any other command clears the pending state.
+    static bool stopConfirmPending = false;
+    if (first != "stop") stopConfirmPending = false;
     auto add = [this](const std::string& l, ConsoleChannel c) { addLine(l, c); };
     if (first == "clear" || first == "cls") {
         // View-only clear — NEVER forwarded (the lite backend's `clear` wipes tx history).
@@ -1280,6 +1310,16 @@ bool ConsoleTab::submitConsoleCommand(ConsoleCommandExecutor& exec, const std::s
         exec.printHelp(add);
     } else if (first == "quit" || first == "exit") {
         addLine(TR("console_quit_note"), ConsoleChannel::Info);
+    } else if (first == "stop") {
+        if (!stopConfirmPending) {
+            stopConfirmPending = true;
+            addLine("'stop' will shut down the node and disconnect the wallet. Type 'stop' again to confirm.",
+                    ConsoleChannel::Warning);
+        } else {
+            stopConfirmPending = false;
+            if (!exec.isReady()) addLine(TR("console_not_connected"), ConsoleChannel::Error);
+            else                 exec.submit(cmd);
+        }
     } else if (!exec.isReady()) {
         addLine(TR("console_not_connected"), ConsoleChannel::Error);
     } else {

src/ui/windows/daemon_download_dialog.h

@@ -62,12 +62,14 @@ public:
         }
         using namespace material;
         const float dp = Layout::dpiScale();
+        const auto p = s_updater->getProgress();
+        // No window X during an active download/verify/extract — closing would orphan/block on the
+        // worker; the in-dialog Cancel is the intended way to abort.
+        const bool active = (p.state == St::Downloading || p.state == St::Verifying || p.state == St::Extracting);
         OverlayDialogSpec ov;
-        ov.title = TR("daemon_update_title"); ov.p_open = &s_open;
+        ov.title = TR("daemon_update_title"); ov.p_open = active ? nullptr : &s_open;
         ov.style = OverlayStyle::BlurFloat; ov.cardWidth = 480.0f; ov.cardBottomViewportRatio = 0.94f;
         if (BeginOverlayDialog(ov)) {
-            const auto p = s_updater->getProgress();
-            using St = util::DaemonUpdater::State;
             switch (p.state) {
             case St::Checking:        renderChecking(dp, p); break;
             case St::UpToDate:

src/ui/windows/export_all_keys_dialog.cpp

@@ -177,9 +177,9 @@ void ExportAllKeysDialog::render(App* app)
                                     if (result.is_string()) {
                                         keys += "# Address: " + addr + "\n";
                                         keys += result.get<std::string>() + "\n\n";
+                                        exported++;   // count only real successes (locked/failed keys don't count)
                                     }
                                 } catch (...) {}
-                                exported++;
                             }
                         }
                         
@@ -193,17 +193,18 @@ void ExportAllKeysDialog::render(App* app)
                                     if (result.is_string()) {
                                         keys += "# Address: " + addr + "\n";
                                         keys += result.get<std::string>() + "\n\n";
+                                        exported++;   // count only real successes (locked/failed keys don't count)
                                     }
                                 } catch (...) {}
-                                exported++;
                             }
                         }
                         
-                        // Save to file (still on worker thread)
+                        // Only write a file if we actually exported keys — a keyless file would be a
+                        // misleading "export" (the usual cause of 0 keys is an encrypted+locked wallet).
                         std::string configDir = util::Platform::getConfigDir();
                         std::string filepath = configDir + "/" + filename;
                         bool writeOk = false;
-                        {
+                        if (exported > 0) {
                             std::ofstream file(filepath);
                             if (file.is_open()) {
                                 file << keys;
@@ -215,12 +216,22 @@ void ExportAllKeysDialog::render(App* app)
                         return [exported, total, filepath, writeOk]() {
                             s_exported_count = exported;
                             s_exporting = false;
-                            if (writeOk) {
-                                s_status = "Exported to: " + filepath;
-                                Notifications::instance().success(TR("export_keys_success"), 5.0f);
-                            } else {
+                            if (exported == 0) {
+                                s_status = "No keys exported (0 of " + std::to_string(total) +
+                                           ") — unlock the wallet (if encrypted) and try again.";
+                                Notifications::instance().error("No keys could be exported — is the wallet unlocked?");
+                            } else if (!writeOk) {
                                 s_status = "Failed to write file";
                                 Notifications::instance().error("Failed to save key file");
+                            } else if (exported < total) {
+                                s_status = "Exported " + std::to_string(exported) + " of " +
+                                           std::to_string(total) + " keys to: " + filepath +
+                                           "  (INCOMPLETE — some addresses had no spending key or the wallet is locked)";
+                                Notifications::instance().warning("Partial export: " + std::to_string(exported) +
+                                           " of " + std::to_string(total) + " keys");
+                            } else {
+                                s_status = "Exported to: " + filepath;
+                                Notifications::instance().success(TR("export_keys_success"), 5.0f);
                             }
                         };
                     });

src/ui/windows/mining_controls.cpp

@@ -690,8 +690,12 @@ void RenderMiningControls(App* app, const WalletState& state, const MiningInfo&
             // If pool mining is still shutting down after switching to solo,
             // keep the button enabled so user can stop it.
             bool poolStillRunning = !s_pool_mode && state.pool_mining.xmrig_running;
+            // Can't start pool mining without a payout address (blank for a new wallet with no z-address);
+            // only blocks starting — stopping a running miner stays enabled.
+            bool poolNeedsPayout = s_pool_mode && !state.pool_mining.xmrig_running &&
+                                   std::string(s_pool_worker).empty();
             bool disabled = s_pool_mode
-                ? (isToggling || poolBlockedBySolo)
+                ? (isToggling || poolBlockedBySolo || poolNeedsPayout)
                 : (poolStillRunning ? false : (!app->isConnected() || isToggling || isSyncing));
 
             // Glass panel background with state-dependent tint
@@ -821,6 +825,8 @@ void RenderMiningControls(App* app, const WalletState& state, const MiningInfo&
                     material::Tooltip(TR("mining_syncing_tooltip"), state.sync.verification_progress * 100.0);
                 else if (poolBlockedBySolo)
                     material::Tooltip("%s", TR("mining_stop_solo_for_pool"));
+                else if (poolNeedsPayout)
+                    material::Tooltip("%s", "Enter a payout address first (generate a Z address)");
                 else
                     material::Tooltip("%s", isMiningActive ? TR("stop_mining") : TR("start_mining"));
             }

src/ui/windows/mining_stats.cpp

@@ -315,7 +315,7 @@ static void RenderLeftPoolCard(App* app, const WalletState& state, ImDrawList* d
 
             char right[64];
             std::string hrStr = haveHr ? FormatHashrate(it->second.hashrateHs) : std::string("—");
-            snprintf(right, sizeof(right), "%s  %.0f%%", hrStr.c_str(), kp.feePercent);
+            snprintf(right, sizeof(right), "%s  %.0f%% fee", hrStr.c_str(), kp.feePercent);
             ImVec2 rSz = capFont->CalcTextSizeA(capFont->LegacySize, FLT_MAX, 0, right);
             cdl->AddText(capFont, capFont->LegacySize,
                          ImVec2(rMax.x - rSz.x - 6 * dp, textY), OnSurfaceMedium(), right);
@@ -374,7 +374,8 @@ void RenderMiningStats(const WalletState& state, const MiningInfo& mining,
             float cardH = std::max(leftContentH, statRowH + chartBudgetH + pad);
 
             ImVec2 cardMin = ImGui::GetCursorScreenPos();
-            float leftW  = std::clamp(availWidth * 0.25f, 180.0f * dp, availWidth * 0.45f);
+            // A bit wider than the old 25%/180dp so the pool rows fit the "<hashrate>  N% fee" text.
+            float leftW  = std::clamp(availWidth * 0.30f, 210.0f * dp, availWidth * 0.45f);
             float colGap = gap;
             float rightW = availWidth - leftW - colGap;
 

src/ui/windows/mining_tab.cpp

@@ -199,8 +199,19 @@ static void RenderMiningTabContent(App* app)
 
     // Persist pool settings when dirty and no field is active
     if (s_pool_settings_dirty && !ImGui::IsAnyItemActive()) {
-        app->settings()->setPoolUrl(s_pool_url);
-        app->settings()->setPoolWorker(s_pool_worker);
+        // Trim whitespace/newlines (a pasted URL or payout address often carries a trailing newline)
+        // before persisting and feeding it to xmrig; write the trimmed value back so the field agrees.
+        auto trimmed = [](const char* b) {
+            std::string s(b);
+            while (!s.empty() && (s.front()==' '||s.front()=='\t'||s.front()=='\n'||s.front()=='\r')) s.erase(s.begin());
+            while (!s.empty() && (s.back()==' '||s.back()=='\t'||s.back()=='\n'||s.back()=='\r')) s.pop_back();
+            return s;
+        };
+        std::string poolUrl = trimmed(s_pool_url), poolWorker = trimmed(s_pool_worker);
+        snprintf(s_pool_url, sizeof(s_pool_url), "%s", poolUrl.c_str());
+        snprintf(s_pool_worker, sizeof(s_pool_worker), "%s", poolWorker.c_str());
+        app->settings()->setPoolUrl(poolUrl);
+        app->settings()->setPoolWorker(poolWorker);
         app->settings()->save();
         s_pool_settings_dirty = false;
 

src/ui/windows/network_tab.cpp

@@ -178,7 +178,13 @@ void RenderLiteNetworkTab(App* app)
         ImGui::InputTextWithHint("##LiteAddLabel", TR("lite_net_add_label_hint"), s_addLabel, sizeof(s_addLabel));
         ImGui::SameLine();
         if (TactileButton(TR("lite_net_add"), ImVec2(addBtnW, 0))) {
-            std::string url = s_addUrl;
+            auto trimStr = [](std::string s) {
+                while (!s.empty() && (s.front()==' '||s.front()=='\t'||s.front()=='\n'||s.front()=='\r')) s.erase(s.begin());
+                while (!s.empty() && (s.back()==' '||s.back()=='\t'||s.back()=='\n'||s.back()=='\r')) s.pop_back();
+                return s;
+            };
+            std::string url = trimStr(s_addUrl);
+            std::string addLabel = trimStr(s_addLabel);
             if (!wallet::isLiteServerUrlUsable(url)) {
                 s_addError = TR("lite_net_invalid_url");
             } else {
@@ -188,7 +194,7 @@ void RenderLiteNetworkTab(App* app)
                 if (!exists) {
                     config::Settings::LiteServerPreference p;
                     p.url = url;
-                    p.label = s_addLabel[0] ? std::string(s_addLabel) : url;
+                    p.label = !addLabel.empty() ? addLabel : url;
                     p.enabled = true;
                     servers.push_back(p);
                     st->setLiteServers(servers);

src/ui/windows/receive_tab.cpp

@@ -12,6 +12,7 @@
 #include "../../app.h"
 #include "../../config/settings.h"
 #include "../../util/i18n.h"
+#include "../../util/payment_uri.h"
 #include "../../util/platform.h"
 #include "../../util/text_format.h"
 #include "../../config/version.h"
@@ -365,6 +366,7 @@ static void RenderRecentReceived(const AddressInfo& /* addr */,
         if (tx.type != "receive" && tx.type != "mined") continue;
         recvs.push_back(&tx);
     }
+    if (recvs.size() > 4) recvs.resize(4);  // show only the 4 most recent (newest-first)
 
     float listH = std::max(rowH, ImGui::GetContentRegionAvail().y);
 
@@ -539,11 +541,10 @@ void RenderReceiveTab(App* app)
     // Generate QR data
     std::string qr_data = selected.address;
     if (s_request_amount > 0) {
-        qr_data = std::string("dragonx:") + selected.address +
-                  "?amount=" + std::to_string(s_request_amount);
-        if (s_request_memo[0] && isZ) {
-            qr_data += "&memo=" + std::string(s_request_memo);
-        }
+        // Canonical, URL-encoded "drgx:" URI via the shared builder. The old inline code emitted an
+        // unparseable "dragonx:" scheme and appended the memo raw (spaces/&/= corrupted the QR).
+        qr_data = util::buildPaymentUri(selected.address, s_request_amount, "",
+                                        (s_request_memo[0] && isZ) ? std::string(s_request_memo) : std::string());
     }
     if (qr_data != s_cached_qr_data) {
         if (s_qr_texture) {

src/ui/windows/request_payment_dialog.cpp

@@ -5,6 +5,7 @@
 #include "request_payment_dialog.h"
 #include "../../app.h"
 #include "../../util/i18n.h"
+#include "../../util/payment_uri.h"
 #include "../notifications.h"
 #include "../schema/ui_schema.h"
 #include "../widgets/qr_code.h"
@@ -34,59 +35,8 @@ static bool s_uri_dirty = true;
 // Helper to build payment URI
 static std::string buildPaymentUri()
 {
-    if (s_address[0] == '\0') return "";
-    
-    std::ostringstream uri;
-    uri << "drgx:" << s_address;
-    
-    bool hasParams = false;
-    auto addParam = [&](const char* key, const std::string& value) {
-        if (value.empty()) return;
-        uri << (hasParams ? "&" : "?") << key << "=" << value;
-        hasParams = true;
-    };
-    
-    if (s_amount > 0) {
-        std::ostringstream amt;
-        amt << std::fixed << std::setprecision(8) << s_amount;
-        addParam("amount", amt.str());
-    }
-    
-    if (s_label[0] != '\0') {
-        // URL encode label
-        std::string encoded;
-        for (char c : std::string(s_label)) {
-            if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
-                encoded += c;
-            } else if (c == ' ') {
-                encoded += "%20";
-            } else {
-                char hex[4];
-                snprintf(hex, sizeof(hex), "%%%02X", (unsigned char)c);
-                encoded += hex;
-            }
-        }
-        addParam("label", encoded);
-    }
-    
-    if (s_memo[0] != '\0') {
-        // URL encode memo
-        std::string encoded;
-        for (char c : std::string(s_memo)) {
-            if (isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
-                encoded += c;
-            } else if (c == ' ') {
-                encoded += "%20";
-            } else {
-                char hex[4];
-                snprintf(hex, sizeof(hex), "%%%02X", (unsigned char)c);
-                encoded += hex;
-            }
-        }
-        addParam("memo", encoded);
-    }
-    
-    return uri.str();
+    // Route through the shared builder so this dialog and the receive tab can't diverge on scheme/encoding.
+    return dragonx::util::buildPaymentUri(s_address, s_amount, s_label, s_memo);
 }
 
 void RequestPaymentDialog::show(const std::string& address)

src/ui/windows/send_tab.cpp

@@ -794,9 +794,20 @@ void RenderSendConfirmPopup(App* app) {
             Type().text(TypeStyle::Body2, TR("sending"));
         } else {
             if (TactileButton(TR("confirm_and_send"), ImVec2(S.button("tabs.send", "confirm-button").width, std::max(schema::UI().drawElement("tabs.send", "confirm-btn-min-height").size, schema::UI().drawElement("tabs.send", "confirm-btn-base-height").size * popVs)), S.resolveFont(S.button("tabs.send", "confirm-button").font))) {
+              // Re-validate against LIVE state — the confirm dialog persists across frames, so the
+              // balance could have dropped or sync (re)started (or the fee bumped total over available)
+              // since Review. Don't broadcast a now-invalid transaction.
+              const auto& liveState = app->getWalletState();
+              double liveAvail = GetAvailableBalance(app);
+              if (!app->isConnected() || liveState.sync.syncing || s_amount <= 0 ||
+                  (s_amount + s_fee) > liveAvail) {
+                s_tx_status = "Cannot send now — check connection, sync, and available balance.";
+                s_status_success = false;
+                s_status_timestamp = ImGui::GetTime();
+              }
               // A locked encrypted lite wallet can't spend; prompt to unlock instead of sending
               // (the backend would otherwise reject with "Wallet is locked").
-              if (app->liteWallet() && app->getWalletState().isLocked()) {
+              else if (app->liteWallet() && app->getWalletState().isLocked()) {
                 app->requestLiteUnlock();
               } else {
                 s_sending = true;
@@ -889,12 +900,19 @@ static void RenderActionButtons(App* app, float width, float vScale,
     auto& S = schema::UI();
     const auto& state = app->getWalletState();
     double total = s_amount + s_fee;
+    // Block spending from a view-only source (imported viewing key, no spending key) — it would only
+    // fail at submit. Defaults to spendable if the address isn't in the loaded list yet.
+    bool sourceSpendable = true;
+    for (const auto& a : state.addresses) {
+        if (a.address == s_from_address) { sourceSpendable = a.has_spending_key; break; }
+    }
     bool can_send = app->isConnected() &&
                     !state.sync.syncing &&
                     is_valid_address &&
                     s_amount > 0 &&
                     s_from_address[0] != '\0' &&
                     total <= available &&
+                    sourceSpendable &&
                     !s_sending;
 
     float btnGap = Layout::spacingMd();
@@ -934,6 +952,8 @@ static void RenderActionButtons(App* app, float width, float vScale,
             material::Tooltip("%s", TR("send_tooltip_enter_amount"));
         else if (total > available)
             material::Tooltip("%s", TR("send_tooltip_exceeds_balance"));
+        else if (!sourceSpendable)
+            material::Tooltip("%s", "View-only address — no spending key, cannot send");
         else if (s_sending)
             material::Tooltip("%s", TR("send_tooltip_in_progress"));
     }
@@ -1025,6 +1045,7 @@ static void RenderRecentSends(const WalletState& state, float width, ImFont* cap
         if (tx.type != "send" && tx.type != "shield") continue;
         sends.push_back(&tx);
     }
+    if (sends.size() > 4) sends.resize(4);  // show only the 4 most recent (newest-first)
 
     float listH = std::max(rowH, ImGui::GetContentRegionAvail().y);
 
@@ -1321,7 +1342,8 @@ void RenderSendTab(App* app)
                 // USD input mode — no step buttons (step=0)
                 ImGui::PushItemWidth(amtInputW);
                 if (ImGui::InputDouble("##AmountUSD", &s_usd_amount, 0, 0, "$%.2f")) {
-                    s_amount = s_usd_amount / market.price_usd;
+                    // Normalize to 8dp (satoshi precision) so the reviewed/sent DRGX matches the preview.
+                    s_amount = std::round((s_usd_amount / market.price_usd) * 1e8) / 1e8;
                 }
                 // Draw DRGX equivalent inside the input field (right-aligned overlay)
                 {
@@ -1342,6 +1364,9 @@ void RenderSendTab(App* app)
                 // DRGX input mode — no step buttons (step=0)
                 ImGui::PushItemWidth(amtInputW);
                 if (ImGui::InputDouble("##Amount", &s_amount, 0, 0, "%.8f")) {
+                    // Normalize to 8dp so digits past satoshi precision aren't silently dropped at send.
+                    s_amount = std::round(s_amount * 1e8) / 1e8;
+                    if (s_amount < 0) s_amount = 0;
                     if (market.price_usd > 0)
                         s_usd_amount = s_amount * market.price_usd;
                 }
@@ -1434,9 +1459,13 @@ void RenderSendTab(App* app)
                 ImVec2(colW, memoInputH));
             ImGui::PopItemWidth();
 
+            // The Sapling memo limit is in BYTES (multi-byte UTF-8 fills it faster than visible chars);
+            // warn in colour once the field is at its cap so it's clear input has stopped being accepted.
             size_t memo_len = strlen(s_memo);
-            snprintf(buf, sizeof(buf), "%zu / %d", memo_len, (int)S.drawElement("business", "memo-max-length").size);
-            Type().textColored(TypeStyle::Caption, OnSurfaceDisabled(), buf);
+            size_t memoMax = (size_t)S.drawElement("business", "memo-max-length").size;
+            bool memoAtCap = memo_len + 1 >= memoMax;
+            snprintf(buf, sizeof(buf), "%zu / %zu bytes", memo_len, memoMax);
+            Type().textColored(TypeStyle::Caption, memoAtCap ? Warning() : OnSurfaceDisabled(), buf);
         }
 
         // Divider before action buttons

src/ui/windows/shield_dialog.cpp

@@ -129,6 +129,10 @@ void ShieldDialog::render(App* app)
             }
             ImGui::EndCombo();
         }
+        if (state.z_addresses.empty()) {
+            material::Type().textColored(material::TypeStyle::Caption, material::Warning(),
+                "No shielded (z) address yet — create one on the Receive tab first.");
+        }
 
         ImGui::Spacing();
 
@@ -166,8 +170,11 @@ void ShieldDialog::render(App* app)
             ImGui::Spacing();
         }
 
-        // Buttons
-        bool can_submit = !s_operation_pending && s_to_address[0] != '\0';
+        // Buttons — guard on connection/sync like the Send tab (a disconnected or mid-sync submit just
+        // fails at the daemon with a raw error).
+        bool sh_connected = app->isConnected();
+        bool sh_syncing   = state.sync.syncing;
+        bool can_submit = !s_operation_pending && s_to_address[0] != '\0' && sh_connected && !sh_syncing;
 
         if (!can_submit) ImGui::BeginDisabled();
         
@@ -244,6 +251,11 @@ void ShieldDialog::render(App* app)
         }
         
         if (!can_submit) ImGui::EndDisabled();
+        if (!can_submit && ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenDisabled)) {
+            if (!sh_connected)              material::Tooltip("%s", TR("send_tooltip_not_connected"));
+            else if (sh_syncing)           material::Tooltip("%s", TR("send_tooltip_syncing"));
+            else if (s_to_address[0]=='\0') material::Tooltip("%s", TR("shield_select_z"));
+        }
 
         ImGui::SameLine();
         

src/ui/windows/validate_address_dialog.cpp

@@ -80,6 +80,9 @@ void ValidateAddressDialog::render(App* app)
             s_error_message.clear();
             
             std::string address(s_address_input);
+            // Trim whitespace/newlines a pasted address often carries (the daemon would reject it).
+            while (!address.empty() && (address.front()==' '||address.front()=='\t'||address.front()=='\n'||address.front()=='\r')) address.erase(address.begin());
+            while (!address.empty() && (address.back()==' '||address.back()=='\t'||address.back()=='\n'||address.back()=='\r')) address.pop_back();
 
             // Determine if z-address or t-address
             bool is_zaddr = !address.empty() && address[0] == 'z';

src/ui/windows/xmrig_download_dialog.h

@@ -51,12 +51,14 @@ public:
         }
         using namespace material;
         const float dp = Layout::dpiScale();
+        const auto p = s_updater->getProgress();
+        // No window X during an active download/verify/extract — closing would orphan/block on the
+        // worker; the in-dialog Cancel is the intended way to abort.
+        const bool active = (p.state == St::Downloading || p.state == St::Verifying || p.state == St::Extracting);
         OverlayDialogSpec ov;
-        ov.title = TR("xmrig_update_title"); ov.p_open = &s_open;
+        ov.title = TR("xmrig_update_title"); ov.p_open = active ? nullptr : &s_open;
         ov.style = OverlayStyle::BlurFloat; ov.cardWidth = 480.0f; ov.cardBottomViewportRatio = 0.94f;
         if (BeginOverlayDialog(ov)) {
-            const auto p = s_updater->getProgress();
-            using St = util::XmrigUpdater::State;
             switch (p.state) {
             case St::Checking:        renderChecking(dp, p); break;
             case St::UpToDate:

src/util/bootstrap.cpp

@@ -724,9 +724,13 @@ bool Bootstrap::verifyChecksums(const std::string& zipPath, const std::string& b
     bool haveMD5    = !md5Content.empty();
 
     if (!haveSHA256 && !haveMD5) {
-        DEBUG_LOGF("[Bootstrap] Warning: no checksum files available — skipping verification\n");
-        // Allow the process to continue (server may not have checksum files yet)
-        return true;
+        // Fail CLOSED: refuse to install an unverified multi-GB archive (mirrors the xmrig/daemon
+        // updaters, which refuse when no checksum is published). Trusting an unverified download of
+        // this size is a real integrity/security risk; a missing checksum is a server-side gap to fix.
+        DEBUG_LOGF("[Bootstrap] No checksum published — refusing to install an unverified archive\n");
+        setProgress(State::Failed, "Verification failed: no checksum was published for the bootstrap. "
+                                   "Refusing to install an unverified archive.");
+        return false;
     }
 
     // Determine progress ranges: if both checksums exist, split 0-50% / 50-100%

src/util/payment_uri.cpp

@@ -5,12 +5,58 @@
 #include "payment_uri.h"
 
 #include <sstream>
+#include <iomanip>
 #include <algorithm>
 #include <cctype>
+#include <cstdio>
 
 namespace dragonx {
 namespace util {
 
+std::string urlEncode(const std::string& value)
+{
+    std::string out;
+    out.reserve(value.size());
+    for (unsigned char c : value) {
+        if (std::isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
+            out += static_cast<char>(c);
+        } else if (c == ' ') {
+            out += "%20";
+        } else {
+            char hex[4];
+            std::snprintf(hex, sizeof(hex), "%%%02X", c);
+            out += hex;
+        }
+    }
+    return out;
+}
+
+std::string buildPaymentUri(const std::string& address, double amount,
+                            const std::string& label, const std::string& memo)
+{
+    if (address.empty()) return "";
+
+    std::ostringstream uri;
+    uri << "drgx:" << address;
+
+    bool hasParams = false;
+    auto addParam = [&](const char* key, const std::string& value) {
+        if (value.empty()) return;
+        uri << (hasParams ? "&" : "?") << key << "=" << value;
+        hasParams = true;
+    };
+
+    if (amount > 0.0) {
+        std::ostringstream amt;
+        amt << std::fixed << std::setprecision(8) << amount;
+        addParam("amount", amt.str());
+    }
+    addParam("label", urlEncode(label));
+    addParam("memo", urlEncode(memo));
+
+    return uri.str();
+}
+
 std::string urlDecode(const std::string& encoded)
 {
     std::string result;

src/util/payment_uri.h

@@ -40,6 +40,21 @@ PaymentURI parsePaymentURI(const std::string& uri);
  */
 std::string urlDecode(const std::string& encoded);
 
+/**
+ * @brief URL-encode a string (RFC 3986 unreserved kept; ' ' -> %20; others -> %HH).
+ */
+std::string urlEncode(const std::string& value);
+
+/**
+ * @brief Build a canonical DragonX payment URI: drgx:<address>[?amount=..&label=..&memo=..],
+ *        with query parameters URL-encoded. amount<=0 and empty label/memo are omitted.
+ *
+ * Single source of truth so the receive tab and the request-payment dialog can't diverge on the
+ * scheme or encoding (the receive tab previously emitted an unparseable "dragonx:" URI with a raw memo).
+ */
+std::string buildPaymentUri(const std::string& address, double amount = 0.0,
+                            const std::string& label = "", const std::string& memo = "");
+
 /**
  * @brief Check if a string is a valid payment URI
  * @param str String to check