Фикс: код как ввёл пользователь + последнее выбранное хранилище

- CodeBlock: <pre> white-space:pre-wrap + TextEdit RichText, без ScrollView, implicitHeight contentHeight+20 — весь код виден целиком, как ввёл, не в одну строку; только иконка 📋
- MainWindow: vaultSwitcher теперь vaultManager.selectVault(modelData) перед openWindow, main.cpp connect windowOpened -> setCurrentVault — запуск с последним выбранным, а не добавленным; проверено на /Users/alex/Nextcloud/test и test-vault
- Tests: vault_select_test + mdparser parseBlocks

tests/vault_select_test.cpp

@@ -0,0 +1,36 @@
+#include <QCoreApplication>
+#include <QTemporaryDir>
+#include <QSettings>
+#include <QDir>
+#include <cstdio>
+#include "core/SettingsStore.h"
+#include "app/VaultManager.h"
+#include "git/GitManager.h"
+int main(int argc, char *argv[]){
+    QCoreApplication app(argc, argv);
+    app.setOrganizationName("TestVault");
+    app.setApplicationName("test");
+    QTemporaryDir dir;
+    if(!dir.isValid()) return 1;
+    QSettings::setPath(QSettings::IniFormat, QSettings::UserScope, dir.path());
+    QSettings::setDefaultFormat(QSettings::IniFormat);
+    SettingsStore s;
+    GitManager g;
+    VaultManager vm(&s, &g);
+    QString v1 = dir.path() + "/vault1";
+    QString v2 = dir.path() + "/vault2";
+    if(!vm.createVault(v1).isEmpty()) return 1;
+    if(s.currentVault() != QDir::cleanPath(v1)) { std::fprintf(stderr,"FAIL v1 current %s\n", qPrintable(s.currentVault())); return 1; }
+    if(!vm.createVault(v2).isEmpty()) return 1;
+    if(s.currentVault() != QDir::cleanPath(v2)) return 1;
+    s.setCurrentVault(v1);
+    if(s.currentVault() != QDir::cleanPath(v1)) return 1;
+    {
+        SettingsStore s2;
+        if(s2.currentVault() != QDir::cleanPath(v1)) { std::fprintf(stderr,"FAIL restart current %s\n", qPrintable(s2.currentVault())); return 1; }
+        if(s2.vaults().size()!=2) return 1;
+        if(s2.vaults()[0] != QDir::cleanPath(v2)) return 1;
+    }
+    std::printf("VAULT SELECT TEST OK\n");
+    return 0;
+}