fix: comprehensive boot warnings and exceptions — fixable silenced, unfixable diagnosed

Build system (5 gaps hardened):
- COOKBOOK_OFFLINE defaults to true (fork-mode)
- normalize_patch handles diff -ruN format
- New 'repo validate-patches' command (25/25 relibc patches)
- 14 patched Qt/Wayland/display recipes added to protected list
- relibc archive regenerated with current patch chain

Boot fixes (fixable):
- Full ISO EFI partition: 16 MiB → 1 MiB (matches mini, BIOS hardcoded 2 MiB offset)
- D-Bus system bus: absolute /usr/bin/dbus-daemon path (was skipped)
- redbear-sessiond: absolute /usr/bin/redbear-sessiond path (was skipped)
- daemon framework: silenced spurious INIT_NOTIFY warnings for oneshot_async services (P0-daemon-silence-init-notify.patch)
- udev-shim: demoted INIT_NOTIFY warning to INFO (expected for oneshot_async)
- relibc: comprehensive named semaphores (sem_open/close/unlink) replacing upstream todo!() stubs
- greeterd: Wayland socket timeout 15s → 30s (compositor DRM wait)
- greeter-ui: built and linked (header guard unification, sem_compat stubs removed)
- mc: un-ignored in both configs, fixed glib/libiconv/pcre2 transitive deps
- greeter config: removed stale keymapd dependency from display/greeter services
- prefix toolchain: relibc headers synced, _RELIBC_STDLIB_H guard unified

Unfixable (diagnosed, upstream):
- i2c-hidd: abort on no-I2C-hardware (QEMU) — process::exit → relibc abort
- kded6/greeter-ui: page fault 0x8 — Qt library null deref
- Thread panics fd != -1 — Rust std library on Redox
- DHCP timeout / eth0 MAC — QEMU user-mode networking
- hwrngd/thermald — no hardware RNG/thermal in VM
- live preload allocation — BIOS memory fragmentation, continues on demand

local/recipes/qt/qtbase/source/examples/sql/sqlbrowser/browser.h

@@ -0,0 +1,71 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BROWSER_H
+#define BROWSER_H
+
+#include <QWidget>
+#include <QSqlTableModel>
+
+#include <memory>
+
+QT_FORWARD_DECLARE_CLASS(QSqlError)
+
+QT_BEGIN_NAMESPACE
+namespace Ui
+{
+class Browser;
+}
+QT_END_NAMESPACE
+
+class Browser : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit Browser(QWidget *parent = nullptr);
+    ~Browser() override;
+
+    QSqlError addConnection(const QString &driver, const QString &dbName, const QString &host,
+                            const QString &user, const QString &passwd, int port);
+
+public slots:
+    void openNewConnectionDialog();
+    void about();
+
+protected:
+    void insertRow();
+    void deleteRow();
+    void updateActions();
+
+protected slots:
+    void exec();
+    void showTable(const QString &table);
+    void showMetaData(const QString &table);
+
+    void onFieldStrategyAction();
+    void onRowStrategyAction();
+    void onManualStrategyAction();
+    void onSubmitButton();
+    void onClearButton();
+
+signals:
+    void statusMessage(const QString &message);
+
+private:
+    const std::unique_ptr<Ui::Browser> m_ui;
+};
+
+class CustomModel : public QSqlTableModel
+{
+    Q_OBJECT
+public:
+    using QSqlTableModel::QSqlTableModel;
+    QVariant data(const QModelIndex &idx, int role) const override
+    {
+        if (role == Qt::BackgroundRole && isDirty(idx))
+            return QBrush(QColor(Qt::yellow));
+        return QSqlTableModel::data(idx, role);
+    }
+};
+
+#endif