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/qtsvg/source/examples/svg/svgviewer/svgview.h

@@ -0,0 +1,56 @@
+// Copyright (C) 2025 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef SVGVIEW_H
+#define SVGVIEW_H
+
+#include <QWidget>
+#include <QSvgRenderer>
+
+class SvgView : public QWidget
+{
+    Q_OBJECT
+public:
+    enum Background {
+        Black,
+        White,
+        Chequered
+    };
+
+    enum Feature {
+        Tiny_12,
+        Extended,
+    };
+
+    explicit SvgView(QWidget *parent = nullptr);
+    void paintEvent(QPaintEvent *event) override;
+    QImage renderAsImage(QSize imageSize);
+
+    void setBackgroundType(Background type);
+    void setFeature(Feature feature);
+    void setScale(qreal scale);
+
+    void restartAnimations();
+
+    void load(QStringView fileName);
+    void reload();
+    QStringView currentFile() const;
+
+    QSize fileSize() const;
+    QSize sizeHint() const override;
+
+public slots:
+    void setAnimations(bool enable);
+    void setAssumeTrustedSource(bool enable);
+    void setOutline(bool enable);
+
+private:
+    QPixmap m_chequered;
+    Background m_background;
+    QSvgRenderer m_renderer;
+    qreal m_scale = 1.0;
+    QString m_fileName;
+    bool m_outline = true;
+};
+
+#endif // SVGVIEW_H