0.1.26-alpha release

* refactor: render chat rows from presentation state

* Fix Meshtastic channel sync and add MeshCore CN preset

* Add granular chat notification settings

* Add SD settings backup and restore

* Prepare 0.1.26-alpha release

---------

Co-authored-by: vicliu624 <vicliu@outlook.com>

apps/linux_sim_shell/src/linux_sim_runtime_renderer.cpp

@@ -0,0 +1,79 @@
+#include "linux_sim_runtime_renderer.h"
+
+namespace trailmate::apps::linux_sim_shell
+{
+
+bool LinuxSimRuntimeRenderer::render(const LinuxSimRuntimeEntry& entry)
+{
+    ready_ = false;
+    primary_ = false;
+    fallback_ = true;
+
+    if (entry.usingPrimaryScreenGraph())
+    {
+        ready_ = descriptor_renderer_.render(entry.adoption());
+        primary_ = ready_;
+        fallback_ = !ready_;
+        return ready_;
+    }
+
+    if (entry.fallbackUsed())
+    {
+        return renderFallback(entry);
+    }
+
+    return false;
+}
+
+bool LinuxSimRuntimeRenderer::renderFallback(const LinuxSimRuntimeEntry&)
+{
+    // Phase 11 fallback: old hardcoded ASCII rendering remains available only
+    // when the runtime entry did not provide primary descriptors.
+    ready_ = false;
+    primary_ = false;
+    fallback_ = true;
+    return false;
+}
+
+bool LinuxSimRuntimeRenderer::ready() const noexcept
+{
+    return ready_;
+}
+
+bool LinuxSimRuntimeRenderer::usingPrimaryScreenGraph() const noexcept
+{
+    return primary_;
+}
+
+bool LinuxSimRuntimeRenderer::usedPrimaryScreenGraph() const noexcept
+{
+    return primary_;
+}
+
+bool LinuxSimRuntimeRenderer::fallbackUsed() const noexcept
+{
+    return fallback_;
+}
+
+bool LinuxSimRuntimeRenderer::usedFallback() const noexcept
+{
+    return fallback_;
+}
+
+std::size_t LinuxSimRuntimeRenderer::lineCount() const noexcept
+{
+    return ready_ ? descriptor_renderer_.lineCount() : 0;
+}
+
+const trailmate::linux_sim::AsciiRenderLine*
+LinuxSimRuntimeRenderer::lines() const noexcept
+{
+    return ready_ ? descriptor_renderer_.lines() : nullptr;
+}
+
+const char* LinuxSimRuntimeRenderer::line(std::size_t index) const noexcept
+{
+    return ready_ ? descriptor_renderer_.line(index) : nullptr;
+}
+
+} // namespace trailmate::apps::linux_sim_shell