Runtime sampler change frees a VkSampler still referenced by in-flight command buffers #153

src/Graphics/Vulkan/VulkanTexture.cpp:216-244 (:219, :229, :239), :246-267, :270-274

SetFilter, SetWrapMode and SetLodBias each call vkDestroySampler immediately (lines 219, 229, 239)
and then rewrite descriptor sets (UpdateDescriptorSets, :246-267): with no vkDeviceWaitIdle and no
fence gate, while up to MAX_FRAMES_IN_FLIGHT command buffers referencing the old sampler are still
pending. Violates VUID-vkDestroySampler-sampler-01082.

Trigger: the Filter combo at SleakCraft/Game/src/UI/SettingsPanel.cpp:280 and LOD Bias at :287: i.e. a
user changing texture filtering in the settings panel.

Second-order and permanent: m_imguiDescriptorSet is created once (VulkanTexture.cpp:270-274) and never
refreshed by UpdateDescriptorSets. So after any filter change, every ImGui draw of that texture samples a
destroyed sampler for the rest of the session.

Severity: crash.

Found by a full audit of the graphics layer. Assessed severity: crash.