fix(viewport): clip text to stencil

src/scene/pipeline/mod.rs

@@ -1473,7 +1473,14 @@ impl Pipeline {
         // ── Text (SDF glyph quads) ─────────────────────────────────────────
         let text_atlas_bgl = text_gpu::TextAtlasGpu::bind_group_layout(device);
         let (text_pipeline, text_highlight_pipeline) =
-            text_gpu::create_pipelines(device, &frame_bgl, &text_atlas_bgl, format, MSAA_SAMPLES);
+            text_gpu::create_pipelines(
+                device,
+                &frame_bgl,
+                &text_atlas_bgl,
+                format,
+                MSAA_SAMPLES,
+                &content_stencil,
+            );
 
         let viewcube = ViewCubePipeline::new(device, queue, format);
 

src/scene/pipeline/text_gpu.rs

@@ -260,6 +260,7 @@ pub fn create_pipelines(
     atlas_bgl: &wgpu::BindGroupLayout,
     color_format: wgpu::TextureFormat,
     sample_count: u32,
+    content_stencil: &wgpu::StencilState,
 ) -> (wgpu::RenderPipeline, wgpu::RenderPipeline) {
     let shader = device.create_shader_module(wgpu::ShaderModuleDescriptor {
         label: Some("text.wgsl"),
@@ -298,7 +299,7 @@ pub fn create_pipelines(
                 format: wgpu::TextureFormat::Depth24PlusStencil8,
                 depth_write_enabled,
                 depth_compare,
-                stencil: wgpu::StencilState::default(),
+                stencil: content_stencil.clone(),
                 bias: wgpu::DepthBiasState::default(),
             }),
             multisample: wgpu::MultisampleState {