fix: crash on startup

```
wgpu error: Validation Error

Caused by:
  In Device::create_texture, label = 'egui_texid_Managed(65)'
    Dimension X value 10986 exceeds the limit of 8192
```

Signed-off-by: kernelkind <kernelkind@gmail.com>

crates/notedeck/src/media/blur.rs

@@ -23,6 +23,19 @@ impl PixelDimensions {
             y: (self.y as f32) / ppp,
         }
     }
+
+    pub fn clamp_wgpu(mut self) -> PixelDimensions {
+        let val = super::MAX_SIZE_WGPU as u32;
+        if self.x > val {
+            self.x = val;
+        }
+
+        if self.y > val {
+            self.y = val
+        }
+
+        self
+    }
 }
 
 #[derive(Clone, Debug)]
@@ -50,7 +63,7 @@ impl ImageMetadata {
         ui: &egui::Ui,
         available_points: PointDimensions,
     ) -> PixelDimensions {
-        let max_pixels = available_points.to_pixels(ui);
+        let max_pixels = available_points.to_pixels(ui).clamp_wgpu();
 
         let Some(defined_dimensions) = &self.dimensions else {
             return max_pixels;

crates/notedeck/src/media/mod.rs

@@ -30,3 +30,6 @@ impl AnimationMode {
         !matches!(self, Self::NoAnimation)
     }
 }
+
+// max size wgpu can handle without panicing
+pub const MAX_SIZE_WGPU: usize = 8192;