Fix images missing during desktop install (#5941)

## Summary

There's missing desktop GPU picker images caused by refactoring of
desktop front-end installation code. Was previously not an issue because
the paths were automatically adjusted by Vue, vite, or some other
tooling. Now that these are set programmatically (component props), this
"helpful" path adjustment is no longer occurring.

## Changes

- **What**: Takes away leading `/` from image paths.

## Screenshots (if applicable)

Current:
<img width="480" height="307" alt="image"
src="https://github.com/user-attachments/assets/20c0dd29-26d1-41b8-a59d-d3b0e69d998a"
/>

Proposed:
<img width="480" height="299" alt="image"
src="https://github.com/user-attachments/assets/aee87d1f-2060-4ec7-a8fc-43ebe2d650c2"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5941-Fix-images-missing-during-desktop-install-2846d73d365081c7b318c0ff31f70f2f)
by [Unito](https://www.unito.io)

src/components/install/GpuPicker.vue

@@ -11,7 +11,7 @@
       <!-- Apple Metal / NVIDIA -->
       <HardwareOption
         v-if="platform === 'darwin'"
-        :image-path="'/assets/images/apple-mps-logo.png'"
+        :image-path="'assets/images/apple-mps-logo.png'"
         placeholder-text="Apple Metal"
         subtitle="Apple Metal"
         :value="'mps'"
@@ -21,7 +21,7 @@
       />
       <HardwareOption
         v-else
-        :image-path="'/assets/images/nvidia-logo-square.jpg'"
+        :image-path="'assets/images/nvidia-logo-square.jpg'"
         placeholder-text="NVIDIA"
         :subtitle="$t('install.gpuPicker.nvidiaSubtitle')"
         :value="'nvidia'"