refactor: change model button terminology from Upload to Import (#6800)

## Summary
Changes user-facing text from "Upload" to "Import" for the model import
feature, as "Import" better describes importing models from external
sources like Civitai.

## Changes
- Updated button icon from `upload` to `package-plus`
- Changed all user-facing text in English locale from "Upload" to
"Import"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6800-refactor-change-model-button-terminology-from-Upload-to-Import-2b26d73d365081059ce6e4a548f943ce)
by [Unito](https://www.unito.io)

Co-authored-by: Claude <noreply@anthropic.com>

Author: luke-mino-altherr

src/locales/en/main.json

@@ -2076,8 +2076,8 @@
     "failedToCreateNode": "Failed to create node. Please try again or check console for details.",
     "noModelsInFolder": "No {type} available in this folder",
     "searchAssetsPlaceholder": "Type to search...",
-    "uploadModel": "Upload model",
-    "uploadModelFromCivitai": "Upload a model from Civitai",
+    "uploadModel": "Import model",
+    "uploadModelFromCivitai": "Import a model from Civitai",
     "uploadModelFailedToRetrieveMetadata": "Failed to retrieve metadata. Please check the link and try again.",
     "onlyCivitaiUrlsSupported": "Only Civitai URLs are supported",
     "uploadModelDescription1": "Paste a Civitai model download link to add it to your library.",
@@ -2094,16 +2094,16 @@
     "tags": "Tags",
     "tagsPlaceholder": "e.g., models, checkpoint",
     "tagsHelp": "Separate tags with commas",
-    "upload": "Upload",
-    "uploadingModel": "Uploading model...",
-    "uploadSuccess": "Model uploaded successfully!",
-    "uploadFailed": "Upload failed",
+    "upload": "Import",
+    "uploadingModel": "Importing model...",
+    "uploadSuccess": "Model imported successfully!",
+    "uploadFailed": "Import failed",
     "modelAssociatedWithLink": "The model associated with the link you provided:",
     "modelTypeSelectorLabel": "What type of model is this?",
     "modelTypeSelectorPlaceholder": "Select model type",
     "selectModelType": "Select model type",
     "notSureLeaveAsIs": "Not sure? Just leave this as is",
-    "modelUploaded": "Model uploaded! 🎉",
+    "modelUploaded": "Model imported! 🎉",
     "findInLibrary": "Find it in the {type} section of the models library.",
     "finish": "Finish",
     "allModels": "All Models",
@@ -2123,7 +2123,7 @@
     "errorUnsafeVirusScan": "CivitAI detected malware or suspicious content in this file",
     "errorModelTypeNotSupported": "This model type is not supported",
     "errorUnknown": "An unexpected error occurred",
-    "errorUploadFailed": "Failed to upload asset. Please try again.",
+    "errorUploadFailed": "Failed to import asset. Please try again.",
     "ariaLabel": {
       "assetCard": "{name} - {type} asset",
       "loadingAsset": "Loading asset"

src/platform/assets/components/AssetBrowserModal.vue

@@ -38,7 +38,7 @@
           :on-click="handleUploadClick"
         >
           <template #icon>
-            <i class="icon-[lucide--upload]" />
+            <i class="icon-[lucide--package-plus]" />
           </template>
         </IconTextButton>
       </div>