[i18n] Add missing English keys from main branch

Add missing English translation keys that were added in recent
releases (PR #6256, #6112, #6187) but not backported to rh-test:

- Media asset management (delete, selection, job ID toast)
- Asset browser aria labels
- Sidebar labels (console, menu, assets, imported, generated)
- File management strings (no files found messages)
- Resize handle tooltips
- Basic UI strings (edit/delete image, chart, file, etc.)

These will be translated in the next commit.

src/locales/en/main.json

@@ -9,8 +9,19 @@
     "downloadImage": "Download image",
     "downloadVideo": "Download video",
     "editOrMaskImage": "Edit or mask image",
+    "editImage": "Edit image",
+    "deleteImage": "Delete image", 
+    "deleteAudioFile": "Delete audio file",
     "removeImage": "Remove image",
     "removeVideo": "Remove video",
+    "chart": "Chart",
+    "chartLowercase": "chart",
+    "file": "file",
+    "selectedFile": "Selected file",
+    "none": "None",
+    "markdown": "markdown",
+    "content": "content",
+    "audioProgress": "Audio progress",
     "viewImageOfTotal": "View image {index} of {total}",
     "viewVideoOfTotal": "View video {index} of {total}",
     "imagePreview": "Image preview - Use arrow keys to navigate between images",
@@ -25,6 +36,8 @@
     "import": "Import",
     "loadAllFolders": "Load All Folders",
     "logoAlt": "ComfyUI Logo",
+    "comfyOrgLogoAlt": "ComfyOrg Logo",
+    "comfy": "Comfy",
     "refresh": "Refresh",
     "refreshNode": "Refresh Node",
     "terminal": "Terminal",
@@ -49,6 +62,10 @@
     "icon": "Icon",
     "color": "Color",
     "error": "Error",
+    "resizeFromBottomRight": "Resize from bottom-right corner",
+    "resizeFromTopRight": "Resize from top-right corner",
+    "resizeFromBottomLeft": "Resize from bottom-left corner",
+    "resizeFromTopLeft": "Resize from top-left corner",
     "info": "Node Info",
     "bookmark": "Save to Library",
     "moreOptions": "More Options",
@@ -581,13 +598,25 @@
     "nodeLibrary": "Node Library",
     "workflows": "Workflows",
     "templates": "Templates",
+    "assets": "Assets",
+    "mediaAssets": "Media Assets",
+    "backToAssets": "Back to all assets",
     "labels": {
       "queue": "Queue",
       "nodes": "Nodes",
       "models": "Models",
       "workflows": "Workflows",
-      "templates": "Templates"
+      "templates": "Templates",
+      "console": "Console",
+      "menu": "Menu",
+      "assets": "Assets",
+      "imported": "Imported",
+      "generated": "Generated"
     },
+    "noFilesFound": "No files found",
+    "noImportedFiles": "No imported files found", 
+    "noGeneratedFiles": "No generated files found",
+    "noFilesFoundMessage": "Upload files or generate content to see them here",
     "browseTemplates": "Browse example templates",
     "openWorkflow": "Open workflow in local file system",
     "newBlankWorkflow": "Create a new blank workflow",
@@ -2196,7 +2225,36 @@
     "sortAZ": "A-Z",
     "sortZA": "Z-A",
     "sortRecent": "Recent",
-    "sortPopular": "Popular"
+    "sortPopular": "Popular",
+    "ariaLabel": {
+      "assetCard": "{name} - {type} asset",
+      "loadingAsset": "Loading asset"
+    }
+  },
+  "mediaAsset": {
+    "deleteAssetTitle": "Delete this asset?",
+    "deleteAssetDescription": "This asset will be permanently removed.",
+    "deleteSelectedTitle": "Delete selected assets?",
+    "deleteSelectedDescription": "{count} asset(s) will be permanently removed.",
+    "assetDeletedSuccessfully": "Asset deleted successfully",
+    "deletingImportedFilesCloudOnly": "Deleting imported files is only supported in cloud version",
+    "failedToDeleteAsset": "Failed to delete asset",
+    "jobIdToast": {
+      "jobIdCopied": "Job ID copied to clipboard",
+      "jobIdCopyFailed": "Failed to copy Job ID",
+      "copied": "Copied",
+      "error": "Error"
+    },
+    "selection": {
+      "selectedCount": "Assets Selected: {count}",
+      "deselectAll": "Deselect all",
+      "downloadSelected": "Download",
+      "deleteSelected": "Delete",
+      "downloadStarted": "Downloading {count} files...",
+      "downloadsStarted": "Started downloading {count} file(s)",
+      "assetsDeletedSuccessfully": "{count} asset(s) deleted successfully",
+      "failedToDeleteAssets": "Failed to delete selected assets"
+    }
   },
   "desktopDialogs": {
     "": {