chore(files): fix stale route TSDoc and hoist a regex literal (cleanup pass)

Post-review /cleanup: the dimensions route TSDoc still described backfill-once
behavior (now overwrite-on-mismatch via the content-key CAS); the bare-pixel
width regex is hoisted to module scope. No behavior change.

Author: waleedlatif1

apps/sim/app/api/workspaces/[id]/files/[fileId]/dimensions/route.ts

@@ -13,9 +13,10 @@ const logger = createLogger('WorkspaceFileDimensionsAPI')
 /**
  * PATCH /api/workspaces/[id]/files/[fileId]/dimensions
  *
- * Backfill an image file's intrinsic pixel dimensions — a pure rendering hint the editor uses to reserve
- * layout space before the image loads. Requires write permission and is idempotent (a no-op once the
- * dimensions are already stored), so the client can fire it once per image without coordination.
+ * Store an image file's intrinsic pixel dimensions — a pure rendering hint the editor uses to reserve
+ * layout space before the image loads. Requires write permission. The write commits whenever the row
+ * still holds the measured storage key, overwriting any stale value so a wrong size self-corrects; the
+ * client reports only on a real mismatch, so this is not storm-y despite not being a backfill-once no-op.
  */
 export const PATCH = withRouteHandler(
   async (request: NextRequest, context: { params: Promise<{ id: string; fileId: string }> }) => {

apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/image.tsx

@@ -10,6 +10,9 @@ import { useEditorEditable } from './use-editor-editable'
 
 const MIN_WIDTH = 64
 
+/** A bare pixel count (`"640"`) that needs a `px` suffix, vs. an already-unit'd width (`"50%"`). */
+const BARE_PIXEL_WIDTH = /^\d+$/
+
 /**
  * Drag-to-resize image node view (handle at the bottom-right, revealed on selection). Dragging
  * commits the new pixel width to the `width` attribute, which serializes to `<img width>`.
@@ -83,7 +86,7 @@ function ResizableImageView({ node, updateAttributes, selected, editor }: ReactN
   }
 
   const committedWidth = attrs.width
-    ? /^\d+$/.test(attrs.width)
+    ? BARE_PIXEL_WIDTH.test(attrs.width)
       ? `${attrs.width}px`
       : attrs.width
     : undefined