add a share_target for people to add a photo

src/db/tables/temp.ts

@@ -0,0 +1,13 @@
+// for ephemeral uses, eg. passing a blob from the service worker to the main thread
+
+export type Temp = {
+  id: string;
+  blob?: Blob;
+};
+
+/**
+ * Schema for the Temp table in the database.
+ */
+export const TempSchema = {
+  temp: "id",
+};