feat: add Supabase avatar migration query and mutation

Add findUsersWithSupabaseAvatars query and patchUserAvatar mutation
to support migrating avatar URLs from Supabase to Cloudinary.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: prazgaitis

packages/backend/_generated/api.d.ts

@@ -18,6 +18,7 @@ import type * as actions_clear from "../actions/clear.js";
 import type * as actions_createChallengeFromConfig from "../actions/createChallengeFromConfig.js";
 import type * as actions_fix2025ActivityTypes from "../actions/fix2025ActivityTypes.js";
 import type * as actions_fixContributesToStreak from "../actions/fixContributesToStreak.js";
+import type * as actions_migrateSupabaseAvatars from "../actions/migrateSupabaseAvatars.js";
 import type * as actions_payments from "../actions/payments.js";
 import type * as actions_rescoreStravaActivities from "../actions/rescoreStravaActivities.js";
 import type * as actions_seed from "../actions/seed.js";
@@ -159,6 +160,7 @@ declare const fullApi: ApiFromModules<{
   "actions/createChallengeFromConfig": typeof actions_createChallengeFromConfig;
   "actions/fix2025ActivityTypes": typeof actions_fix2025ActivityTypes;
   "actions/fixContributesToStreak": typeof actions_fixContributesToStreak;
+  "actions/migrateSupabaseAvatars": typeof actions_migrateSupabaseAvatars;
   "actions/payments": typeof actions_payments;
   "actions/rescoreStravaActivities": typeof actions_rescoreStravaActivities;
   "actions/seed": typeof actions_seed;

packages/backend/mutations/backfillCloudinary.ts

@@ -1,6 +1,19 @@
 import { internalMutation } from "../_generated/server";
 import { v } from "convex/values";
 
+/**
+ * Update a user's avatarUrl after migrating from Supabase to Cloudinary.
+ */
+export const patchUserAvatar = internalMutation({
+  args: {
+    userId: v.id("users"),
+    avatarUrl: v.string(),
+  },
+  handler: async (ctx, args) => {
+    await ctx.db.patch(args.userId, { avatarUrl: args.avatarUrl });
+  },
+});
+
 /**
  * Patch an activity with cloudinaryPublicIds after backfill upload.
  */

packages/backend/queries/backfillCloudinary.ts

@@ -1,6 +1,23 @@
 import { internalQuery } from "../_generated/server";
 import { v } from "convex/values";
 
+/**
+ * Find users whose avatarUrl points to Supabase storage.
+ */
+export const findUsersWithSupabaseAvatars = internalQuery({
+  args: {},
+  handler: async (ctx) => {
+    const users = await ctx.db.query("users").collect();
+    return users
+      .filter((u) => u.avatarUrl?.includes("supabase.co"))
+      .map((u) => ({
+        _id: u._id,
+        name: u.name,
+        avatarUrl: u.avatarUrl!,
+      }));
+  },
+});
+
 /**
  * Find activities that have Convex mediaIds but no cloudinaryPublicIds.
  * Used by the backfill action to process existing media.