fix(upscale): auto-orient images before upscaling and improve UI

Fix rotated output by calling autoOrient() before passing images to
the Python upscaler, correcting EXIF orientation metadata. Replace
2x/4x buttons with 2x-8x slider plus quick-select buttons (2x, 3x,
4x, 6x, 8x). Remove technical jargon about Real-ESRGAN/Lanczos from
the UI and progress bar.

apps/api/src/routes/tools/upscale.ts

@@ -3,6 +3,7 @@ import { writeFile } from "node:fs/promises";
 import { basename, join } from "node:path";
 import { upscale } from "@stirling-image/ai";
 import type { FastifyInstance, FastifyReply, FastifyRequest } from "fastify";
+import { autoOrient } from "../../lib/auto-orient.js";
 import { validateImageBuffer } from "../../lib/file-validation.js";
 import { createWorkspace } from "../../lib/workspace.js";
 import { updateSingleFileProgress } from "../progress.js";
@@ -54,6 +55,9 @@ export function registerUpscale(app: FastifyInstance) {
       const settings = settingsRaw ? JSON.parse(settingsRaw) : {};
       const scale = Number(settings.scale) || 2;
 
+      // Auto-orient to fix EXIF rotation before upscaling
+      fileBuffer = await autoOrient(fileBuffer);
+
       const jobId = randomUUID();
       const workspacePath = await createWorkspace(jobId);