chore(branding): point firmware at wevisto.com

Flip APP_BASE_URL and the on-screen "go to <domain>/setup/..." text in
the rendered setup_bg images from pictureframe.edholm.me to wevisto.com.
Per the dual-domain migration plan (Option C — server keeps both alive
indefinitely), this only affects newly-flashed units; field devices on
the old URL keep working against the same backend.

Regenerated both panels' setup_bg.bin via gen_screens*.py so the
embedded URL in the on-screen QR overlay text matches the firmware's
runtime poll URL.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/gen_screens_13e6.py

@@ -21,7 +21,7 @@ from PIL import Image, ImageDraw, ImageFont
 import qrcode
 import os, sys
 
-MANUAL_URL = "https://pictureframe.edholm.me/help"
+MANUAL_URL = "https://wevisto.com/help"
 
 W, H = 1200, 1600
 
@@ -388,7 +388,7 @@ def gen_setup():
                     underline_x + text_w, underline_y + 6], fill=GR)
 
     text_center(draw, W // 2, BODY_Y + 170, "Scan the QR to link this frame",      F_STEP_B, BK)
-    text_center(draw, W // 2, BODY_Y + 210, "to your pictureframe.edholm.me account.", F_STEP, BK)
+    text_center(draw, W // 2, BODY_Y + 210, "to your wevisto.com account.", F_STEP, BK)
 
     # Setup QR with decorative border + green/black double frame
     draw_qr_frame(draw, SETUP_QR_X, SETUP_QR_Y, SETUP_QR_PX, GR)