feat(brand): AP SSID WeVisto-XXXX + logo placeholder + 4-step copy

Rename the AP broadcast SSID from PictureFrame-XXXX to WeVisto-XXXX
(operation.h:ap_ssid_from_mac + main.cpp:enter_provisioning). Tests
updated to match.

Setup screens (both panels):
- Top-right header chip replaced with a draw_logo_placeholder() box —
  a 'WeVisto' text mark with a 'PLACEHOLDER' subtitle. When the real
  brand asset lands, swap the function for a paste of the file at the
  same coordinates; no layout change needed.
- Step list rewritten to Matt's spec (4 steps, not 5):
    1. Turn on your WeVisto
    2. Unlock your phone
    3. Scan QR 1  — This will connect your phone to the WeVisto
    4. Scan QR 2  — This will open the WeVisto setup page
  Step 5 (type WiFi password) lived only in the on-panel guide; the
  user does that on the phone via the captive portal, where the
  prompt is already explicit.
- Regenerated both panels' setup_bg / ap_bg / ap_bg_retry assets via
  the gen_screens scripts.

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

scripts/gen_screens_13e6.py

@@ -120,17 +120,42 @@ def draw_qr_frame(draw, qx, qy, qp, accent):
     draw.rectangle([qx - 4,  qy - 4,  qx + qp + 3,  qy + qp + 3],  outline=BK,     width=4)
 
 
-def draw_header(draw, accent, header_text, ssid_text):
-    """Yellow/red band along the top with a section title + SSID chip."""
+def draw_header(draw, accent, header_text):
+    """Coloured band along the top with section title on the left. Logo
+    placeholder is rendered separately by draw_logo_placeholder() so the
+    brand mark sits in the top right of every setup screen."""
     draw.rectangle([0, 0, W - 1, HEADER_H - 1], fill=accent)
     draw.text((LEFT_PAD, 40), header_text, font=F_BAR, fill=BK)
 
-    if ssid_text:
-        bb = draw.textbbox((0, 0), ssid_text, font=F_CHIP)
-        chip_w = bb[2] - bb[0] + 36
-        chip_x = W - chip_w - LEFT_PAD
-        draw.rectangle([chip_x, 25, chip_x + chip_w, HEADER_H - 25], fill=BK)
-        draw.text((chip_x + 18, 38), ssid_text, font=F_CHIP, fill=accent)
+
+# ── Logo placeholder ─────────────────────────────────────────────────────────
+# Box dimensions for the top-right placeholder. When the real brand mark
+# lands, replace draw_logo_placeholder() with a paste of assets/logo.png
+# (or similar) at these same coordinates so the layout stays stable.
+LOGO_W   = 300
+LOGO_H   = 92
+LOGO_X   = W - LOGO_W - LEFT_PAD       # 864
+LOGO_Y   = (HEADER_H - LOGO_H) // 2    # 19
+
+def draw_logo_placeholder(img):
+    """White rounded-look box with 'WeVisto' brand text in the top right of
+    the header. Stand-in for the real logo — same position will be reused."""
+    draw = ImageDraw.Draw(img)
+    draw.rectangle([LOGO_X, LOGO_Y, LOGO_X + LOGO_W - 1, LOGO_Y + LOGO_H - 1], fill=WH)
+    draw.rectangle([LOGO_X, LOGO_Y, LOGO_X + LOGO_W - 1, LOGO_Y + LOGO_H - 1],
+                   outline=BK, width=4)
+
+    f_logo = ttf("DejaVuSans-Bold.ttf", 44)
+    bb = draw.textbbox((0, 0), "WeVisto", font=f_logo)
+    tw = bb[2] - bb[0]
+    draw.text((LOGO_X + (LOGO_W - tw) // 2, LOGO_Y + 12), "WeVisto",
+              font=f_logo, fill=BK)
+
+    f_hint = ttf("DejaVuSans-Bold.ttf", 14)
+    bb = draw.textbbox((0, 0), "PLACEHOLDER", font=f_hint)
+    pw = bb[2] - bb[0]
+    draw.text((LOGO_X + (LOGO_W - pw) // 2, LOGO_Y + LOGO_H - 22),
+              "PLACEHOLDER", font=f_hint, fill=BK)
 
 
 def draw_divider(draw):
@@ -256,10 +281,8 @@ def gen_ap(accent=YL,
     img = Image.new("RGB", (W, H), WH)
     draw = ImageDraw.Draw(img)
 
-    # Universal brand chip — firmware doesn't write text into static .bin
-    # assets, so leaving a per-device SSID placeholder here would lie on
-    # every other unit. Same image for every frame.
-    draw_header(draw, accent, header_text, "PICTUREFRAME")
+    draw_header(draw, accent, header_text)
+    draw_logo_placeholder(img)
     draw_divider(draw)
 
     # ── LEFT COLUMN ──────────────────────────────────────────────────────────
@@ -275,11 +298,10 @@ def gen_ap(accent=YL,
     # 5 numbered steps — same instructions as the 7.3" but with the larger
     # type that fits comfortably on a 13.3" portrait body.
     steps = [
-        ("Plug in the frame",          ""),
-        ("Unlock your phone",          ""),
-        ("Scan QR 1",                  "joins your phone to PictureFrame"),
-        ("Scan QR 2",                  "opens the setup page"),
-        ("Type your home WiFi",        "password and tap Connect"),
+        ("Turn on your WeVisto", ""),
+        ("Unlock your phone",    ""),
+        ("Scan QR 1",            "This will connect your phone to the WeVisto"),
+        ("Scan QR 2",            "This will open the WeVisto setup page"),
     ]
     step_y0    = head_y + 240
     step_pitch = 92
@@ -375,7 +397,8 @@ def gen_setup():
     img = Image.new("RGB", (W, H), WH)
     draw = ImageDraw.Draw(img)
 
-    draw_header(draw, GR, "WIFI CONNECTED  —  STEP 2 OF 2", "192.168.x.x")
+    draw_header(draw, GR, "WIFI CONNECTED  —  STEP 2 OF 2")
+    draw_logo_placeholder(img)
 
     # Centered heading
     text_center(draw, W // 2, BODY_Y + 30,  "Almost ready",                        F_HEAD,  BK)