Add four Steins;Gate pages; shuffle the page rotation hourly

Divergence meter (Nixie tubes, world lines and clock), a D-mail sent
through the Phone Microwave using the panel's Message text, the Future
Gadget Lab inventory with live sensors, and a world line chart of today's
solar power. Original pixel art in tools/steins_sprites.py; the sprite
tool is shared between themes and Sprite, sprite(), polar() and arc()
move to el512_pages.h. HomeData gains the message and a 24 h solar
history in 15-minute slots.

The rotation now walks all pages in a random order that is reshuffled
every hour (Still Alive stays out, Now playing is skipped when idle).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/konosuba_sprites.py

@@ -285,44 +285,39 @@ SPRITES["MEGUMIN_BLINK"] = list(SPRITES["MEGUMIN"])
 SPRITES["MEGUMIN_BLINK"][17] = SPRITES["MEGUMIN"][17][:8] + ".." + SPRITES["MEGUMIN"][17][10:]
 
 
-def write_header(path):
+def write_header(path, sprites=SPRITES, title="KonoSuba", tool="konosuba_sprites.py", namespace="konosuba"):
     out = [
-        "// Pixel art for the KonoSuba pages, generated by tools/konosuba_sprites.py;",
+        f"// Pixel art for the {title} pages, generated by tools/{tool};",
         "// edit the art there. Original 1-bit fan art, '#' = lit pixel.",
         "#pragma once",
         "",
-        "#include <stdint.h>",
+        '#include "el512_pages.h"  // Sprite',
         "",
-        "namespace esphome::el512::konosuba {",
-        "",
-        "struct Sprite {",
-        "  uint8_t w, h;",
-        "  const char *const *rows;",
-        "};",
+        f"namespace esphome::el512::{namespace} {{",
         "",
     ]
-    for name, rows in SPRITES.items():
+    for name, rows in sprites.items():
         out.append(f"static const char *const {name}_ROWS[] = {{")
         out += [f'    "{r}",' for r in rows]
         out.append("};")
         out.append(f"static constexpr Sprite {name}{{{len(rows[0])}, {len(rows)}, {name}_ROWS}};")
         out.append("")
-    out.append("}  // namespace esphome::el512::konosuba")
+    out.append(f"}}  // namespace esphome::el512::{namespace}")
     path.write_text("\n".join(out) + "\n", encoding="utf-8")
 
 
-def write_preview(path, scale=6):
+def write_preview(path, sprites=SPRITES, scale=6):
     from PIL import Image, ImageDraw
 
     pad = 4
-    names = list(SPRITES)
-    width = sum(len(SPRITES[n][0]) + pad for n in names) * scale
-    height = (max(len(r) for r in SPRITES.values()) + pad) * scale + 14
+    names = list(sprites)
+    width = sum(len(sprites[n][0]) + pad for n in names) * scale
+    height = (max(len(r) for r in sprites.values()) + pad) * scale + 14
     img = Image.new("RGB", (width, height), (20, 12, 0))
     draw = ImageDraw.Draw(img)
     x = 0
     for name in names:
-        rows = SPRITES[name]
+        rows = sprites[name]
         draw.text((x + 2, 2), name, fill=(120, 80, 0))
         for y, row in enumerate(rows):
             for cx, ch in enumerate(row):
@@ -333,16 +328,17 @@ def write_preview(path, scale=6):
     img.save(path)
 
 
-def main():
+def main(sprites=SPRITES, title="KonoSuba", tool="konosuba_sprites.py", namespace="konosuba", doc=__doc__):
+    """Command line for a sprite file: writes the header, optionally a preview."""
     root = Path(__file__).resolve().parent.parent
-    ap = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)
-    ap.add_argument("--out", type=Path, default=root / "components/el512/konosuba_sprites.h")
+    ap = argparse.ArgumentParser(description=doc, formatter_class=argparse.RawDescriptionHelpFormatter)
+    ap.add_argument("--out", type=Path, default=root / f"components/el512/{namespace}_sprites.h")
     ap.add_argument("--preview", type=Path, help="also write a magnified PNG of all sprites")
     args = ap.parse_args()
-    write_header(args.out)
+    write_header(args.out, sprites, title, tool, namespace)
     print(f"wrote {args.out}")
     if args.preview:
-        write_preview(args.preview)
+        write_preview(args.preview, sprites)
         print(f"wrote {args.preview}")