feat: Archiv-Backfill, responsive Bilder und Site-Meta

Ergänzt Backfill- und Hilfsskripte, erzeugt nach der Pixazo-Generierung
komprimierte srcset-Varianten, validiert leere Bilder und fügt Favicon,
Web Manifest sowie Open-Graph-/Twitter-Tags in die Templates ein.

Co-authored-by: Cursor <cursoragent@cursor.com>

generator/patch_head_meta.py

@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+"""Inject favicon and social meta tags into existing static HTML pages."""
+
+from __future__ import annotations
+
+import json
+import os
+import re
+import sys
+from pathlib import Path
+
+from generate import build_archiv_entries, log, render_template, write_text_atomic
+
+
+def extract_meta(html: str, prop: str) -> str | None:
+    match = re.search(rf'property="{re.escape(prop)}" content="([^"]*)"', html)
+    return match.group(1) if match else None
+
+
+def extract_name_meta(html: str, name: str) -> str | None:
+    match = re.search(rf'name="{re.escape(name)}" content="([^"]*)"', html)
+    return match.group(1) if match else None
+
+
+def extract_hero_image(html: str) -> str | None:
+    match = re.search(r'<img src="/img/(\d{4}-\d{2}-\d{2})(?:-\d+w)?\.jpg"', html)
+    return f"/img/{match.group(1)}.jpg" if match else None
+
+
+def render_head_block(
+    *,
+    site_url: str,
+    canonical_path: str,
+    og_title: str,
+    og_description: str,
+    og_image: str | None,
+) -> str:
+    return render_template(
+        "_head_common.html.j2",
+        {
+            "site_url": site_url,
+            "canonical_path": canonical_path,
+            "og_title": og_title,
+            "og_description": og_description,
+            "og_image": og_image,
+        },
+    ).rstrip()
+
+
+def inject_head_block(html: str, block: str) -> str:
+    if 'rel="icon"' in html:
+        return html
+    marker = '<meta property="og:description"'
+    idx = html.find(marker)
+    if idx == -1:
+        marker = '<meta name="description"'
+        idx = html.find(marker)
+    if idx == -1:
+        raise ValueError("could not find description meta tag")
+    line_end = html.find("\n", idx)
+    if line_end == -1:
+        raise ValueError("unexpected HTML structure")
+    return html[: line_end + 1] + block + "\n" + html[line_end + 1 :]
+
+
+def patch_startup_page(path: Path, canonical_path: str, site_url: str) -> bool:
+    html = path.read_text(encoding="utf-8")
+    og_title = extract_meta(html, "og:title") or extract_name_meta(html, "twitter:title")
+    og_description = extract_meta(html, "og:description") or extract_name_meta(html, "description")
+    if not og_title or not og_description:
+        log(f"warning: skipping {path}, missing title/description")
+        return False
+    block = render_head_block(
+        site_url=site_url,
+        canonical_path=canonical_path,
+        og_title=og_title,
+        og_description=og_description,
+        og_image=extract_hero_image(html),
+    )
+    updated = inject_head_block(html, block)
+    if updated != html:
+        write_text_atomic(path, updated)
+        log(f"patched {path}")
+        return True
+    return False
+
+
+def patch_archiv_index(path: Path, site_url: str, og_image: str) -> bool:
+    html = path.read_text(encoding="utf-8")
+    og_title = "MOBEA Archiv – Unsere bisherigen Pivots"
+    og_description = "Jeden Tag ein neues Startup. Hier ruhen die bisherigen."
+    if 'property="og:title"' not in html:
+        html = html.replace(
+            '<meta name="description" content="Jeden Tag ein neues Startup. Hier ruhen die bisherigen.">',
+            '<meta name="description" content="Jeden Tag ein neues Startup. Hier ruhen die bisherigen.">\n'
+            f'  <meta property="og:title" content="{og_title}">\n'
+            f'  <meta property="og:description" content="{og_description}">',
+            1,
+        )
+    block = render_head_block(
+        site_url=site_url,
+        canonical_path="/archiv/",
+        og_title=og_title,
+        og_description=og_description,
+        og_image=og_image,
+    )
+    updated = inject_head_block(html, block)
+    if updated != html:
+        write_text_atomic(path, updated)
+        log(f"patched {path}")
+        return True
+    return False
+
+
+def main() -> int:
+    repo_root = Path(__file__).resolve().parent.parent
+    site_dir = Path(os.environ.get("SITE_DIR", repo_root / "public"))
+    data_dir = Path(os.environ.get("DATA_DIR", repo_root / "data"))
+    site_url = os.environ.get("SITE_URL", "https://mobea.de")
+
+    archive = json.loads((data_dir / "archive.json").read_text(encoding="utf-8"))
+    latest_image = next(
+        (
+            f"/img/{entry['date']}.jpg"
+            for entry in sorted(archive, key=lambda e: e["date"], reverse=True)
+            if entry.get("has_image")
+        ),
+        "/og-default.jpg",
+    )
+
+    patched = 0
+    index_path = site_dir / "index.html"
+    if index_path.exists():
+        patched += patch_startup_page(index_path, "/", site_url)
+
+    archiv_dir = site_dir / "archiv"
+    for path in sorted(archiv_dir.glob("2026-*.html")):
+        patched += patch_startup_page(path, f"/archiv/{path.name}", site_url)
+
+    archiv_index = archiv_dir / "index.html"
+    if archiv_index.exists():
+        patched += patch_archiv_index(archiv_index, site_url, latest_image)
+
+    log(f"done, patched {patched} file(s)")
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())