Add link editing, AI re-description, and footer

Links can now be edited manually (title, summary, category,
manufacturer, tags) via an inline edit form, with a "KI neu
beschreiben lassen" action that re-fetches the URL and lets the AI
regenerate all fields. Editing recomputes the search embedding.

Also adds an app footer showing author, version, and hostname.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/main.py

@@ -19,6 +19,11 @@ app = FastAPI(title="LinkVault")
 app.add_middleware(SessionMiddleware, secret_key=config.SECRET_KEY, max_age=60 * 60 * 24 * 14)
 
 templates = Jinja2Templates(directory=str(Path(__file__).parent / "templates"))
+templates.env.globals.update(
+    app_author=config.APP_AUTHOR,
+    app_version=config.APP_VERSION,
+    app_host=config.APP_HOST,
+)
 
 
 # ---------------------------------------------------------------------------
@@ -281,3 +286,130 @@ def delete_link(
         db.delete(link)
         db.commit()
     return Response(status_code=200)
+
+
+def _get_owned_link(db: Session, user: User, link_id: int) -> Link | None:
+    link = db.get(Link, link_id)
+    if link and link.user_id == user.id:
+        return link
+    return None
+
+
+def _parse_tags(raw: str) -> list[str]:
+    return [t.strip() for t in raw.split(",") if t.strip()][:8]
+
+
+@app.get("/links/{link_id}/edit", response_class=HTMLResponse)
+def edit_link_form(
+    link_id: int,
+    request: Request,
+    db: Session = Depends(get_db),
+):
+    user = current_user(request, db)
+    if not user:
+        return Response(status_code=401, headers={"HX-Redirect": "/login"})
+    link = _get_owned_link(db, user, link_id)
+    if not link:
+        return Response(status_code=404)
+    return templates.TemplateResponse(
+        "_link_card_edit.html",
+        {"request": request, "link": link, "ai_enabled": config.AI_ENABLED},
+    )
+
+
+@app.get("/links/{link_id}/view", response_class=HTMLResponse)
+def view_link_card(
+    link_id: int,
+    request: Request,
+    db: Session = Depends(get_db),
+):
+    user = current_user(request, db)
+    if not user:
+        return Response(status_code=401, headers={"HX-Redirect": "/login"})
+    link = _get_owned_link(db, user, link_id)
+    if not link:
+        return Response(status_code=404)
+    return templates.TemplateResponse(
+        "_link_card.html", {"request": request, "link": link}
+    )
+
+
+@app.put("/links/{link_id}", response_class=HTMLResponse)
+def update_link(
+    link_id: int,
+    request: Request,
+    title: str = Form(""),
+    summary: str = Form(""),
+    category: str = Form(""),
+    manufacturer: str = Form(""),
+    tags: str = Form(""),
+    db: Session = Depends(get_db),
+):
+    user = current_user(request, db)
+    if not user:
+        return Response(status_code=401, headers={"HX-Redirect": "/login"})
+    link = _get_owned_link(db, user, link_id)
+    if not link:
+        return Response(status_code=404)
+
+    link.title = title.strip()[:300] or link.url
+    link.summary = summary.strip()[:1000]
+    link.category = category.strip()[:120]
+    link.manufacturer = manufacturer.strip()[:120]
+    link.tags = json.dumps(_parse_tags(tags), ensure_ascii=False)
+
+    embed_source = " ".join([link.title, link.summary, tags])
+    embedding = ai.embed(embed_source)
+    if embedding:
+        link.embedding = json.dumps(embedding)
+
+    db.commit()
+    db.refresh(link)
+    return templates.TemplateResponse(
+        "_link_card.html", {"request": request, "link": link}
+    )
+
+
+@app.post("/links/{link_id}/reanalyze", response_class=HTMLResponse)
+def reanalyze_link(
+    link_id: int,
+    request: Request,
+    db: Session = Depends(get_db),
+):
+    user = current_user(request, db)
+    if not user:
+        return Response(status_code=401, headers={"HX-Redirect": "/login"})
+    link = _get_owned_link(db, user, link_id)
+    if not link:
+        return Response(status_code=404)
+
+    title, text = scraper.fetch(link.url)
+    existing = facets(db, user)
+    meta = ai.categorize(
+        link.url,
+        title,
+        text,
+        [name for name, _ in existing["categories"] if name != link.category],
+        [name for name, _ in existing["manufacturers"] if name != link.manufacturer],
+    )
+
+    embed_source = " ".join(
+        [meta["title"], meta["summary"], " ".join(meta["tags"]), text[:1000]]
+    )
+    embedding = ai.embed(embed_source)
+
+    link.title = meta["title"]
+    link.summary = meta["summary"]
+    link.category = meta["category"]
+    link.manufacturer = meta["manufacturer"]
+    link.tags = json.dumps(meta["tags"], ensure_ascii=False)
+    if embedding:
+        link.embedding = json.dumps(embedding)
+    link.status = "ok" if text else "no_content"
+
+    db.commit()
+    db.refresh(link)
+    return templates.TemplateResponse(
+        "_link_card_edit.html",
+        {"request": request, "link": link, "ai_enabled": config.AI_ENABLED},
+    )