feat(landing): pagini publice Termeni/GDPR/Documentatie API + fix link-uri moarte

Antet/footer/stil extrase in include-uri comune (_lp_*.html) folosite de
landing si de shell-ul paginilor statice (landing_static.html). Butoanele
'Vezi cum functioneaza' si 'Vezi documentatia API' devin link-uri reale;
footer-ul si consimtamantul de la inregistrare leaga paginile noi;
Contact indica spre romfast.ro/menu/contact.html.

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

app/web/routes.py

@@ -837,6 +837,32 @@ def dashboard(request: Request, tab: str = "acasa", status: str | None = None, s
         conn.close()
 
 
+# Pagini statice publice cu antet/footer comune cu landing-ul.
+_PAGINI_STATICE = {
+    "termeni": "termeni.html",
+    "confidentialitate": "confidentialitate.html",
+}
+
+
+@router.get("/termeni", response_class=HTMLResponse)
+@router.get("/confidentialitate", response_class=HTMLResponse)
+def pagina_statica(request: Request) -> HTMLResponse:
+    nume = request.url.path.strip("/")
+    return templates.TemplateResponse(_PAGINI_STATICE[nume], {"request": request})
+
+
+@router.get("/documentatie-api", response_class=HTMLResponse)
+def pagina_documentatie_api(request: Request) -> HTMLResponse:
+    """Documentatie API publica (varianta scurta a tab-ului Integrare, fara login)."""
+    from .integrare_examples import exemplu_json
+
+    return templates.TemplateResponse("documentatie_api.html", {
+        "request": request,
+        "base_url": str(request.base_url).rstrip("/"),
+        "exemplu_json": exemplu_json(),
+    })
+
+
 @router.get("/_fragments/acasa", response_class=HTMLResponse)
 def fragment_acasa(request: Request) -> HTMLResponse:
     """Fragment HTMX pentru tab-ul Acasa."""