feat(import): bulk tool import (CSV/JSON/YAML) for admins; NetBox-style help button

- Add POST /admin/tools/import with format auto-detect, CSV delimiters
  (comma/semicolon/tab), per-row validation via CreateToolBody, bulk insert,
  audit log entries per imported tool; gated by new 'tool-import' feature
  flag (premium/enterprise; admins always pass)
- Add tool-import-dialog UI (format tabs, delimiter select, textarea, file
  upload, result/error list) behind hasFeature('tool-import')
- Replace FieldHelp question marks and bare GuideHelp links with a NetBox-style
  'Hilfe/Help' outline button (HelpCircle + text) in form headers only
- Sync locales to 482 keys per language (de/en), update handbook docs
  (administration import section, index/plaene feature tables), regenerate
  API client + zod schemas, add yaml dependency

artifacts/toolrate/src/pages/home.tsx

@@ -7,7 +7,6 @@ import {
 import { Card, CardHeader, CardTitle, CardDescription, CardContent } from "@/components/ui/card";
 import { Skeleton } from "@/components/ui/skeleton";
 import { Layout } from "@/components/layout";
-import { GuideHelp } from "@/components/guide-help";
 import { ToolCard } from "@/components/tool-card";
 import { Star, Wrench, MessageSquare, ArrowRight, Plus } from "lucide-react";
 import { Link } from "wouter";
@@ -25,9 +24,8 @@ export default function Home() {
       <div className="space-y-8 pb-8">
         <div className="flex flex-col sm:flex-row justify-between items-start sm:items-end gap-4">
           <div>
-            <h1 className="text-3xl font-bold tracking-tight mb-2 flex items-center gap-2">
+            <h1 className="text-3xl font-bold tracking-tight mb-2">
               {t("home.welcome")}
-              <GuideHelp guide="getting-started" label={t("home.welcome")} />
             </h1>
             <p className="text-muted-foreground">{t("home.tagline")}</p>
           </div>