feat: add internal_component block type with contact form

InternalComponentBlock dispatches on `component` field value.
ContactFormComponent submits via /api/contact (SvelteKit proxy →
CMS /api/forms/kontakt/submit) with honeypot + client_age_ms.
BlockRenderer and block-types.ts updated accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/lib/block-types.ts

@@ -422,6 +422,17 @@ export type CalendarBlockData = Omit<
   layout?: BlockLayout;
 };
 
+/** Internal component block (_type: "internal_component"). */
+export type InternalComponentId = "form-contact";
+
+export interface InternalComponentBlockData {
+  _type?: "internal_component";
+  _slug?: string;
+  id?: string;
+  component?: InternalComponentId;
+  layout?: BlockLayout;
+}
+
 export interface WindMapBlockData {
   _type?: "wind_map";
   _slug?: string;

src/lib/components/BlockRenderer.svelte

@@ -16,6 +16,7 @@
   import CalendarBlock from "./blocks/CalendarBlock.svelte";
   import OrganisationsBlock from "./blocks/OrganisationsBlock.svelte";
   import OpnFormBlock from "./blocks/OpnFormBlock.svelte";
+  import InternalComponentBlock from "./blocks/InternalComponentBlock.svelte";
   import DeadlineBannerBlock from "./blocks/DeadlineBannerBlock.svelte";
   import StrommixBlock from "./blocks/StrommixBlock.svelte";
   import WindkarteBlock from "./blocks/WindkarteBlock.svelte";
@@ -39,6 +40,7 @@
     CalendarBlockData,
     OrganisationsBlockData,
     OpnFormBlockData,
+    InternalComponentBlockData,
     DeadlineBannerBlockData,
     LiveStrommixBlockData,
     WindMapBlockData,
@@ -86,6 +88,8 @@
   <OrganisationsBlock block={block as OrganisationsBlockData} />
 {:else if type === "opnform"}
   <OpnFormBlock block={block as OpnFormBlockData} />
+{:else if type === "internal_component"}
+  <InternalComponentBlock block={block as InternalComponentBlockData} />
 {:else if type === "deadline_banner"}
   <DeadlineBannerBlock block={block as DeadlineBannerBlockData} />
 {:else if type === "live_strommix"}

src/lib/components/blocks/InternalComponentBlock.svelte

@@ -0,0 +1,18 @@
+<script lang="ts">
+  import { getBlockLayoutClasses } from "$lib/block-layout";
+  import type { InternalComponentBlockData } from "$lib/block-types";
+  import ContactFormComponent from "$lib/components/internal/ContactFormComponent.svelte";
+
+  let { block }: { block: InternalComponentBlockData } = $props();
+
+  const layoutClasses = $derived(getBlockLayoutClasses(block.layout));
+  const component = $derived(block.component ?? "");
+</script>
+
+<div class={layoutClasses} data-block="InternalComponent" data-block-type="internal_component" data-block-slug={block._slug}>
+  {#if component === "form-contact"}
+    <ContactFormComponent />
+  {:else}
+    <p class="text-sm text-stein-500">Unbekannte interne Komponente: <code>{component}</code></p>
+  {/if}
+</div>

src/lib/components/internal/ContactFormComponent.svelte

@@ -0,0 +1,92 @@
+<script lang="ts">
+  import Button from "$lib/ui/Button.svelte";
+  import TextInput from "$lib/ui/TextInput.svelte";
+  import Textarea from "$lib/ui/Textarea.svelte";
+
+  type State = "idle" | "pending" | "success" | "error";
+
+  let name = $state("");
+  let email = $state("");
+  let message = $state("");
+  let honeypot = $state("");
+  let pageLoadedAt = Date.now();
+  let formState = $state<State>("idle");
+  let errorMessage = $state("");
+
+  async function handleSubmit(e: SubmitEvent) {
+    e.preventDefault();
+    if (formState === "pending") return;
+
+    formState = "pending";
+    errorMessage = "";
+
+    try {
+      const res = await fetch("/api/contact", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          name,
+          email,
+          message,
+          _honeypot: honeypot,
+          _client_age_ms: Date.now() - pageLoadedAt,
+        }),
+      });
+
+      if (res.ok) {
+        formState = "success";
+      } else {
+        const body = await res.json().catch(() => ({}));
+        errorMessage = body?.error || "Unbekannter Fehler";
+        formState = "error";
+      }
+    } catch {
+      errorMessage = "Netzwerkfehler – bitte erneut versuchen.";
+      formState = "error";
+    }
+  }
+</script>
+
+{#if formState === "success"}
+  <div class="rounded-lg border border-wald-300 bg-wald-50 px-6 py-8 text-center">
+    <p class="text-lg font-semibold text-wald-700">Nachricht gesendet!</p>
+    <p class="mt-1 text-sm text-stein-600">Wir melden uns so schnell wie möglich.</p>
+  </div>
+{:else}
+  <form onsubmit={handleSubmit} novalidate class="space-y-4">
+    <!-- Honeypot – per CSS versteckt, von Bots ausgefüllt -->
+    <div aria-hidden="true" style="position:absolute;left:-9999px;opacity:0;pointer-events:none;tab-index:-1;">
+      <label for="contact-hp">Website</label>
+      <input id="contact-hp" name="_honeypot" tabindex="-1" autocomplete="off" bind:value={honeypot} />
+    </div>
+
+    <TextInput
+      name="name"
+      label="Name"
+      placeholder="Dein Name"
+      required
+      bind:value={name}
+    />
+    <TextInput
+      name="email"
+      label="E-Mail"
+      placeholder="deine@email.de"
+      required
+      bind:value={email}
+    />
+    <Textarea
+      name="message"
+      label="Nachricht"
+      placeholder="Deine Nachricht …"
+      required
+      rows={5}
+      bind:value={message}
+    />
+
+    {#if formState === "error"}
+      <p class="text-sm text-error" role="alert">{errorMessage}</p>
+    {/if}
+
+    <Button type="submit" variant="primary" loading={formState === "pending"} label="Senden" />
+  </form>
+{/if}

src/routes/api/contact/+server.ts

@@ -0,0 +1,32 @@
+import { json } from "@sveltejs/kit";
+import { env } from "$env/dynamic/private";
+import type { RequestHandler } from "./$types";
+
+export const POST: RequestHandler = async ({ request, getClientAddress }) => {
+  const body = await request.json().catch(() => null);
+  if (!body || typeof body !== "object") {
+    return json({ error: "Ungültige Anfrage" }, { status: 400 });
+  }
+
+  const cmsBase = (env.PUBLIC_CMS_URL || "http://localhost:3000").replace(/\/$/, "");
+  const cmsEnv = env.PUBLIC_CMS_ENV || "";
+  const url = cmsEnv
+    ? `${cmsBase}/api/forms/kontakt/submit?_environment=${encodeURIComponent(cmsEnv)}`
+    : `${cmsBase}/api/forms/kontakt/submit`;
+
+  const res = await fetch(url, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      "X-Forwarded-For": getClientAddress(),
+    },
+    body: JSON.stringify(body),
+  });
+
+  if (res.ok) {
+    return json({ ok: true }, { status: 201 });
+  }
+
+  const text = await res.text().catch(() => "");
+  return json({ error: text || "Fehler beim Senden" }, { status: res.status });
+};