restructure: flatten workspace nesting, move devcontainer to root

- backend/workspaces/backend/ → backend/
- backend/workspaces/frontend/ → frontend/
- backend/.devcontainer/ + .vscode/ → repo root (where VS Code expects them)
- loose scripts/SQL files → scripts/
- replace nested git repo with single repo at project root
- update docker-compose.yml build context and devcontainer.json path
- add root .gitignore

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

frontend/src/routes/documents/[id]/+page.server.ts

@@ -0,0 +1,37 @@
+import { error, redirect } from '@sveltejs/kit';
+import { env } from '$env/dynamic/private';
+
+export async function load({ params, fetch }) {
+    const { id } = params;
+
+
+    const baseUrl = env.API_INTERNAL_URL || 'http://localhost:8080';
+
+    try {
+        const res = await fetch(`${baseUrl}/api/documents/${id}`);
+
+        if (res.status === 404) {
+            throw error(404, 'Dokument nicht gefunden');
+        }
+
+        if (res.status === 401) {
+            throw redirect(302, '/login');
+        }
+
+        if (!res.ok) {
+            console.error(`Backend Fehler (${res.status}):`, res.statusText);
+            throw error(500, 'Fehler beim Laden des Dokuments');
+        }
+
+        const document = await res.json();
+
+        return {
+            document
+        };
+    } catch (e) {
+        // Fehlerbehandlung
+        if (e.status) throw e; // Redirects und HttpErrors durchlassen
+        console.error("Ladefehler:", e);
+        throw error(500, 'Verbindung zum Server fehlgeschlagen');
+    }
+}