feat(pitch-deck): add confidentiality & disclaimer to magic link email

Adds legal footer to the investor invite email with:
- Confidentiality obligation (3 years, purpose limitation)
- Disclaimer (not an offer, projections only, risk of total loss)
- Jurisdiction: Konstanz, German law

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pitch-deck/lib/email.ts

@@ -73,10 +73,22 @@ export async function sendMagicLinkEmail(
                   </td>
                 </tr>
                 <tr>
-                  <td style="padding:20px 40px 40px;border-top:1px solid rgba(255,255,255,0.05);">
+                  <td style="padding:20px 40px 12px;border-top:1px solid rgba(255,255,255,0.05);">
                     <p style="margin:0;font-size:12px;color:rgba(255,255,255,0.25);line-height:1.5;">
                       If you did not expect this email, you can safely ignore it.
-                      This is an AI-first company — we don't do PDFs.
+                    </p>
+                  </td>
+                </tr>
+                <tr>
+                  <td style="padding:0 40px 40px;">
+                    <p style="margin:0 0 8px;font-size:10px;font-weight:600;color:rgba(255,255,255,0.3);text-transform:uppercase;letter-spacing:0.5px;">
+                      Confidentiality &amp; Disclaimer
+                    </p>
+                    <p style="margin:0 0 6px;font-size:10px;color:rgba(255,255,255,0.18);line-height:1.5;">
+                      This pitch deck is confidential and has been prepared exclusively for the personally invited recipient. By opening this link, the recipient agrees: (a) The content must be treated confidentially and may not be disclosed, copied or made accessible to third parties. Excluded are advisors (lawyers, tax advisors) professionally bound to secrecy. (b) The information may only be used for evaluating a possible participation. (c) This confidentiality obligation applies for three (3) years from transmission, regardless of whether a participation materializes.
+                    </p>
+                    <p style="margin:0;font-size:10px;color:rgba(255,255,255,0.18);line-height:1.5;">
+                      This document constitutes neither an offer to sell nor a solicitation of an offer to acquire securities. It is not a securities prospectus. All financial figures are projections and do not constitute a guarantee of future results. An investment in a young company involves significant risks, including the risk of total loss. German law applies. Place of jurisdiction is Konstanz, Germany.
                     </p>
                   </td>
                 </tr>