Add registration links to task pages

Author: phoerious

clef26/pan26-web/generated-content-analysis.html

@@ -34,6 +34,7 @@ <h1 class="uk-margin-remove-top">Voight-Kampff Generative AI Detection 2026</h1>
             <h2 id="synopsis">Synopsis</h2>
             <ul class="uk-list uk-list-bullet">
                 <li>Task: Given a (potentially obfuscated) text, decide whether it was written by a human or an AI.</li>
+                <li>Registration: [<a href="https://clef-labs-registration.dipintra.it/">CLEF labs</a>] [<a href="https://www.tira.io/task-overview/generative-ai-authorship-verification-panclef-2026/">Tira</a>]</li>
                 <li>Important dates:
                     <ul>
                         <li><strong>May 07, 2026:</strong> software submission</li>

clef26/pan26-web/generated-plagiarism-detection.html

@@ -34,6 +34,7 @@ <h1 class="uk-margin-remove-top">Generative Plagiarism Detection 2026</h1>
             <h2 id="synopsis">Synopsis</h2>
             <ul>
                 <li>Task: Given a pair of documents, your task is to identify all contiguous maximal-length passages of reused text between them.</li>
+                <li>Registration: [<a href="https://clef-labs-registration.dipintra.it/">CLEF labs</a>]</li>
                 <li>Important dates:
                     <ul>
                         <li><strong>May 07, 2026:</strong> software submission</li>

clef26/pan26-web/reasoning-trajectory-detection.html

@@ -29,6 +29,7 @@ <h1 class="uk-margin-remove-top">Reasoning Trajectory Detection 2026</h1>
             <h2 id="synopsis">Synopsis</h2>
             <ul class="uk-list uk-list-bullet">
                 <li>Task: TBA.</li>
+                <li>Registration: [<a href="https://clef-labs-registration.dipintra.it/">CLEF labs</a>]</li>
                 <li>Important dates:
                     <ul>
                         <li><strong>May 07, 2026:</strong> software submission</li>

clef26/pan26-web/style-change-detection.html

@@ -31,6 +31,7 @@ <h1 class="uk-margin-remove-top">Multi-Author Writing Style Analysis 2026</h1>
             <h2 id="synopsis">Synopsis</h2>
             <ul>
                 <li>Task: Given a document, determine at which positions the author changes.</li>
+                <li>Registration: [<a href="https://clef-labs-registration.dipintra.it/">CLEF labs</a>]</li>
                 <li>Important dates:
                     <ul>
                         <li><strong>May 07, 2026:</strong> software submission</li>

clef26/pan26-web/text-watermarking.html

@@ -29,6 +29,7 @@ <h1 class="uk-margin-remove-top">Text Watermarking 2026</h1>
             <h2 id="synopsis">Synopsis</h2>
             <ul class="uk-list uk-list-bullet">
                 <li>Task: TBA.</li>
+                <li>Registration: [<a href="https://clef-labs-registration.dipintra.it/">CLEF labs</a>]</li>
                 <li>Important dates:
                     <ul>
                         <li><strong>May 07, 2026:</strong> software submission</li>