Add Verisoo attest/verify web MVP — full attestation lifecycle

Attest page (/attest):
- Image upload with optional caption and location
- EXIF auto-extraction toggle
- Creates Ed25519-signed attestation record
- Stores in verisoo append-only binary log + LMDB index
- Displays: record ID, attestor fingerprint, timestamp, image hashes

Verify page (/verify):
- Image upload for verification against local attestation log
- SHA-256 exact matching + perceptual hash matching (pHash, dHash)
- Shows match type (exact/perceptual), hash distances, attestor info
- Color-coded distance badges (green=0, info<5, warning<10, danger>=10)

Attestation log (/attest/log):
- Lists recent attestations with short ID, attestor, timestamp, SHA-256
- Shows total record count

Verified: full lifecycle works — attest image → verify same image → exact match found

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

frontends/web/templates/attest/log.html

@@ -1,10 +1,47 @@
 {% extends "base.html" %}
 {% block title %}Attestation Log — SooSeF{% endblock %}
+
 {% block content %}
-<h2><i class="bi bi-journal-text me-2"></i>Attestation Log</h2>
-<p class="text-muted">Recent attestations from the local append-only log.</p>
-<div class="alert alert-info">
-    <i class="bi bi-info-circle me-2"></i>
-    Lists attestation records with filters by attestor, date range, and verification status.
+<div class="row justify-content-center">
+    <div class="col-lg-10">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-journal-text me-2"></i>Attestation Log</h4>
+            <span class="badge bg-info">{{ total }} total record{{ 's' if total != 1 }}</span>
+        </div>
+
+        {% if records %}
+        <div class="table-responsive">
+            <table class="table table-hover table-dark">
+                <thead>
+                    <tr>
+                        <th>#</th>
+                        <th>Short ID</th>
+                        <th>Attestor</th>
+                        <th>Timestamp</th>
+                        <th>SHA-256</th>
+                        <th>Caption</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    {% for item in records %}
+                    <tr>
+                        <td class="text-muted">{{ item.index }}</td>
+                        <td><code class="text-info">{{ item.record.short_id }}</code></td>
+                        <td><code class="small">{{ item.record.attestor_fingerprint[:12] }}...</code></td>
+                        <td class="small">{{ item.record.timestamp.strftime('%Y-%m-%d %H:%M') }}</td>
+                        <td><code class="small text-warning">{{ item.record.image_hashes.sha256[:16] }}...</code></td>
+                        <td class="small text-muted">{{ item.record.metadata.get('caption', '') | truncate(40) }}</td>
+                    </tr>
+                    {% endfor %}
+                </tbody>
+            </table>
+        </div>
+        {% else %}
+        <div class="alert alert-secondary">
+            <i class="bi bi-inbox me-2"></i>
+            No attestations yet. <a href="/attest" class="alert-link">Attest your first image</a>.
+        </div>
+        {% endif %}
+    </div>
 </div>
 {% endblock %}