webapp/reports: trim list to Serial/Model/Date/Result

Drops the filename, type, and size columns from the Blancco Reports
list - operators want bay-identification fields, not file metadata.
Filename moves to a row hover tooltip (title attribute) so it is still
recoverable for ad-hoc lookups.

Adds a Result column derived from each XML report's overall erasure
state:
  * Successful  -> green badge (all erasure entries report Successful)
  * Failed      -> red badge   (any erasure entry reports a non-Successful state)
  * other       -> grey badge with the verbatim state
  * blank/non-XML -> dash

The state roll-up lives in the blancco_reports route's per-file parse
loop next to the existing serial/model extraction.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

webapp/templates/reports.html

@@ -16,30 +16,25 @@
     <table class="table table-hover mb-0">
       <thead class="table-light">
         <tr>
-          <th>Filename</th>
           <th>Serial</th>
           <th>Model</th>
-          <th>Type</th>
-          <th>Size</th>
           <th>Date</th>
+          <th>Result</th>
           <th class="text-end">Actions</th>
         </tr>
       </thead>
       <tbody>
         {% for r in reports %}
-        <tr>
-          <td><code>{{ r.filename }}</code></td>
+        <tr title="{{ r.filename }}">
           <td>{% if r.serial %}<code>{{ r.serial }}</code>{% else %}<span class="text-muted small">-</span>{% endif %}</td>
           <td class="small">{{ r.model or '-' }}</td>
-          <td><span class="badge bg-info text-dark">{{ r.type }}</span></td>
-          <td>
-            {% if r.size > 1048576 %}
-              {{ "%.1f"|format(r.size / 1048576) }} MB
-            {% else %}
-              {{ "%.1f"|format(r.size / 1024) }} KB
-            {% endif %}
-          </td>
           <td>{{ r.modified | timestamp_fmt }}</td>
+          <td>
+            {% if r.state == 'Successful' %}<span class="badge bg-success">Successful</span>
+            {% elif r.state == 'Failed' %}<span class="badge bg-danger">Failed</span>
+            {% elif r.state %}<span class="badge bg-secondary">{{ r.state }}</span>
+            {% else %}<span class="text-muted small">-</span>{% endif %}
+          </td>
           <td class="text-end text-nowrap">
             {% if r.filename.lower().endswith('.xml') %}
             <a href="{{ url_for('blancco_view_report', filename=r.filename) }}"