feat: surface BMC collection errors in parse-errors panel and event log

When Inspur component.log sections return {"error":"...","code":N} instead
of hardware data, the parser now:
- stores them in AnalysisResult.CollectionErrors (new model field)
- mirrors each one into result.Events with Source="BMC/<section>"
  so the chart viewer event table shows the specific BMC module
- feeds them into /api/parse-errors as bmc_collection_error entries

UI adds a collapsible "Collection diagnostics" panel below the chart
iframe (outside /chart) that appears when /api/parse-errors returns
any items; resets on data clear.

Affected sections in this dump: HDD (1458), PCIe Devices (1458),
Network Adapters (1458), Disk Backplane.

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

web/static/js/app.js

@@ -1413,6 +1413,62 @@ async function loadData(vendor, filename) {
     document.getElementById('header-log-meta').classList.remove('hidden');
 
     loadAuditViewer();
+    loadParseErrors();
+}
+
+async function loadParseErrors() {
+    const section = document.getElementById('parse-errors-section');
+    const rows = document.getElementById('parse-errors-rows');
+    const title = document.getElementById('parse-errors-title');
+    if (!section || !rows) return;
+
+    let data;
+    try {
+        const resp = await fetch('/api/parse-errors');
+        if (!resp.ok) return;
+        data = await resp.json();
+    } catch (e) {
+        return;
+    }
+
+    const items = (data && data.items) ? data.items : [];
+    if (items.length === 0) {
+        section.classList.add('hidden');
+        return;
+    }
+
+    const errorCount = items.filter(i => i.severity === 'error').length;
+    const warnCount  = items.filter(i => i.severity === 'warning').length;
+    const parts = [];
+    if (errorCount > 0) parts.push(`${errorCount} error${errorCount > 1 ? 's' : ''}`);
+    if (warnCount  > 0) parts.push(`${warnCount} warning${warnCount > 1 ? 's' : ''}`);
+    const otherCount = items.length - errorCount - warnCount;
+    if (otherCount > 0) parts.push(`${otherCount} notice${otherCount > 1 ? 's' : ''}`);
+    title.textContent = `Collection diagnostics — ${parts.join(', ')}`;
+
+    rows.innerHTML = '';
+    for (const item of items) {
+        const tr = document.createElement('tr');
+        tr.className = `parse-error-row parse-error-${item.severity || 'info'}`;
+        tr.innerHTML =
+            `<td>${escapeHtml(item.source || '')}</td>` +
+            `<td>${escapeHtml(item.path || item.category || '')}</td>` +
+            `<td>${escapeHtml(item.message || '')}</td>` +
+            `<td>${escapeHtml(item.detail || '')}</td>`;
+        rows.appendChild(tr);
+    }
+
+    section.classList.remove('hidden');
+}
+
+let parseErrorsCollapsed = false;
+function toggleParseErrors() {
+    const body   = document.getElementById('parse-errors-body');
+    const toggle = document.getElementById('parse-errors-toggle');
+    if (!body) return;
+    parseErrorsCollapsed = !parseErrorsCollapsed;
+    body.style.display   = parseErrorsCollapsed ? 'none' : '';
+    toggle.textContent   = parseErrorsCollapsed ? '▼' : '▲';
 }
 
 function loadAuditViewer() {
@@ -1468,6 +1524,15 @@ async function clearData() {
         if (frame) {
             frame.src = 'about:blank';
         }
+        const parseErrSection = document.getElementById('parse-errors-section');
+        if (parseErrSection) parseErrSection.classList.add('hidden');
+        const parseErrRows = document.getElementById('parse-errors-rows');
+        if (parseErrRows) parseErrRows.innerHTML = '';
+        parseErrorsCollapsed = false;
+        const parseErrBody = document.getElementById('parse-errors-body');
+        if (parseErrBody) parseErrBody.style.display = '';
+        const parseErrToggle = document.getElementById('parse-errors-toggle');
+        if (parseErrToggle) parseErrToggle.textContent = '▲';
     } catch (err) {
         console.error('Failed to clear data:', err);
     }