Add Tool info links and MCP section to tool cards and preview pages

- Dashboard: add "Tool info" link → preview.php on every tool card footer
- Landing page: convert lt-card <a> to div+onclick, add footer with "Learn more" link and copyable MCP slug pill
- preview.php: add MCP Integration section per tool (slug, copy button, claude_desktop_config.json snippet, login note)
- CSS: lt-card__footer, lt-card__mcp-pill, lt-preview-mcp section styles

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

assets/css/dbn-tools-redesign.css

@@ -877,3 +877,122 @@ body[data-active-tool='citations'] .results {
     padding: 0.55rem 1rem;
   }
 }
+
+/* ── Landing page card footer (Tool info + MCP pill) ──────────── */
+.lt-card__footer {
+  display: flex;
+  align-items: center;
+  gap: 0.6rem;
+  flex-wrap: wrap;
+  margin-top: 1rem;
+  padding-top: 0.75rem;
+  border-top: 1px solid rgba(0, 32, 91, 0.08);
+}
+.lt-card__footer-link--primary {
+  font-family: ui-monospace, 'IBM Plex Mono', monospace;
+  font-size: 0.68rem;
+  font-weight: 700;
+  letter-spacing: 0.06em;
+  text-transform: uppercase;
+  color: var(--dbn-blue);
+  text-decoration: none;
+}
+.lt-card__footer-link--primary:hover { color: var(--dbn-red); }
+.lt-card__mcp-pill {
+  font-family: ui-monospace, 'IBM Plex Mono', monospace;
+  font-size: 0.64rem;
+  background: #f1f5f9;
+  border: 1px solid #e2e8f0;
+  color: #64748b;
+  padding: 2px 8px;
+  border-radius: 4px;
+  cursor: pointer;
+  white-space: nowrap;
+  margin-left: auto;
+  transition: background 0.15s;
+}
+.lt-card__mcp-pill:hover { background: #e2e8f0; }
+
+/* ── Preview page MCP section ─────────────────────────────────── */
+.lt-preview-mcp {
+  background: #f8fafc;
+  border-top: 1px solid #e5e7eb;
+  border-bottom: 1px solid #e5e7eb;
+  padding: 3rem 1.5rem;
+}
+.lt-preview-mcp__inner {
+  max-width: 760px;
+  margin: 0 auto;
+  display: flex;
+  flex-direction: column;
+  gap: 1.25rem;
+}
+.lt-preview-mcp__head {
+  display: flex;
+  align-items: flex-start;
+  gap: 1rem;
+}
+.lt-preview-mcp__icon { font-size: 1.6rem; line-height: 1; flex-shrink: 0; margin-top: 0.15rem; }
+.lt-preview-mcp__title {
+  font-size: 1.25rem;
+  font-weight: 700;
+  color: var(--dbn-blue);
+  margin: 0 0 0.25rem;
+}
+.lt-preview-mcp__sub { font-size: 0.9rem; color: #6b7280; margin: 0; }
+.lt-preview-mcp__slug-row {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  background: #fff;
+  border: 1px solid #e5e7eb;
+  border-radius: 8px;
+  padding: 0.7rem 1rem;
+  flex-wrap: wrap;
+}
+.lt-preview-mcp__slug-label { font-size: 0.8rem; color: #6b7280; flex-shrink: 0; }
+.lt-preview-mcp__slug {
+  font-family: ui-monospace, 'IBM Plex Mono', monospace;
+  font-size: 0.9rem;
+  color: var(--dbn-blue);
+  font-weight: 600;
+  flex: 1;
+}
+.lt-preview-mcp__copy {
+  padding: 0.3rem 0.85rem;
+  background: var(--dbn-blue);
+  color: #fff;
+  border: none;
+  border-radius: 5px;
+  font-size: 0.78rem;
+  font-weight: 600;
+  cursor: pointer;
+  flex-shrink: 0;
+  transition: background 0.15s;
+}
+.lt-preview-mcp__copy:hover { background: var(--dbn-soft-blue); }
+.lt-preview-mcp__snippet { display: flex; flex-direction: column; gap: 0.4rem; }
+.lt-preview-mcp__snippet-label {
+  font-family: ui-monospace, 'IBM Plex Mono', monospace;
+  font-size: 0.7rem;
+  color: #9ca3af;
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+}
+.lt-preview-mcp__pre {
+  background: #1e293b;
+  color: #e2e8f0;
+  font-family: ui-monospace, 'IBM Plex Mono', monospace;
+  font-size: 0.82rem;
+  line-height: 1.65;
+  padding: 1.1rem 1.25rem;
+  border-radius: 8px;
+  overflow-x: auto;
+  margin: 0;
+}
+.lt-preview-mcp__note {
+  font-size: 0.82rem;
+  color: #9ca3af;
+  margin: 0;
+}
+.lt-preview-mcp__note a { color: var(--dbn-blue); }