feat(advisor): Evidence Workspace — structured panes, markdown, sources as knowledge units

Rebuilds the Compliance Advisor floating widget from a plain chat into an Evidence
Workspace: pinned last question, markdown-rendered answer (clean prose), and separate
panes for Sources (hierarchical Knowledge Units), Figures (C8, conditional) and
Footnotes (C-FN), plus a stats bar (Quellen/Regelwerke/Diagramme/Fußnoten). Scrollable
turn history; stays a floating icon on every SDK page.

Architecture (user direction): the frontend renders ONLY structured evidence and NEVER
parses the answer text. The proxy now returns a JSON AdvisorEvidenceMeta line followed
by the streamed markdown answer; advisor-rag exposes structured results; an adapter maps
RAG/compiler output to the frontend envelope. Figures/footnotes wire in once the
RAG-ingestion contract lands (requested on the board) — figures pane is conditional.

- lib/sdk/advisor/{evidence,evidence-adapter}.ts (+ adapter test, 7 cases)
- components/sdk/advisor/* panes + in-house safe Markdown (no new dep, no dangerouslySetInnerHTML) + test
- useAdvisorStream (meta-line parse + streamed answer) + useAdvisorEmail (escaped)
- proxy: evidence-meta-v1 envelope + clean-prose prompt (no inline citations)
- tsc clean, 11 vitest pass, check-loc 0. ESLint not installed in this node_modules -> CI lints on push.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

admin-compliance/components/sdk/advisor/FiguresPane.tsx

@@ -0,0 +1,71 @@
+'use client'
+
+import { Image as ImageIcon, ExternalLink } from 'lucide-react'
+import type { FigureUnit } from '@/lib/sdk/advisor/evidence'
+import { PaneHeader } from './PaneHeader'
+
+function FigureCard({ fig }: { fig: FigureUnit }) {
+  const canOpen = !!fig.imageUrl && /^https?:\/\//i.test(fig.imageUrl)
+  return (
+    <div className="rounded-lg border border-gray-200 bg-white p-2.5">
+      <div className="flex items-start justify-between gap-2">
+        <div className="text-xs font-semibold text-gray-900">
+          {fig.label}
+          {fig.caption ? <span className="font-normal text-gray-600"> — {fig.caption}</span> : null}
+        </div>
+        {canOpen && (
+          <a
+            href={fig.imageUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="flex flex-shrink-0 items-center gap-0.5 rounded px-1.5 py-0.5 text-[11px] font-medium text-indigo-600 hover:bg-indigo-50"
+          >
+            <ExternalLink className="h-3 w-3" />
+            Original anzeigen
+          </a>
+        )}
+      </div>
+      <div className="mt-0.5 text-[11px] text-gray-500">
+        Quelle: {fig.source.short}
+        {fig.section ? ` · ${fig.section}` : ''}
+      </div>
+      {canOpen ? (
+        <a href={fig.imageUrl} target="_blank" rel="noopener noreferrer" className="mt-1.5 block">
+          {/* eslint-disable-next-line @next/next/no-img-element */}
+          <img
+            src={fig.imageUrl}
+            alt={fig.caption || fig.label}
+            loading="lazy"
+            className="max-h-44 w-full rounded border border-gray-100 object-contain"
+          />
+        </a>
+      ) : (
+        <div className="mt-1.5 flex items-center justify-center rounded border border-dashed border-gray-200 bg-gray-50 px-3 py-5 text-[11px] text-gray-400">
+          Original-Abbildung folgt
+        </div>
+      )}
+      {fig.visionSummary && (
+        <p className="mt-1.5 text-[11px] italic text-gray-500">{fig.visionSummary}</p>
+      )}
+    </div>
+  )
+}
+
+/** Figures pane (C8) — original document figures, rendered only when present. */
+export function FiguresPane({ figures }: { figures: FigureUnit[] }) {
+  if (figures.length === 0) return null
+  return (
+    <section>
+      <PaneHeader
+        icon={<ImageIcon className="h-3.5 w-3.5 text-gray-500" />}
+        title="Abbildungen & Diagramme"
+        count={figures.length}
+      />
+      <div className="space-y-1.5">
+        {figures.map((f) => (
+          <FigureCard key={f.id} fig={f} />
+        ))}
+      </div>
+    </section>
+  )
+}