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/EvidenceWorkspace.tsx

@@ -0,0 +1,51 @@
+'use client'
+
+import { useEffect, useRef } from 'react'
+import type { AdvisorTurn } from './useAdvisorStream'
+import { StickyQuestion } from './StickyQuestion'
+import { TurnView } from './TurnView'
+import { AdvisorEmptyState } from './EmptyState'
+
+/**
+ * The Evidence Workspace body: a pinned "last question" + a scrollable history of turns, each
+ * showing the answer alongside its sources / figures / footnotes. Scroll up to revisit a past
+ * answer with its full evidence.
+ */
+export function EvidenceWorkspace({
+  turns,
+  exampleQuestions,
+  onExample,
+}: {
+  turns: AdvisorTurn[]
+  exampleQuestions: string[]
+  onExample: (q: string) => void
+}) {
+  const endRef = useRef<HTMLDivElement>(null)
+  const latest = turns[turns.length - 1]
+
+  // Scroll to the newest turn when a question is added (not on every streamed token,
+  // so the user can scroll up to review history while the answer streams).
+  useEffect(() => {
+    endRef.current?.scrollIntoView({ behavior: 'smooth' })
+  }, [turns.length])
+
+  if (turns.length === 0) {
+    return (
+      <div className="flex-1 overflow-y-auto bg-gray-50">
+        <AdvisorEmptyState exampleQuestions={exampleQuestions} onExampleClick={onExample} />
+      </div>
+    )
+  }
+
+  return (
+    <div className="flex-1 overflow-y-auto bg-gray-50">
+      {latest && <StickyQuestion question={latest.question} />}
+      <div className="space-y-4 p-4">
+        {turns.map((t, i) => (
+          <TurnView key={t.id} turn={t} showQuestion={i !== turns.length - 1} />
+        ))}
+        <div ref={endRef} />
+      </div>
+    </div>
+  )
+}