feat: add investigation map workspace view

lib/map/investigation-map-adapter.js

@@ -0,0 +1,63 @@
+/**
+ * Investigation Map Mock Adapter
+ *
+ * Provides the Investigation Map with a set of investigation topics and their
+ * current status (established / current / unknown).
+ *
+ * TODO: Replace this mock adapter when the reasoning engine emits real
+ * investigation data. The eventual contract should provide:
+ *   - `investigationTopics`: [{ title, status, evidenceCount? }]
+ *   - `topicStatus` values: "established" | "current" | "unknown"
+ *   - `topicOrdering`: the reasoning-engine-determined sequence
+ *   - `evidenceCount`: optional count of supporting evidence per topic
+ *
+ * Until then, this adapter drives a realistic mock progression across turns.
+ */
+
+/** @type {Array<{ title: string }>} */
+const TOPICS = [
+  { title: "Central situation" },
+  { title: "Complaint trend direction" },
+  { title: "Measurement basis" },
+  { title: "Production volume context" },
+  { title: "QA process changes" },
+  { title: "Product change log" },
+  { title: "Support response patterns" },
+  { title: "Prior similar cases" },
+];
+
+/**
+ * Status progression per turn index.
+ * The reasoning engine will eventually determine these values.
+ */
+const PROGRESSION = [
+  // Turn 0 — initial analysis just started
+  ["established", "unknown", "unknown", "unknown", "unknown", "unknown", "unknown", "unknown"],
+  // Turn 1 — first question answered
+  ["established", "established", "current", "unknown", "unknown", "unknown", "unknown", "unknown"],
+  // Turn 2 — second question answered
+  ["established", "established", "established", "current", "unknown", "unknown", "unknown", "unknown"],
+  // Turn 3 — third question answered
+  ["established", "established", "established", "established", "current", "unknown", "unknown", "unknown"],
+  // Turn 4 — fourth question answered
+  ["established", "established", "established", "established", "established", "current", "unknown", "unknown"],
+  // Turn 5 — fifth question answered
+  ["established", "established", "established", "established", "established", "established", "current", "unknown"],
+  // Turn 6+ — final turn
+  ["established", "established", "established", "established", "established", "established", "established", "current"],
+];
+
+/**
+ * Get investigation map topics for a given turn index.
+ * @param {number} turnIndex - Zero-based turn number (0 = initial analysis).
+ * @returns {{ title: string, status: 'established' | 'current' | 'unknown' }[]}
+ */
+export function getInvestigationMapTopics(turnIndex) {
+  const idx = Math.min(turnIndex, PROGRESSION.length - 1);
+  return TOPICS.map((topic, i) => ({
+    title: topic.title,
+    status: PROGRESSION[idx][i],
+  }));
+}
+
+export default getInvestigationMapTopics;