fix: handle mixed relation/entity types in bm_context results

BM MCP returns two types in related_results:
- type='relation': has relation_type, from_entity, to_entity (no title)
- type='entity': has title, permalink (may have relation_type)

Plugin assumed all items had title+permalink+relation_type, causing
'undefined' in output. Now handles both types correctly.

Also fixed schema_validate error response handling (from prev commit).

Author: bm-clawd

bm-client.ts

@@ -67,9 +67,12 @@ export interface ContextResult {
       content: string
     }>
     related_results: Array<{
-      title: string
+      type: "relation" | "entity"
+      title?: string
       permalink: string
-      relation_type: string
+      relation_type?: string
+      from_entity?: string
+      to_entity?: string
     }>
   }>
 }

tools/context.test.ts

@@ -77,12 +77,12 @@ describe("context tool", () => {
             ],
             related_results: [
               {
-                title: "Related Note 1",
+                type: "entity", title: "Related Note 1",
                 permalink: "related-note-1",
                 relation_type: "references",
               },
               {
-                title: "Related Note 2",
+                type: "entity", title: "Related Note 2",
                 permalink: "related-note-2",
                 relation_type: "follows_from",
               },
@@ -211,7 +211,7 @@ describe("context tool", () => {
             observations: [{ category: "note", content: "Single observation" }],
             related_results: [
               {
-                title: "Related to Second",
+                type: "entity", title: "Related to Second",
                 permalink: "related-to-second",
                 relation_type: "depends_on",
               },
@@ -315,12 +315,12 @@ describe("context tool", () => {
             observations: [],
             related_results: [
               {
-                title: "Related Note with Long Title",
+                type: "entity", title: "Related Note with Long Title",
                 permalink: "related-note-with-long-title",
                 relation_type: "references",
               },
               {
-                title: "Short Note",
+                type: "entity", title: "Short Note",
                 permalink: "short",
                 relation_type: "follows_from",
               },

tools/context.ts

@@ -76,10 +76,15 @@ export function registerContextTool(
 
             if (result.related_results?.length > 0) {
               const rels = result.related_results
-                .map(
-                  (r) =>
-                    `- ${r.relation_type} → **${r.title}** (${r.permalink})`,
-                )
+                .map((r) => {
+                  if (r.type === "relation") {
+                    return `- ${r.relation_type} → **${r.to_entity}**`
+                  }
+                  const label = r.relation_type
+                    ? `${r.relation_type} → **${r.title}**`
+                    : `**${r.title}**`
+                  return r.permalink ? `- ${label} (${r.permalink})` : `- ${label}`
+                })
                 .join("\n")
               sections.push(`### Related\n${rels}`)
             }