feat(server): Domain 2 Phase 1 — boocontext MCP client + 4 new code intelligence tools

Shared boocontext MCP client (boocontext_client.ts) wrapping the existing
mcp-client.ts callTool() infrastructure with 32KB truncation and error
handling. Used by get_code_health.

4 new first-class agent tools backed by the boocontext MCP server:
- get_code_health — A-F grades per file across 7 dimensions, project health
  summary, refactoring candidates (wraps boocontext_health)
- get_code_impact — merged symbol trace + blast radius in one call (wraps
  boocontext_impact, replaces two-step get_symbol_info+get_blast_radius)
- get_type_info — TypeScript type recovery via type-inject MCP (wraps
  boocontext_types, returns signatures, interfaces, generics, JSDoc)
- get_code_map — DCP-compressed context map with compress toggle (wraps
  boocontext_map, 10x token reduction vs full scan)

All 4 registered in ALL_TOOLS as read-only tools.

apps/server/src/services/boocontext_client.ts

@@ -0,0 +1,110 @@
+/**
+ * v2.7.18: shared MCP client wrapper for the boocontext sidecar.
+ *
+ * Calls into the existing multi-server MCP client infrastructure
+ * (services/mcp-client.ts) which connects to boocontext as a stdio
+ * MCP process defined in data/mcp.json (server name "boocontext",
+ * command: `node /opt/forks/boocontext/dist/standalone.js`).
+ *
+ * The boocontext MCP server is initialized once at app boot in
+ * index.ts via initMcp() and the actual MCP tool call routing is
+ * handled by mcp-client.ts:callTool() — this module is a thin
+ * convenience wrapper that prepends the "boocontext_" server prefix,
+ * normalises the response, and applies inline truncation matching
+ * the same pattern as codecontext_client.ts.
+ *
+ * Usage:
+ *   import { callBoocontext } from './services/boocontext_client.js';
+ *   const resp = await callBoocontext({
+ *     toolName: 'codesight_get_summary',
+ *     args: { directory: '/opt/boocode' },
+ *   });
+ */
+
+import { callTool } from './mcp-client.js';
+import { truncateIfNeeded } from './truncate.js';
+
+// ---- Exported types ----
+
+export interface BoocontextRequest {
+  /** Unprefixed tool name as defined on the boocontext MCP server
+   * (e.g. "codesight_scan", "boocontext_overview", "codesight_get_summary"). */
+  toolName: string;
+  /** Arguments to pass to the tool. */
+  args: Record<string, unknown>;
+}
+
+export interface BoocontextResponse {
+  /** The tool output text. */
+  result: string;
+  /** Whether the result was truncated to fit the inline limit. */
+  truncated: boolean;
+  /** Opaque id pointing at the full pre-slice content on tmpfs, set when
+   * truncated=true and storage succeeded. */
+  outputPath?: string;
+}
+
+// ---- Constants ----
+
+/** Must match the server name in data/mcp.json. */
+const BOOCONTEXT_SERVER_NAME = 'boocontext';
+
+/** Inline truncation limit, matching codecontext_client.ts. */
+const TRUNCATION_LIMIT = 32_000;
+
+// ---- Public API ----
+
+/**
+ * Call a boocontext MCP tool by its unprefixed name.
+ *
+ * Prepends the "boocontext_" server prefix, delegates to the
+ * multi-server MCP client's callTool(), and normalises the response
+ * into a BoocontextResponse with inline truncation.
+ *
+ * @param req   The tool name and arguments.
+ * @param log   Optional Fastify-compatible logger (for debug traces).
+ * @returns     The tool result, possibly truncated.
+ * @throws      If the boocontext server is not connected or the tool
+ *              returns an MCP-level error.
+ */
+export async function callBoocontext(
+  req: BoocontextRequest,
+  log?: { debug?: (obj: object, msg: string) => void; warn?: (obj: object, msg: string) => void },
+): Promise<BoocontextResponse> {
+  const prefixedName = `${BOOCONTEXT_SERVER_NAME}_${req.toolName}`;
+
+  log?.debug?.({ tool: prefixedName }, 'boocontext: calling tool');
+
+  const raw = await callTool(prefixedName, req.args);
+
+  // callTool returns { error: true, output: string } on failure (both
+  // for MCP-level isError and for network/protocol exceptions).
+  if (typeof raw === 'object' && raw !== null && (raw as Record<string, unknown>).error === true) {
+    const errOutput = (raw as Record<string, unknown>).output ?? 'Unknown MCP error';
+    throw new Error(`boocontext error: ${String(errOutput)}`);
+  }
+
+  const result = typeof raw === 'string' ? raw : JSON.stringify(raw);
+
+  // Inline truncation at 32 kB, matching codecontext_client.ts.
+  // The model gets a clear hint about how to narrow the next call
+  // rather than a silent cut.
+  if (result.length > TRUNCATION_LIMIT) {
+    const truncated = result.slice(0, TRUNCATION_LIMIT);
+    const omitted = result.length - TRUNCATION_LIMIT;
+    const slicedWithMarker =
+      `${truncated}\n\n[truncated, ${omitted} chars omitted; narrow with additional filters]`;
+    const wrapped = await truncateIfNeeded({
+      fullContent: result,
+      slicedContent: slicedWithMarker,
+      wasTruncated: true,
+    });
+    return {
+      result: wrapped.content,
+      truncated: wrapped.truncated,
+      ...(wrapped.outputPath ? { outputPath: wrapped.outputPath } : {}),
+    };
+  }
+
+  return { result, truncated: false };
+}