phase-9: domain-driven architecture complete

- Restructured server layer with 5 domains: shared, screener, portfolio, calls, finance
- Migrated 58 TypeScript files to domain-driven structure
- Updated CLAUDE.md with new architecture documentation
- Added .gitignore rules for .md files (except CLAUDE.md)
- Removed unused CatalystAnalyst import from app.ts
- Fixed lint errors: removed unused imports, fixed regex escape, added console suppressions
- Verified no sensitive data in git history
- Server code compiles cleanly with TypeScript strict mode

server/domains/shared/adapters/AnthropicClient.ts

@@ -0,0 +1,31 @@
+import Anthropic from '@anthropic-ai/sdk';
+
+/**
+ * Thin wrapper around the Anthropic SDK.
+ * Handles initialisation and raw message completion only —
+ * prompt construction and response parsing stay in LLMAnalyst (service layer).
+ */
+export class AnthropicClient {
+  private client: Anthropic | null;
+
+  constructor() {
+    this.client = process.env.ANTHROPIC_API_KEY
+      ? new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY })
+      : null;
+  }
+
+  get isAvailable(): boolean {
+    return this.client !== null;
+  }
+
+  async complete(system: string, userMessage: string): Promise<string | null> {
+    if (!this.client) return null;
+    const response = await this.client.messages.create({
+      model: 'claude-haiku-4-5',
+      max_tokens: 1024,
+      system,
+      messages: [{ role: 'user', content: userMessage }],
+    });
+    return (response.content[0] as { text?: string })?.text ?? null;
+  }
+}