feat: implement RAG-enabled chat hook and admin file upload component

src/lib/api.js

@@ -1,39 +0,0 @@
-/**
- * Back-compatibility shim for the legacy `anthropicApi` interface.
- *
- * All real work lives in `./llm.js`. Existing callers (extractionPipeline,
- * learningService, testService, KnowledgeGraph, useChat) keep working
- * unchanged; new code should import `callLLM` from `./llm.js` directly.
- */
-
-import { callLLM } from './llm';
-
-export const anthropicApi = {
-  async generateContent(systemPrompt, userMessage /*, maxRetries */) {
-    const { text } = await callLLM({
-      task: 'legacy.generateContent',
-      tier: 'standard',
-      system: systemPrompt,
-      user: userMessage,
-      maxTokens: 8192,
-      temperature: 0,
-    });
-    return text;
-  },
-
-  async chat(systemPrompt, messages, opts = {}) {
-    const r = await callLLM({
-      task: 'legacy.chat',
-      tier: 'standard',
-      system: systemPrompt,
-      messages,
-      tools: opts.tools,
-      maxTokens: 1024,
-      temperature: 0.3,
-    });
-    const content = [];
-    if (r.text) content.push({ type: 'text', text: r.text });
-    for (const tu of r.toolUses) content.push({ type: 'tool_use', name: tu.name, input: tu.input });
-    return { content, stop_reason: r.stopReason };
-  },
-};