feat(linkedin): add prospect-wizard app with scraping and visualization

Add new LinkedIn prospect discovery tool with three main components:
- c4ai_discover.py for company and people scraping
- c4ai_insights.py for org chart and decision maker analysis
- Interactive graph visualization with company/people exploration

Features include:
- Configurable LinkedIn search and scraping
- Org chart generation with decision maker scoring
- Interactive network graph visualization
- Company similarity analysis
- Chat interface for data exploration

Requires: crawl4ai, openai, sentence-transformers, networkx

docs/apps/linkdin/templates/ai.js

@@ -0,0 +1,50 @@
+// ==== File: ai.js ====
+
+class ApiHandler {
+    constructor(apiKey = null) {
+      this.apiKey = apiKey || localStorage.getItem("openai_api_key") || "";
+      console.log("ApiHandler ready");
+    }
+  
+    setApiKey(k) {
+      this.apiKey = k.trim();
+      if (this.apiKey) localStorage.setItem("openai_api_key", this.apiKey);
+    }
+  
+    async *chatStream(messages, {model = "gpt-4o", temperature = 0.7} = {}) {
+      if (!this.apiKey) throw new Error("OpenAI API key missing");
+      const payload = {model, messages, stream: true, max_tokens: 1024};
+      const controller = new AbortController();
+  
+      const res = await fetch("https://api.openai.com/v1/chat/completions", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          Authorization: `Bearer ${this.apiKey}`,
+        },
+        body: JSON.stringify(payload),
+        signal: controller.signal,
+      });
+      if (!res.ok) throw new Error(`OpenAI: ${res.statusText}`);
+      const reader = res.body.getReader();
+      const dec = new TextDecoder();
+  
+      let buf = "";
+      while (true) {
+        const {done, value} = await reader.read();
+        if (done) break;
+        buf += dec.decode(value, {stream: true});
+        for (const line of buf.split("\n")) {
+          if (!line.startsWith("data: ")) continue;
+          if (line.includes("[DONE]")) return;
+          const json = JSON.parse(line.slice(6));
+          const delta = json.choices?.[0]?.delta?.content;
+          if (delta) yield delta;
+        }
+        buf = buf.endsWith("\n") ? "" : buf; // keep partial line
+      }
+    }
+  }
+  
+  window.API = new ApiHandler();
+