feat: add Leads tab and Hide Assessed filter in Browse

- db.py: get_enriched() accepts ai_only + lead_quality params
- main.py: /api/enriched exposes ai_only + lead_quality query params;
  new /api/export/leads endpoint produces CSV with contacts + pitch
- index.html:
  - New "Leads 🤖" tab shows all AI-assessed domains with contacts
    (quality/country/limit filters, per-row 📋 copy email, 🔍 modal,
    CSV export, pagination, auto-refreshes every 3s)
  - Browse: "Hide assessed" checkbox filters out already-processed
    domains so you can focus on fresh targets
  - Poll cycle refreshes Leads tab when active

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/main.py

@@ -156,12 +156,15 @@ async def enriched(
     cms: str = Query(None),
     country: str = Query(None),
     kit_digital: Optional[bool] = Query(None),
+    ai_only: bool = Query(False),
+    lead_quality: str = Query(None),
     page: int = Query(1, ge=1),
     limit: int = Query(100, ge=1, le=1000),
 ):
     total, rows = await get_enriched(
         min_score=min_score, cms=cms, country=country,
-        kit_digital=kit_digital, page=page, limit=limit,
+        kit_digital=kit_digital, ai_only=ai_only, lead_quality=lead_quality,
+        page=page, limit=limit,
     )
     return {"page": page, "limit": limit, "total": total, "results": rows}
 
@@ -286,6 +289,52 @@ async def export_csv(
     )
 
 
+@app.get("/api/export/leads")
+async def export_leads_csv(lead_quality: str = Query(None), country: str = Query(None)):
+    import json as _json
+
+    async def generate():
+        yield "domain,lead_quality,score,best_contact_channel,best_contact_value,emails,phones,whatsapp,social,cms,ip_country,page_title,ai_pitch\n"
+        p = 1
+        while True:
+            _, rows = await get_enriched(ai_only=True, lead_quality=lead_quality,
+                                          country=country, page=p, limit=500)
+            if not rows:
+                break
+            for r in rows:
+                contacts = {}
+                try:
+                    contacts = _json.loads(r.get("contact_info") or "{}")
+                except Exception:
+                    pass
+                def esc(v):
+                    return f'"{str(v or "").replace(chr(34), chr(39))}"'
+                emails  = esc(";".join(contacts.get("emails",  [])[:3]))
+                phones  = esc(";".join(contacts.get("phones",  [])[:3]))
+                whatsapp = esc(";".join(contacts.get("whatsapp",[])[:2]))
+                social  = esc(";".join(contacts.get("social",  [])[:4]))
+                line = ",".join([
+                    esc(r.get("domain")),
+                    esc(r.get("ai_lead_quality")),
+                    esc(r.get("score")),
+                    esc(r.get("ai_contact_channel")),
+                    esc(r.get("ai_contact_value")),
+                    emails, phones, whatsapp, social,
+                    esc(r.get("cms")),
+                    esc(r.get("ip_country")),
+                    esc(r.get("page_title")),
+                    esc(r.get("ai_pitch")),
+                ])
+                yield line + "\n"
+            p += 1
+
+    qual = f"_{lead_quality.lower()}" if lead_quality else ""
+    return StreamingResponse(
+        generate(), media_type="text/csv",
+        headers={"Content-Disposition": f'attachment; filename="domgod_leads{qual}.csv"'},
+    )
+
+
 @app.post("/api/score/run")
 async def score_run():
     return await run_scoring()