Add admin panel, WebSocket support, and API versioning

Introduce an admin portal (React + Nginx), WebSocket routing, and
API versioning middleware with `/api/v1/` prefix deprecation.
Add master API key authentication, new Prometheus metrics for AI
token consumption and active WebSockets, and extend S3 config
with a public endpoint URL. Update test paths and fixtures to
align with the new routing structure.

app/routers/ai.py

@@ -14,6 +14,7 @@ from app.services.scraper import fetch_page_content
 from app.services.ai_vision import summarize_url, draft_task
 from app.config import settings
 from app.middleware import limiter
+from app.metrics import hub_ai_tokens_consumed
 
 
 router = APIRouter(prefix="/ai", tags=["Intelligence Artificielle"])
@@ -62,7 +63,7 @@ async def summarize_link(
         language=body.language,
     )
 
-    return SummarizeResponse(
+    resp = SummarizeResponse(
         url=body.url,
         title=page.get("title"),
         summary=result["summary"],
@@ -70,6 +71,13 @@ async def summarize_link(
         model=result["model"],
     )
 
+    # Metrics
+    if result.get("prompt_tokens") or result.get("output_tokens"):
+        total = (result.get("prompt_tokens") or 0) + (result.get("output_tokens") or 0)
+        hub_ai_tokens_consumed.labels(client_id=client.id, model=result["model"]).inc(total)
+
+    return resp
+
 
 @router.post(
     "/draft-task",
@@ -99,4 +107,9 @@ async def generate_task(
     if not result.get("title"):
         raise HTTPException(status_code=500, detail="Échec de la génération de la tâche")
 
+    # Metrics
+    if result.get("prompt_tokens") or result.get("output_tokens"):
+        total = (result.get("prompt_tokens") or 0) + (result.get("output_tokens") or 0)
+        hub_ai_tokens_consumed.labels(client_id=client.id, model=result.get("model", "unknown")).inc(total)
+
     return DraftTaskResponse(**result)