feat(sync): add SSE live feed, unified logs page, fix Oracle connection

- Add SSE event bus in sync_service (subscribe/unsubscribe/_emit)
- Add GET /api/sync/stream SSE endpoint for real-time sync progress
- Rewrite logs.html: unified runs table + live feed + summary + filters
- Rewrite logs.js: SSE EventSource client, run selection, pagination
- Dashboard: clickable runs navigate to /logs?run=, sync started banner
- Remove "Import Comenzi" nav item, delete sync_detail.html
- Add error_message column to sync_runs table with migration
- Fix: export TNS_ADMIN as OS env var so oracledb finds tnsnames.ora
- Fix: use get_oracle_connection() instead of direct pool.acquire()
- Fix: CRM_POLITICI_PRET_ART INSERT to match actual table schema

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

api/app/routers/sync.py

@@ -1,6 +1,10 @@
+import asyncio
+import json
+
 from fastapi import APIRouter, Request, BackgroundTasks
 from fastapi.templating import Jinja2Templates
 from fastapi.responses import HTMLResponse
+from starlette.responses import StreamingResponse
 from pydantic import BaseModel
 from pathlib import Path
 from typing import Optional
@@ -16,27 +20,46 @@ class ScheduleConfig(BaseModel):
     interval_minutes: int = 5
 
 
-# HTML pages
-@router.get("/sync", response_class=HTMLResponse)
-async def sync_page(request: Request):
-    return templates.TemplateResponse("dashboard.html", {"request": request})
+# SSE streaming endpoint
+@router.get("/api/sync/stream")
+async def sync_stream(request: Request):
+    """SSE stream for real-time sync progress."""
+    q = sync_service.subscribe()
 
+    async def event_generator():
+        try:
+            while True:
+                # Check if client disconnected
+                if await request.is_disconnected():
+                    break
+                try:
+                    event = await asyncio.wait_for(q.get(), timeout=15.0)
+                    yield f"data: {json.dumps(event)}\n\n"
+                    if event.get("type") in ("completed", "failed"):
+                        break
+                except asyncio.TimeoutError:
+                    yield f"data: {json.dumps({'type': 'keepalive'})}\n\n"
+        finally:
+            sync_service.unsubscribe(q)
 
-@router.get("/sync/run/{run_id}", response_class=HTMLResponse)
-async def sync_detail_page(request: Request, run_id: str):
-    return templates.TemplateResponse("sync_detail.html", {"request": request, "run_id": run_id})
+    return StreamingResponse(
+        event_generator(),
+        media_type="text/event-stream",
+        headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no"}
+    )
 
 
 # API endpoints
 @router.post("/api/sync/start")
 async def start_sync(background_tasks: BackgroundTasks):
     """Trigger a sync run in the background."""
-    status = await sync_service.get_sync_status()
-    if status.get("status") == "running":
-        return {"error": "Sync already running", "run_id": status.get("run_id")}
+    result = await sync_service.prepare_sync()
+    if result.get("error"):
+        return {"error": result["error"], "run_id": result.get("run_id")}
 
-    background_tasks.add_task(sync_service.run_sync)
-    return {"message": "Sync started"}
+    run_id = result["run_id"]
+    background_tasks.add_task(sync_service.run_sync, run_id=run_id)
+    return {"message": "Sync started", "run_id": run_id}
 
 
 @router.post("/api/sync/stop")
@@ -61,8 +84,8 @@ async def sync_history(page: int = 1, per_page: int = 20):
 
 
 @router.get("/logs", response_class=HTMLResponse)
-async def logs_page(request: Request):
-    return templates.TemplateResponse("logs.html", {"request": request})
+async def logs_page(request: Request, run: str = None):
+    return templates.TemplateResponse("logs.html", {"request": request, "selected_run": run or ""})
 
 
 @router.get("/api/sync/run/{run_id}")