Added test and small fixes

main.py

@@ -10,7 +10,9 @@ from fastapi.templating import Jinja2Templates
 
 import config
 import db
+import sftp as sftp_module
 import sync
+import uploader
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s — %(message)s")
 log = logging.getLogger(__name__)
@@ -94,10 +96,11 @@ async def books_page(request: Request, page: int = 1):
 @app.get("/settings", response_class=HTMLResponse)
 async def settings_page(request: Request):
     s = db.get_all_settings()
-    has_key = bool(s.get("sftp_key", "").strip())
+    key_pem = s.get("sftp_key", "")
     return templates.TemplateResponse(request, "settings.html", {
         "s": s,
-        "has_key": has_key,
+        "has_key": bool(key_pem.strip()),
+        "key_fingerprint": sftp_module.get_key_fingerprint(key_pem),
     })
 
 
@@ -155,6 +158,22 @@ async def trigger_test_sync(background_tasks: BackgroundTasks):
     return RedirectResponse("/?test_started=1", status_code=303)
 
 
+# --- Connection tests ---
+
+@app.get("/api/test/ssh")
+async def test_ssh():
+    cfg = config.load()
+    ok, message = sftp_module.test_connection(cfg.sftp)
+    return {"ok": ok, "message": message}
+
+
+@app.get("/api/test/calibre")
+async def test_calibre():
+    cfg = config.load()
+    ok, message = uploader.test_connection(cfg.calibre)
+    return {"ok": ok, "message": message}
+
+
 # --- JSON status API ---
 
 @app.get("/api/status")