Auto-start collectors when saving machines

backend/README.md

@@ -126,8 +126,9 @@ docker compose up --build
 2. After the API is running, open the app, go to **Settings**, and add machine entries:
    - **Local**: monitors the API host itself without SSH.
    - **SSH**: monitors another machine using a host, username, and a private key pasted directly into the machine settings, with an optional passphrase.
-   - The machine editor groups Connection, Monitoring / Files, Jellyfin, and Jellyseerr settings under separate headings so each service area is easier to scan.
-   - Saving an SSH machine now validates the banner/auth flow and records the first trusted host key into the backend-managed `known_hosts` file, surfacing any errors if the host cannot be reached or authenticated.
+   - The machine editor groups Connection, Monitoring / Files, Jellyfin, Jellyseerr, and Notes under separate headings so each service area is easier to scan.
+   - Saving a monitoring machine now validates the banner/auth flow, records the first trusted host key into the backend-managed `known_hosts` file, and starts the collector so charts populate without a separate manual step.
+   - If the host cannot be reached or authenticated, the save flow surfaces the SSH error directly in the dialog.
    - Use **Validate SSH + trust host** in the machine editor before saving if you want to test the banner/auth flow explicitly.
    - The first successful SSH connection uses trust-on-first-use: the backend records that machine's host key into its managed `known_hosts` file automatically, then continues verifying it strictly on later connects.
 

backend/src/media_library_viewer_api/routers/settings.py

@@ -12,6 +12,7 @@ from pydantic import BaseModel, Field
 from media_library_viewer_api.clients.ssh import RemoteSSHClient
 from media_library_viewer_api.config import get_settings
 from media_library_viewer_api.dependencies import get_monitoring_poller, get_settings_store
+from media_library_viewer_api.services.monitoring_actions import start_collector
 from media_library_viewer_api.services.db_maintenance import remove_sqlite_database
 from media_library_viewer_api.services.known_hosts import has_known_host
 from media_library_viewer_api.services.media_index import MediaIndex
@@ -124,6 +125,12 @@ def _validate_saved_machine_ssh(machine: MonitoringMachineInput, store: Settings
         client.close()
 
 
+def _start_machine_collector(machine: MonitoringMachineInput, store: SettingsStore) -> None:
+    if "monitoring" not in {str(service).strip().lower() for service in machine.services}:
+        return
+    start_collector(machine.model_dump(exclude_none=True), store)
+
+
 @router.post("/machines/test-ssh")
 def test_machine_ssh(
     machine: MonitoringMachineInput,
@@ -183,7 +190,9 @@ def post_machine(
     saved = store.upsert_machine(machine.model_dump(exclude_none=True), machine.id)
     poller = get_monitoring_poller()
     try:
-        _validate_saved_machine_ssh(MonitoringMachineInput.model_validate(saved), store)
+        saved_machine = MonitoringMachineInput.model_validate(saved)
+        _validate_saved_machine_ssh(saved_machine, store)
+        _start_machine_collector(saved_machine, store)
     finally:
         poller.start()
         poller.kick()
@@ -201,7 +210,9 @@ def put_machine(
     saved = store.upsert_machine(machine.model_dump(exclude_none=True), machine_id)
     poller = get_monitoring_poller()
     try:
-        _validate_saved_machine_ssh(MonitoringMachineInput.model_validate(saved), store)
+        saved_machine = MonitoringMachineInput.model_validate(saved)
+        _validate_saved_machine_ssh(saved_machine, store)
+        _start_machine_collector(saved_machine, store)
     finally:
         poller.start()
         poller.kick()