Fix: Ensure full Slack connector configuration is saved

I've modified `useConnectorEditPage.ts` to correctly save all Slack connector settings.

- I updated `editConnectorSchema` in `types.ts` to include a `config` field in `EditConnectorFormValues`.
- I replaced the `handleSaveChanges` function in `useConnectorEditPage.ts` with a version that reads the complete Slack configuration from `formData.config` (populated by `EditSlackConnectorConfigForm` and channel selection).
- This ensures that settings like `slack_selected_channel_ids`, `slack_membership_filter_type`, and other Slack-specific options are included in the payload to the backend and persisted correctly.
- I updated post-save logic to correctly reset the form's `config` field for Slack connectors.

This addresses the issue where changes to Slack connector configurations, other than just the bot token, were not being saved.

surfsense_web/components/editConnector/types.ts

@@ -31,5 +31,6 @@ export const editConnectorSchema = z.object({
     TAVILY_API_KEY: z.string().optional(),
     LINEAR_API_KEY: z.string().optional(),
     LINKUP_API_KEY: z.string().optional(),
+    config: z.record(z.string(), z.any()).optional(), // Added for generic config object
 });
 export type EditConnectorFormValues = z.infer<typeof editConnectorSchema>;