doc: add todos for missing doc

docs/guide/funding-sources-table.md

@@ -57,6 +57,8 @@ Below is a side-by-side comparison of Lightning funding sources you can use with
 | **LN.tips**                    | Custodial/Self-Custodial | Depends on provider | Medium                         | ❌                        | Low               | Provider-managed         | Moderate          | Low                    | Transaction fees may apply                   | Medium          | Simple hosted service; use LN.tips API as your backend.                                    |
 | **Fake Wallet**                | Testing (simulated)      | ❌                  | Low                            | ❌                        | N/A               | N/A                      | Easy              | Low                    | None (test only)                             | N/A             | For testing only; mints accounting units in LNbits (no real sats, unit name configurable). |
 
+
+TODO: add Spark
 ---
 
 ### Notes for readers

docs/guide/wallets.md

@@ -52,7 +52,7 @@ A backend wallet is selected and configured entirely through LNbits environment
 
 ### CLNRest (using [runes](https://docs.corelightning.org/reference/lightning-createrune))
 
-[Core Lightning REST API docs](https://docs.corelightning.org/docs/rest)  
+[Core Lightning REST API docs](https://docs.corelightning.org/docs/rest)
 Should also work with the [Rust version of CLNRest](https://github.com/daywalker90/clnrest-rs)
 
 **Environment variables**
@@ -338,6 +338,8 @@ Configure in the admin UI or via env vars:
 
 <a id="strike"></a>
 
+## TODO: add Spark
+
 ## Strike (alpha)
 
 Custodial provider integrated via **Strike OAuth Connect** (OAuth 2.0 / OIDC). Authenticate a Strike user in your app, then call Strike APIs on the user’s behalf once scopes are granted. Requires a Strike business account, registered OAuth client, minimal scopes, and login/logout redirect URLs.