[MM-66711] Verify push notifications on magic link login

[larkox]

Summary

When we login normally, we check the push notifications during the add a server flow.

On magic link, we are omitting that step, so we need to do the check afterwards.

Ticket Link

Fix https://mattermost.atlassian.net/browse/MM-66711

Release Note

No release note needed since it will be out in the same release as the feature

NONE

[Copilot]

Pull request overview

Adds push notification capability verification for magic link login flow to match the behavior of normal login. This ensures push notifications are properly enabled after authentication via magic link, similar to how they're verified during the standard add-a-server flow.

• Added push notification check after successful magic link authentication
• Calls doPing to verify server push notification capabilities
• Shows push notification prompts if needed using the user's locale

---

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[Copilot]

[nitpick] The multiple undefined parameters make the function call unclear. Consider using named parameters or an options object for doPing, or add comments explaining what each parameter represents.

Suggested change

	const pingResult = await doPing(serverUrlToUse, true, undefined, undefined, client);
	const pingResult = await doPing(
	serverUrlToUse, // serverUrl
	true, // isMobile
	undefined, // token
	undefined, // deviceId
	client, // client
	);

[fmartingr]

👍

[github-actions]

Coverage Comparison Report

Generated on December 12, 2025 at 16:12:44 UTC

+-----------------+------------+------------+-----------+
| Metric          | Main       | This PR    | Diff      |
+-----------------+------------+------------+-----------+
| Lines           |     86.18% |     86.16% |    -0.02% |
| Statements      |     86.06% |     86.04% |    -0.02% |
| Branches        |     72.61% |     72.59% |    -0.02% |
| Functions       |     85.40% |     85.40% |     0.00% |
+-----------------+------------+------------+-----------+
| Total           |     82.56% |     82.54% |    -0.02% |
+-----------------+------------+------------+-----------+

[lindalumitchell]

@larkox I'm having trouble with this one, on both iOS and Android. Here's what I'm doing:

1. Install the PR build of the app on mobile device, close the app
2. Have another user send me a magic link invitation
3. Open the invitation email on mobile and tap the link to join the server
4. Select to open in the app

Observed: A brief Mattermost logo loading screen, but then it disappears and nothing else loads on the screen. It is completely blank.
Expected: I join the server and I'm logged in and viewing it

[larkox]

@lindalumitchell I added something that was missing to the PR to actually work, but it is completely unrelated to the issue you were facing :(