fix: prevent serverIp from being overwritten on every user registration

[nizepart]

Fixes #4215

Summary

• Add !isAdminPresent guard to the updateWebServerSettings({ serverIp }) call in databaseHooks.user.create.after so the public IP is only auto-set during the very first admin registration, not on every subsequent user creation.

Changes

- if (!IS_CLOUD) {
+ if (!IS_CLOUD && !isAdminPresent) {
      await updateWebServerSettings({
          serverIp: await getPublicIpWithFallback(),
      });
  }

isAdminPresent is already queried in the same scope (checks if an owner role exists in the member table). On first setup no owner exists yet, so the IP is auto-detected as before. On all subsequent user creations an owner already exists, so the block is skipped and the stored IP is preserved.

Impact

• 1 line changed, 1 file -- minimal, safe diff.
• No effect on the manual "Update Server IP" dialog -- admins can still change the IP at any time.
• No effect on license validation -- it calls getPublicIpWithFallback() directly without writing to webServerSettings.
• No effect on cloud deployments -- the IS_CLOUD guard already skips this code path.

Greptile Summary

This PR adds a !isAdminPresent guard to the updateWebServerSettings({ serverIp }) call in the databaseHooks.user.create.after handler so the server IP is only auto-detected during the very first admin registration rather than on every subsequent user creation. The fix is minimal and correct — isAdminPresent is already queried at the top of the after hook (line 195) before the member insert transaction, so it accurately reflects whether an owner already exists at the time each user is created.

Confidence Score: 5/5

Safe to merge — one-line guard change with correct logic and no side effects on other code paths.

The fix is logically sound: isAdminPresent is queried before the owner member record is inserted, so it's null on first-admin setup and truthy thereafter. All guarded code paths (IS_CLOUD, manual IP update, license validation) are unaffected. No P0 or P1 findings.

No files require special attention.

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