v2: source Teller app id from link-session endpoint#1114
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Teller Connect was bootstrapped from `window.__TELLER_APP_ID__`, but nothing sets that global — every Teller connect attempt fell through to the "application id not configured" toast. Flip Teller's `needsLinkSession` to true so the existing handler returns the server-configured app id as `link_token` (the Teller provider's `CreateLinkSession` already does this), and read it in the connect sheet the same way Plaid reads its link token. Note: the reauth sheet still reads the unset window global; that's a separate follow-up. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
web/src/features/connections/connect-bank-sheet.tsxwas reading the Teller application id fromwindow.__TELLER_APP_ID__, but nothing in the codebase sets that global — every Teller connect attempt fell through to the "application id not configured" toast.Follow-up
`web/src/features/connections/reauth-sheet.tsx:158` still reads the unset window global for the Teller reauth flow. Same bug, different sheet — leaving it for a separate PR since the reauth path's `session.link_token` carries the enrollment id rather than the app id and needs a second source.
Test plan
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