m hit a cluster of three bugs on /projects/{id}/submissions:
1. 500 on /api/projects/{id}/partner-units — DerivationService.AttachedUnit
scanned derive_unit_roles (text[]) into a plain []string. sqlx returns
[]uint8 for array columns without an adapter. Swap to pq.StringArray
(same shape as the other array-scanned types in the codebase).
2. 404 on /projects/{id}/submissions — every other project-tab path
(history, deadlines, team, checklists, …) is registered in handlers.go
routing all to handleProjectsDetailPage so deep links work, but the
submissions tab added in t-paliad-230 never got the matching route.
Result: m navigates to the share-able URL and gets the 404 chrome.
Add the missing route entry.
3. Create / update project rejected by projekte_client_number_check —
the CHECK is `client_number IS NULL OR matches '^[0-9]{6}$'`, but the
form sends empty string "" for an unset field. The Create path passed
`*input.ClientNumber` raw; the Update path's appendSetSkippable did
the same. Both now route through a new nullableTrimmed helper that
coerces empty/whitespace to nil → SQL NULL → constraint accepts.
matter_number gets the same treatment for symmetry.
Verified the SQL by EXPLAIN against the live DB on the today-filter
hotfix (becf4f0). These three fixes only change Go-side type / nil-
coercion, so no SQL-syntax exposure.
mAi
65308651dd