fix: resolve 158/183 credo --strict warnings
- Add 17 missing @spec annotations (layouts, error_json, error_html, skewt_svg)
- Move 12+ nested alias/import/require to module top level
- Add phx-change/id attributes to 11 raw HTML <form> tags
- Remove 4 unused LiveView assigns (:bounds, :data_provider)
- Add 3 missing doctest references (HrrrNativeClient, BulkFetch, Accounts)
- Break 2 long lines (path_compute.ex:382)
- Strengthen weak test assertions (is_binary→byte_size, is_list→!=[])
- Replace Module.concat with Module.safe_concat (2 occurrences)
- Replace length/1 > 0 with list != [] (9 occurrences)
- Remove no-op assert true, fix no-assertion tests
Remaining: 24 socket.assigns introspection warnings (deliberate test
pattern for observable behavior testing), 1 formatter-resistant long
line, 3 app-code usage warnings.
Graham McIntire
cb8445f329