- Add formatResultEntryForBase + update Equals/Mod/ChangeSign so committed results
format in the active display base (e.g. HEX shows "C8", "1B0" not decimal).
- Robust per-line centering for dynamic A-F hexRow and keypad rows under display
(prevents split key borders/decorations on bottom row).
- Updated test expectation for HEX result digits.
- Enables validated cross-base flow: DEC entry, Tab to HEX, continue op, see
result in active base, Tab back converts displayed value correctly.
- style: gofmt -s all touched sources (ui_test.go, version_test.go etc.).
- ci: add lint and cross targets to Makefile.
- cross produces the 6 platform binaries expected by release.yml on v* tags.
- lint target for local parity (CI continues to use golangci-lint-action).
This is the v0.3.0 release-ready state (user-validated: 100 DEC -> Tab HEX +64 = C8 -> Tab DEC 200).
- Expanded calc_test.go with additional cases for decimal point, backspace, sign change, mod, div0, multi-step ops, negatives, format, is-integer with entry, etc. (calc coverage to ~86%)
- New ui_test.go: unit tests for App (New, Update key sequences for digits/ops/MOD/HEX entry/base cycle/CERR/clears/flashes/pressed state, View contains checks). ui coverage ~82%
- New version_test.go: 100% for String()
- All tests pass (go test ./...); total project coverage ~81%
- Complements the HEX entry and UI polish work.
- Uses table-friendly and direct model testing suitable for the Bubble Tea spike.
