chore: apply gofmt fixes

[marcus]

Summary

• apply gofmt to the existing formatting backlog reported by gofmt -l .
• keep the branch scoped to formatter-only changes across the touched Go files
• leave repo behavior unchanged beyond import/order/spacing cleanup

Verification

• gofmt -l .
• go vet ./...
• go test ./cmd ./internal/db ./internal/query ./internal/serve ./internal/serverdb ./internal/session ./internal/syncclient ./internal/version ./internal/workdir ./pkg/monitor ./pkg/monitor/keymap ./test/e2e ./test/syncharness
• go test ./...

Notes

• the previously noted internal/sync failure did not reproduce on this branch; full repo tests passed during verification.

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