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ss-tools/specs/001-unify-frontend-style/research.md

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Research: Frontend Style Unification

Decision 1: Tailwind-first unification through shared primitives and layout patterns

Decision: Use existing shared UI components and route-level layout patterns as the primary unification mechanism, with Tailwind utility classes as the style source of truth.

Rationale:

  • Aligns with constitution requirement: Tailwind-first and minimal scoped styles.
  • Reduces risk versus page-by-page ad-hoc class rewrites.
  • Enables predictable rollout and easier review by centralizing style behavior.

Alternatives considered:

  • Big-bang rewrite of all pages in one pass (rejected: high regression risk).
  • Introducing a second styling abstraction layer (rejected: added complexity and drift).

Decision 2: Incremental conformance with explicit exception registry

Decision: Apply style unification incrementally across core routes; for non-conformant legacy widgets, use documented fallback styles and track exceptions for follow-up.

Rationale:

  • Preserves functional behavior while raising consistency quickly.
  • Supports FR-005/FR-006 in spec by preventing disruption of critical flows.
  • Makes scope and technical debt explicit.

Alternatives considered:

  • Block release until 100% conformance (rejected: delays value delivery).
  • Ignore non-conformant areas (rejected: no governance and unresolved inconsistency).

Decision 3: Canonical UX state patterns for loading/empty/error/success

Decision: Define one reusable state pattern per state type (layout placement, message format, recovery action position) and apply to targeted modules.

Rationale:

  • Directly supports UX reference and SC-003.
  • Improves predictability and user trust.
  • Simplifies QA with deterministic state contracts.

Alternatives considered:

  • Module-specific state designs (rejected: reintroduces inconsistency).
  • Visual-only alignment without message/rule alignment (rejected: incomplete UX consistency).

Decision 4: i18n and terminology normalization as part of style work

Decision: Include text tone/terminology consistency in scope for user-facing state and action labels; avoid hardcoded strings during updates.

Rationale:

  • Required by constitution i18n rule.
  • Prevents mixed terms after visual unification.
  • Supports FR-007 and UX tone requirements.

Alternatives considered:

  • Deferring terminology to a separate feature (rejected: causes visible inconsistency after style updates).

Decision 5: Accessibility-preserving visual alignment

Decision: Keep focus visibility and readable contrast as non-negotiable constraints; when style and accessibility conflict, accessibility wins.

Rationale:

  • Matches edge-case requirements in spec.
  • Reduces user risk and supports sustainable UI governance.
  • Prevents regressions masked by purely visual approvals.

Alternatives considered:

  • Prioritizing strict visual sameness in all cases (rejected: can degrade accessibility outcomes).

Decision 6: Verification model = conformance checklist + route smoke tests + UX state checks

Decision: Validate through structured cross-route conformance checks, independent user-story tests, and targeted UX state verification.

Rationale:

  • Produces measurable evidence for SC-001..SC-005.
  • Aligns with independent testability principle in constitution.
  • Keeps verification technology-agnostic at feature level while staying executable in project context.

Alternatives considered:

  • Pure visual review without scenario checks (rejected: misses behavior regressions).
  • Full end-to-end redesign QA cycle before incremental rollout (rejected: too heavy for initial unification phase).