Complete sitemap, Garrett's 5 Planes applied, and annotated user flow diagrams for every critical path — booking, estimate request, service portal, and parts.
Framework: Jesse James Garrett — "The Elements of User Experience," 2002. UX-FOUNDATIONS.md § 2.1–2.6
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Double Diamond process: Flows designed to minimize friction, maximize trust, and align with JTBD success criteria. UX-FOUNDATIONS.md § 3.1