phase-1: scaffold platform foundation structure and architecture governance

docs/architecture/foundation/Service-Standards.md

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+# Service Standards
+
+Status: Mandatory
+Date: 2026-07-03
+
+## Service Categories
+
+- Domain Service: business operations and rules.
+- Integration Service: external API/system communication.
+- Platform Service: cross-cutting platform concerns.
+
+## Rules
+
+- Services must have one clear responsibility.
+- Services should expose typed contracts only.
+- Services should avoid UI-specific formatting.
+- Services should not depend on component classes.
+- Shared services must not depend on feature modules.
+
+## Facade Interaction
+
+- Components call facades.
+- Facades call services.
+- Services do not call UI components.
+
+## Stable Module Protection
+
+- Existing authentication, payment, authorization services remain behavior-compatible.
+- Wrap legacy stable behavior with adapters where needed.
+- No contract changes for auth/payment APIs.
+
+## Storage and Runtime Access
+
+- Browser storage access allowed only in approved service boundaries.
+- Prefer abstraction interfaces for storage access.
+- Never use storage APIs in UI components.