test(explore): add awsConfig + cfnStackModel model tests; archive change

Add ported model tests completing task 3.5:
- awsConfig.test.ts: profile listing, region resolution (file + AWS_REGION
  precedence), endpoint_url surfacing, missing-file fallback
- cfnStackModel.test.ts: stack-resource -> Focus conversion, same-type
  grouping, and the per-resource skip/warn behavior (covers the
  previously-fatal missing-ResourceType case)

Sync the change's delta specs into openspec/specs/ (focus-model,
localstack-explorer-view, localstack-metamodel, resource-browser) and
archive the completed integrate-resource-browsers change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: peter-smith-phd

…tegrate-resource-browsers/.openspec.yaml …tegrate-resource-browsers/.openspec.yamlopenspec/changes/integrate-resource-browsers/.openspec.yaml renamed to openspec/changes/archive/2026-06-23-integrate-resource-browsers/.openspec.yaml openspec/changes/integrate-resource-browsers/.openspec.yaml renamed to openspec/changes/archive/2026-06-23-integrate-resource-browsers/.openspec.yaml

@@ -0,0 +1,52 @@
+# focus-model Specification
+
+## Purpose
+TBD - created by archiving change integrate-resource-browsers. Update Purpose after archive.
+## Requirements
+### Requirement: Focus data structure
+
+The system SHALL represent a "focus" as a hierarchical structure of profiles → regions → services → resource types → ARNs. A focus SHALL carry a `version` string and a list of profiles; each profile SHALL have an `id` and a list of regions; each region SHALL have an `id` and a list of services; each service SHALL have an `id` and a list of resource types; each resource type SHALL have an `id` and a list of ARN strings. The structure SHALL be validated against a schema before use.
+
+#### Scenario: Valid focus is accepted
+
+- **WHEN** a focus object matching the schema (version, profiles, regions, services, resource types, arns) is parsed
+- **THEN** parsing succeeds and the typed focus object is returned
+
+#### Scenario: Malformed focus is rejected
+
+- **WHEN** a focus object missing required fields or with mistyped fields is parsed
+- **THEN** parsing fails with a descriptive validation error and no focus is returned
+
+### Requirement: Wildcard and default selectors
+
+The system SHALL support wildcard (`*`) selectors for profiles, regions, services, resource types, and ARNs, and a `default` selector for regions. A wildcard at a level SHALL mean "expand dynamically to all available items at that level when rendered"; a `default` region SHALL mean "the profile's configured default region". Non-wildcard ids SHALL be used literally.
+
+#### Scenario: Wildcard service expands to all supported services
+
+- **WHEN** a region's services list contains exactly one service with id `*`
+- **THEN** consumers SHALL expand it to every supported service provider, each with wildcard resource types and ARNs
+
+#### Scenario: Default region resolves to the profile's configured region
+
+- **WHEN** a profile's regions list contains exactly one region with id `default`
+- **THEN** consumers SHALL resolve it to the region configured for that profile, or surface an error if none is configured
+
+#### Scenario: Wildcard ARN triggers live listing
+
+- **WHEN** a resource type's arns list is exactly `["*"]`
+- **THEN** consumers SHALL list the actual ARNs from the platform rather than using literal values
+
+### Requirement: Merging multiple focuses
+
+The system SHALL merge a set of selected focuses into a single focus such that the union of all selected profiles/regions/services/resource types/ARNs is represented, with duplicate ids collapsed and child lists combined. Merging an empty set SHALL yield no focus.
+
+#### Scenario: Two focuses on the same profile and region are unioned
+
+- **WHEN** two focuses each select the same profile and region but different services are merged
+- **THEN** the result contains that single profile and region with both services present
+
+#### Scenario: Merging an empty selection yields nothing
+
+- **WHEN** an empty set of focuses is merged
+- **THEN** the result is undefined and the Resources view shows its empty-state placeholder
+