Add local collections support with GUI, CLI, and publishing workflow

Features:
- Local collection definitions stored in ~/.cmdforge/collections/
- CLI commands: create, show, add, remove, delete, publish, status
- GUI Collections page with local and registry tabs
- Collection publishing with tool resolution and visibility checks
- New API endpoints: GET /api/v1/me, GET /api/v1/tools/.../approved,
  POST /api/v1/collections
- RegistryClient methods: get_me(), has_approved_public_tool(),
  publish_collection()

Implementation:
- collection.py: Collection dataclass, resolve_tool_references(),
  classify_tool_reference(), ToolResolutionResult
- collections_page.py: GUI with background workers for install/publish
- collections_commands.py: Full CLI command implementations
- registry/app.py: New authenticated endpoints with validation

Tests:
- test_collection.py: 27 unit tests for collection module
- test_collection_api.py: 20 tests (8 client, 12 API with Flask skip)

Documentation updated: README, CHANGELOG, CLAUDE.md, tests/README

Co-Authored-By: Claude Opus 4.5 <[email protected]>

tests/README.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-The test suite covers the core CmdForge modules with **158 unit tests** organized into four main test files:
+The test suite covers the core CmdForge modules with **205 unit tests** organized into test files:
 
 | Test File | Module Tested | Test Count | Description |
 |-----------|---------------|------------|-------------|
@@ -10,6 +10,8 @@ The test suite covers the core CmdForge modules with **158 unit tests** organize
 | `test_runner.py` | `runner.py` | 31 | Variable substitution, step execution |
 | `test_providers.py` | `providers.py` | 35 | Provider management, AI calls |
 | `test_cli.py` | `cli/` | 20 | CLI commands and arguments |
+| `test_collection.py` | `collection.py` | 27 | Collection CRUD, tool resolution |
+| `test_collection_api.py` | Registry API | 20 | Collection API endpoints, client methods |
 | `test_registry_integration.py` | Registry | 37 | Registry client, resolution (12 require server) |
 
 ## Running Tests
@@ -73,6 +75,30 @@ pytest tests/ --cov=cmdforge --cov-report=html
 - `TestRefreshCommand` - Regenerate wrapper scripts
 - `TestDocsCommand` - View/edit documentation
 
+**test_collection.py** - Collection management
+- `TestCollection` - Collection dataclass and CRUD operations
+  - Create, save, load, delete collections
+  - Registry URL generation
+  - YAML serialization roundtrip
+- `TestListCollections` - List local collections
+- `TestGetCollection` - Get collection by name
+- `TestClassifyToolReference` - Classify local vs registry tool refs
+- `TestResolveToolReferences` - Transform tool refs for publishing
+  - Local tool name expansion (name → user/name)
+  - Visibility issue detection
+  - Registry tool validation
+  - Pinned version transformation
+- `TestToolResolutionResult` - Resolution result dataclass
+
+**test_collection_api.py** - Collection API and client
+- `TestGetMeEndpoint` - GET /api/v1/me endpoint (requires Flask)
+- `TestToolApprovedEndpoint` - GET /api/v1/tools/.../approved (requires Flask)
+- `TestPostCollectionsEndpoint` - POST /api/v1/collections (requires Flask)
+- `TestRegistryClientMethods` - Client methods with mocked requests
+  - `get_me()` - Get authenticated user info
+  - `has_approved_public_tool()` - Check tool approval status
+  - `publish_collection()` - Publish collection to registry
+
 ### Integration Tests (require running server)
 
 **test_registry_integration.py** - Registry API tests (marked with `@pytest.mark.integration`)