Add mssql_dab show flow and improve tool descripiton

[caohai]

Description

Adds a show operation to mssql_dab so Copilot can open the Data API Builder tab for a connection, and aligns the DAB tool contract with the existing schema-designer pattern.

• Adds mssql_dab.show and wired it to open the DAB tab from a connectionId
• Aligned the DAB manifest/tool description with schema-designer and made enabledActions the canonical DAB change field

Code Changes Checklist

• New or updated unit tests added
• All existing tests pass (npm run test)
• Code follows contributing guidelines
• Telemetry/logging updated if relevant
• No regressions or UX breakage

Reviewers: Please read our reviewer guidelines

[Copilot]

Pull request overview

Adds a show flow to the mssql_dab Copilot tool so it can open the Data API Builder (DAB) view for a specified connection, and aligns the tool contract/schema with the schema-designer tool pattern.

Changes:

• Added mssql_dab.show operation (opens DAB view from a provided connectionId) and wired it through MainController.
• Updated DAB tool contract/schema + internal change shape (actions → enabledActions) and adjusted handler validation accordingly.
• Added/updated localization strings and unit tests to cover the new behavior and updated schema expectations.

Reviewed changes

Copilot reviewed 13 out of 13 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
localization/xliff/vscode-mssql.xlf	Adds new trans-units for DAB tool messaging (show success + error guidance).
extensions/mssql/l10n/bundle.l10n.json	Adds corresponding VS Code l10n bundle entries for new DAB strings.
extensions/mssql/src/constants/locConstants.ts	Introduces new localized strings used by mssql_dab show/error paths.
extensions/mssql/src/copilot/tools/dabTool.ts	Implements show operation, injects dependencies, and uses localized messages.
extensions/mssql/src/controllers/mainController.ts	Registers DabTool with required dependencies and adds openDabDesigner.
extensions/mssql/package.json	Updates mssql_dab tool manifest description and input schema (adds show, uses top-level object schema).
extensions/mssql/src/sharedInterfaces/dab.ts	Renames DAB change field to enabledActions for set_entity_actions.
extensions/mssql/src/reactviews/pages/SchemaDesigner/schemaDesignerRpcHandlers.ts	Updates DAB change application to validate/apply enabledActions; waits for initialization before serving state.
extensions/mssql/src/reactviews/pages/SchemaDesigner/schemaDesignerStateProvider.tsx	Exposes isInitializedRef + waitForInitialization on SchemaDesigner context.
extensions/mssql/src/reactviews/pages/SchemaDesigner/dab/dabContext.tsx	Passes initialization gating into DAB tool RPC handlers.
extensions/mssql/src/copilot/prompts.ts	Clarifies DAB prompt to reference “active schema designer” context.
extensions/mssql/test/unit/dabToolManifest.test.ts	Updates tests for new top-level schema shape and show/enabledActions changes.
extensions/mssql/test/unit/dabTool.test.ts	Adds unit coverage for show behavior and updated messages/field names.

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[github-actions]

PR Changes

Category	Target Branch	PR Branch	Difference
vscode-mssql VSIX	6402 KB	6402 KB	⚪ 0 KB ( 0% )
sql-database-projects VSIX	7060 KB	7025 KB	⚪ -35 KB ( 0% )
data-workspace VSIX	535 KB	535 KB	⚪ 0 KB ( 0% )

[codecov-commenter]

Codecov Report

❌ Patch coverage is 98.59155% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.69%. Comparing base (a6faae9) to head (7207ae6).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
...ges/SchemaDesigner/schemaDesignerStateProvider.tsx	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #21511      +/-   ##
==========================================
+ Coverage   72.54%   72.69%   +0.15%     
==========================================
  Files         330      330              
  Lines       98008    98120     +112     
  Branches     5438     5446       +8     
==========================================
+ Hits        71096    71326     +230     
+ Misses      26912    26794     -118     

Files with missing lines	Coverage Δ
extensions/mssql/src/constants/locConstants.ts	75.97% <100.00%> (+0.10%)	⬆️
extensions/mssql/src/controllers/mainController.ts	34.16% <100.00%> (+3.63%)	⬆️
extensions/mssql/src/copilot/prompts.ts	100.00% <100.00%> (ø)
extensions/mssql/src/copilot/tools/dabTool.ts	99.06% <100.00%> (+0.14%)	⬆️
.../pages/SchemaDesigner/schemaDesignerRpcHandlers.ts	83.17% <100.00%> (+0.87%)	⬆️
extensions/mssql/src/sharedInterfaces/dab.ts	97.59% <100.00%> (ø)
...ges/SchemaDesigner/schemaDesignerStateProvider.tsx	16.52% <50.00%> (+0.22%)	⬆️

... and 2 files with indirect coverage changes

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[Copilot]

Pull request overview

Copilot reviewed 14 out of 14 changed files in this pull request and generated no new comments.

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