[paulirwin]

Closes #91.

Adds an Indexes page to the dashboard (/browse, linked from the header between Status and Search) and a page per index (/browse/{name}). Everything goes through the Azure SDK, like the Search page.

The pages live under /browse because /indexes and /indexes/{name} are the API's own routes.

What the pages show

• Index list: each index with its document count, size on disk, key field, and the optional features it uses (scoring profiles, suggesters, semantic, vector), with links to its page and to Search.
• Fields tab: every field and its attributes (retrievable, searchable, filterable, sortable, facetable, analyzer or vector dimensions). Subfields of complex fields are indented under their parent. Below the table: scoring profiles, suggesters, semantic configurations, vector profiles and CORS.
• Documents tab: steps through documents one at a time (first / previous / next / last, or jump to a number), or looks one up by key. Each document has a JSON view. If the key field is sortable, documents come in key order. The tab and position are kept in the address bar.
• Definition tab: the raw JSON the emulator returns for the index.

Emulator changes

• New: GET /indexes/{name}/stats (SearchIndexClient.GetIndexStatisticsAsync). Returns documentCount, storageSize and vectorIndexSize.
  • storageSize is the combined size of the index's files, so it isn't comparable to Azure's figure.
  • vectorIndexSize is always 0, because vectors are stored in the same files.
  • The endpoint takes an index name, not an alias.
• Fixed: GetIndexesAsync failed on any index with scoring-profile text weights. The listing used OData's serializer, which wrote the weights as [{}] and left out semantic configurations and other unmodelled properties. It now uses the same JSON as GET /indexes/{name}, with $select applied by hand. ListEndpoint_DoesNotYetIncludeUnmodelledProperties, which documented the old gap, is now ListEndpoint_IncludesTheFullDefinition.
• Fixed: search=* returned 400 on an index with no searchable fields. A wildcard now matches every document, as in Azure.

Dashboard fixes

• Selected tab on the Search page never showed as selected. Blazor renders a true bool attribute as aria-selected="", which neither the CSS nor screen readers treat as selected. aria-busy had the same problem. Both are now written as "true"/"false".
• Shared error helper. The Search page's error-envelope parsing moved to Dashboard/ErrorEnvelope.cs so both pages show the emulator's message rather than the SDK's full exception dump.

Tests

• Unit: field-table flattening, document JSON extraction, byte formatting, storage measurement, and a wildcard search on an index with no searchable fields.
• Integration: the new routes (and that GET /indexes still answers with JSON), GetIndexesAsync returning full definitions, and GetIndexStatisticsAsync before and after uploading documents.
• All suites pass locally: 1,106 unit, 253 integration, 8 Aspire.

🤖 Generated with Claude Code