Changelog

Implements aggregate_query_grouped in the dataset store which generates

GROUP BY x_column, group_column SQL and returns (x, group, y) triples.

The FFI layer pivots these triples into a GroupedAggregateQueryResponse

with shared x_labels and per-series value arrays, ready for multi-series

chart rendering on the C# side.

Introduces GroupedAggregateQuery, AggregateSeriesResult, and GroupedAggregateResult

records to the SDK dataset models. Adds AggregateGroupedAsync method to both

IDatasetService and IDataObjectProvider interfaces, enabling plugins to request

multi-series chart data where a group_column produces separate value series sharing

a common x-axis. Bumps SDK version from 1.53.0 to 1.54.0.

Fixes the double title issue where page title and H1 heading both showed

the same text. Now only the page title is used — no redundant heading blocks

in either the parent or sub-pages.

AI prompt now instructs the model to suggest charts via [CHART: ...] markers

when data would be better understood visually. The orchestrator validates

column names against the actual dataset, parses chart markers, and creates

dataset-backed ChartBlock JSON (bar, line, pie) inline with the text.

Charts reference the source dataset by ID so they render live from the data.

Replace stale model lists across all three cloud providers: Gemini now

uses 2.5-series GA models (fixing 404 on retired preview), OpenAI adds

GPT-4.1 and o4-mini while dropping GPT-4 Turbo, Anthropic adds Claude

4.6 models. Settings panel now displays saved API keys with masked hints

and a delete button for each, backed by a new AiSavedKeyHints dictionary

in AppSettings. Deleting a key removes it from both the vault and the

persisted hints.

Shell-side orchestrator that receives DatasetInsightRequestMessage from the

Data plugin, calls AiService.CompleteAsync with a structured analysis prompt,

parses the response into sections, and saves results as Notes pages under a

"Duncan Generated Data Insights" parent page with table of contents.

New files:

• DatasetInsightOrchestrator.cs: Message handler + AI call + note creation
• DatasetInsightModels.cs: Result/section record types
• InsightPageBuilder.cs: JSON payload builder for Notes page creation

DI wiring in ServiceRegistration + eager activation in MainWindowViewModel.

Desktop version bumped to 1.53.0.