Format entire codebase with Prettier (mechanical, no behavior change)

docs/spec/06-chart-builder.md

@@ -1,11 +1,11 @@
 # 06 · Chart Builder
 
-The Chart Builder is a visual, no-JSON way to compose a Vega-Lite chart from a selected dataset. The user picks a mark type and maps the dataset's columns to encoding channels; the builder produces a complete Vega-Lite spec and saves it as a new snippet that references the dataset. It is intended for users who want to start a chart quickly without hand-writing JSON in the *Spec Editor & Draft/Published Workflow*.
+The Chart Builder is a visual, no-JSON way to compose a Vega-Lite chart from a selected dataset. The user picks a mark type and maps the dataset's columns to encoding channels; the builder produces a complete Vega-Lite spec and saves it as a new snippet that references the dataset. It is intended for users who want to start a chart quickly without hand-writing JSON in the _Spec Editor & Draft/Published Workflow_.
 
 ## Opening
 
-- Launched from a selected dataset in the *Datasets* manager via that dataset's "build chart" action.
-- Opens as a modal dialog over the application; the URL reflects the dataset's "build" action so the open builder is shareable/restorable (see *Application Shell & Navigation*).
+- Launched from a selected dataset in the _Datasets_ manager via that dataset's "build chart" action.
+- Opens as a modal dialog over the application; the URL reflects the dataset's "build" action so the open builder is shareable/restorable (see _Application Shell & Navigation_).
 - On open, the builder loads the selected dataset, displays its name, and pre-populates sensible defaults (see below). If no dataset is available, it shows a "No dataset loaded" message and offers no controls.
 
 ## Layout
@@ -27,7 +27,7 @@ A two-pane modal:
 
 - Exactly four channels are offered, in this order: **X, Y, Color, Size**.
 - For each channel the user:
-  - Picks a dataset column from a dropdown of the dataset's detected columns (see *Datasets* for column detection). A "None" option leaves the channel unmapped. Each column option shows a small type indicator alongside the column name.
+  - Picks a dataset column from a dropdown of the dataset's detected columns (see _Datasets_ for column detection). A "None" option leaves the channel unmapped. Each column option shows a small type indicator alongside the column name.
   - Optionally overrides the channel's **field type**, chosen from an exact set: **Quantitative, Nominal, Ordinal, Temporal**. The type override only appears once a column is selected for that channel.
 - When a column is chosen, its field type defaults from the dataset's inferred column type (numeric → Quantitative, date → Temporal, otherwise Nominal); the user may change it afterward.
 - Clearing a channel back to "None" leaves it out of the produced spec.
@@ -39,11 +39,11 @@ A two-pane modal:
 ### Dimensions (optional)
 
 - Optional numeric **Width** and **Height** inputs in pixels.
-- When left empty, the chart uses default/responsive sizing (consistent with *Live Preview*); when provided, the values are written into the spec.
+- When left empty, the chart uses default/responsive sizing (consistent with _Live Preview_); when provided, the values are written into the spec.
 
 ## Live Preview
 
-- The right pane renders the chart described by the current mark, encodings, and dimensions, resolving the dataset reference to its actual data (same rendering behavior as *Live Preview*).
+- The right pane renders the chart described by the current mark, encodings, and dimensions, resolving the dataset reference to its actual data (same rendering behavior as _Live Preview_).
 - Updates are debounced: changes to mark, encodings, or dimensions trigger a re-render after a short pause rather than on every keystroke.
 - While no encoding is mapped, the pane shows a placeholder instructing the user to configure at least one encoding.
 - If the spec fails to render, the pane shows an inline error message describing the problem instead of a chart.
@@ -60,7 +60,7 @@ Selecting "Create Snippet" produces the final artifact:
 - Builds a complete Vega-Lite spec containing: the schema reference, a named data reference to the dataset, the chosen mark (with tooltips enabled), the mapped encodings (each with its field and field type), and any explicit width/height.
 - Channels left unmapped are omitted; if no encodings exist the spec omits the encoding block entirely (prevented by validation here).
 - Creates a new snippet from that spec with an auto-generated descriptive name, adds it to the snippet library, and records that it was built from the dataset.
-- Links the snippet to the dataset by recording the dataset reference, so the bidirectional snippet↔dataset relationship is established (see *Datasets*).
+- Links the snippet to the dataset by recording the dataset reference, so the bidirectional snippet↔dataset relationship is established (see _Datasets_).
 - Raises a success toast naming the created snippet.
 - Closes the builder; the newly created snippet becomes the active snippet in the library/editor.