Add a persistent "Show line numbers in code blocks" setting to Editor
Settings that controls line-number visibility across all code blocks.
Individual blocks can still override the global default via the
per-block More menu toggle.
## Changes
- **schema.ts** - add `codeBlockLineNumbers: z.boolean().default(true)`
to `AffineEditorSettingSchema`
- **code-block.ts** - read `codeBlockLineNumbers` from
`EditorSettingProvider` reactively via a stable `signal(true)` updated
by `effect()` in `connectedCallback`; expose `showLineNumbers` getter as
single source of truth used by both `renderBlock()` and the toolbar
- **config.ts** - toolbar line-number toggle reads
`blockComponent.showLineNumbers` (resolved state) instead of
`model.props.lineNumber ?? true`
- **general.tsx** - add `DefaultCodeBlockLineNumberSettings` Switch row
in editor general settings
- **en.json + i18n.gen.ts** - add i18n strings for the new setting
- **line-numbers.spec.ts** - add 7 e2e tests covering default
visibility, global toggle on/off, per-block override in both directions,
multi-block, newly created blocks, and persistence across reload
## Behaviour
| State | Result |
|---|---|
| Global ON (default), no per-block override | Line numbers shown |
| Global OFF, no per-block override | Line numbers hidden |
| Global OFF, per-block explicitly ON | Line numbers shown |
| Global ON, per-block explicitly OFF | Line numbers hidden |
| Mobile (feature flag) | Always hidden regardless of settings |
## Notes
- Existing per-block toggle behaviour is fully preserved and unchanged
- Default is `true` so no regression for existing users
- The blocksuite-side reads `codeBlockLineNumbers` via a type cast (`as
Record<string, unknown>`) because the key lives in the AFFiNE-level
`EditorSettingSchema`, not in blocksuite's own `GeneralSettingSchema` -
this is an intentional architectural boundary
Closes#14965
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Added a global setting to show or hide line numbers in code blocks by
default.
* Added localized title and description text for the new setting.
* Preserved per-code-block overrides through the block’s More menu.
* **Bug Fixes**
* Line-number visibility now stays consistent across existing and newly
created code blocks, including after reloads.
* **Tests**
* Added end-to-end coverage for defaults, overrides, persistence, and
multiple code blocks.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **New Features**
* Typst code block preview with interactive rendering controls (zoom,
pan, reset) and user-friendly error messages
* **Style**
* Centered Mermaid diagram rendering for improved layout
* **Tests**
* Added end-to-end preview validation tests for Typst and Mermaid
* **Chores**
* Added WebAssembly type declarations and updated frontend packages;
removed a build debug configuration entry
<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
#### PR Dependency Tree
* **PR #12848** 👈
This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced a feature flag to enable or disable web container
functionality for code block previews.
- **Improvements**
- Code block HTML previews now support an alternative rendering method
based on the new feature flag, enhancing flexibility.
- **Chores**
- Updated feature flag settings by removing an obsolete flag and adding
the new web container flag.
- **Tests**
- Simplified code block preview tests for faster and more direct
validation of HTML preview content.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit
- **New Features**
- Introduced a preview mode for code blocks, allowing users to toggle between code and rendered previews (e.g., HTML output) directly within the editor.
- Added a preview toggle button to the code block toolbar for supported languages.
- Enabled dynamic rendering of code block previews using a shared WebContainer, allowing live HTML previews in an embedded iframe.
- Added HTML preview support with loading and error states for enhanced user feedback.
- Integrated the preview feature as a view extension provider for seamless framework support.
- **Bug Fixes**
- Improved toolbar layout and button alignment for a cleaner user interface.
- **Tests**
- Added end-to-end tests to verify the new code block preview functionality and language switching behavior.
- **Chores**
- Updated development server configuration to include enhanced security headers.
- Added a new runtime dependency for WebContainer support.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
MrX