feat: support content chunk updates with dot notation and fix richTex…

[sweden-snow]

…t mutations

• Add nested component updates via dot notation (e.g. image-and-title.title),
• Round-trip sibling preservation with contentToInput,
• Fix richText mutations to use json format instead of invalid plainText field.

[Copilot]

Pull request overview

This PR extends the content mutation tooling to support updating nested components inside contentChunk components using dot notation, improves mutation round-tripping to preserve sibling fields, and fixes rich text mutations to use a JSON payload instead of an invalid plainText input.

Changes:

• Add dot-notation support for updating contentChunk child components (e.g. hero.title) in update_component.
• Introduce contentToInput to rebuild mutation inputs from existing content to better preserve siblings during updates.
• Update rich text mutation input to use richText.json instead of richText.plainText, and expand docs/tests accordingly.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/tools/content.ts	Implements dot-notation parsing, chunk-child updates, sibling round-tripping, and richText JSON mutations.
tests/content.test.ts	Updates dry-run stubs and adds coverage for dot-notation updates and invalid chunk child errors.
README.md	Documents write tools, dry-run mode, and content tools; updates the tool count.

Comments suppressed due to low confidence (1)

src/tools/content.ts:633

• The dry-run preview string still says Mutation: item.updateComponent(...), but the actual mutation executed below is updateComponent(...) (root field) via nextPimApi. Update the preview text to match the real mutation shape so users aren’t misled when reviewing dry-run output/audit logs.

            `Current value: ${currentValue}`,
            `New value: ${JSON.stringify(value)}`,
            '',
            `Mutation: item.updateComponent(itemId: "${itemId}", language: "${language}", component: ${JSON.stringify(componentInput)})`,
            '',

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

Comments suppressed due to low confidence (1)

src/tools/content.ts:658

• Dry-run preview still prints item.updateComponent(...), but the actual mutation executed below is updateComponent(...) (top-level). This makes the preview misleading; align the dry-run “Mutation:” line with the real mutation shape (or update the mutation if the nested form is the correct API).

            `Current value: ${currentValue}`,
            `New value: ${JSON.stringify(value)}`,
            '',
            `Mutation: item.updateComponent(itemId: "${itemId}", language: "${language}", component: ${JSON.stringify(componentInput)})`,
            '',

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.