fix(docs): render inline SVG diagrams correctly

[chaliy]

What changed

Inline SVG diagrams now render as complete diagrams across all four affected guides instead of exposing their remaining SVG markup as code.

The site postbuild now rejects blank lines inside inline SVG blocks in both canonical guide trees, preventing the rendering failure from recurring. The durable authoring constraint is recorded in the documentation playbook.

Why

CommonMark ends a raw HTML block at a blank line. Blank lines inside the diagrams split each SVG during Markdown rendering, leaving only the first group visible and displaying the rest as escaped source.

Before / After

Before:

After:

Proof:

• Regression verifier failed on the four affected guides before the fix and passes after it.
• Full site build and postbuild validation pass.
• Browser smoke test finds one complete SVG with 6 rectangles and 8 text labels, with zero leaked SVG source.
• just pre-pr passes.

Risk

• Low
• Limited to Markdown diagram formatting and site documentation validation.

Checklist

• Tests added or updated
• Backward compatibility considered

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	bashkit	c76fc5d	Commit Preview URL Branch Preview URL	Aug 31 2026, 11:52 PM