[ocots]

Conventions: ct-conventions v0.11.0; ct-agents v0.4.0.

Last point of the review of the examples (#229), checked against the rewritten site (#408):

Point of #229	Now
Wrong first-line comment, named tuples printed raw	the old problem template is gone (#408); parameters are a table
Plot labels of JuMP differ locally and on the site	the Plot page draws both with plot!(solution(…)) and labels (#408)
CT* packages held back at old versions	gone with the port to OptimalControl v2 (#283)
MKL warning on Apple silicon	it came from CTDirect 0.17, which depended on MKL (docs manifest of March 2026); the current CTDirect does not: nothing to document
Small numerical differences with the site	this PR: a paragraph in the Problems overview: rounding differs between platforms and a solver stops within its tolerance; each problem page gives the platforms of each configuration and the range of their objectives

Lint: markdownlint and typos clean.

Closes #229. With it, the checklist of #307 is complete.

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