Expand FAR capture curriculum to 198 questions

[jsolly]

Summary

• expand the curriculum to 198 fact-checked questions across Fundamentals and seven capture lifecycle units
• replace the hub chart with eight full slices and a fixed 8-question, 80% placement gate
• improve placement persistence, scoring integrity, keyboard focus, contrast, and responsive behavior
• intentionally reset local progress with the v2 storage key; no legacy migration layer

Test plan

• Run action and shell checks (npm run check:actions)
• Run Astro/Svelte type checks (npm run check:ts)
• Build the static production bundle (npm run build)
• Smoke desktop and mobile placement pass/fail, gated/unlocked slices, keyboard focus, and console output
• Run light ship review (guidelines, bugs, security, secrets, code quality, accessibility)

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