fix(catune): repair tutorial highlighting after Peak/FWHM migration

[daharoni]

Summary

The tutorial overlay was misbehaving in CaTune because several of its driver.js step selectors no longer pointed at real DOM elements after the kernel parameter migration from tau_rise/tau_decay to Peak/FWHM.

Broken selectors:

• [data-tutorial="slider-decay"] — renamed to slider-fwhm in ParameterPanel, never updated in the tutorial content (3 references across 3 tutorials).
• [data-tutorial="slider-rise"] — renamed to slider-peak, same story (2 references across 2 tutorials).
• [data-tutorial="resize-handle"] — never existed; the Card component's resize-handle div was unlabeled.

So the tutorial would highlight nothing (or fall back to a sibling/parent, depending on driver.js's behaviour for missing targets) on any step touching a kernel-param slider or the "Card Height" step.

Fixes in this PR:

• Selector renames in tutorial content (slider-decay → slider-fwhm, slider-rise → slider-peak).
• Added data-tutorial="resize-handle" to the Card resize handle in @calab/ui.
• Rewrote step titles, body text, and comments that still described τ_rise / τ_decay so the popover narrative matches the slider it highlights. Mapping used: Decay Time → FWHM (event width); Rise Time → Peak Time. Tuning order / parameter coupling / artifact causes updated accordingly.
• The 05-theory tutorial and 04-features (community scatter plot axes) continue to reference τ values directly because the underlying kernel math and the community submission schema still use them — left untouched.
• Stale JSDoc example in packages/tutorials/src/types.ts.

Cross-checked every selector referenced in tutorial content against live data-tutorial= attributes across apps/catune/src and packages/*/src: no unmatched selectors remain.

Test plan

• npx tsc -b apps/catune — clean
• npx prettier --check on touched files — clean
• npm test --workspaces — 62/62 pass (catune + io, no regressions)
• Needs human UI verification: launch each of the three tutorials (basics, workflow, advanced), step through to completion, and confirm the highlight box lands on the right slider / resize handle at each step and the popover text matches.

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