Put every setting on the page instead of in folds and drop-downs

[rndaom]

Settings were spread across caret folds ("Fine-tune modules", "HUD options", "Customize weapons", "Pitch and repeat timing", Mods' file check and Casual lists, credits) and a few <select> menus. Folds made the panes look unfinished and hid settings people need to find. This replaces each fold with a layout that shows everything.

What changes

• Comfig gets two tabs: Preset and addons, and Modules. Modules lists all 40 modules grouped by category, with search and All / Changed / category filters. The tab shows how many modules differ from the preset.
• HUD: an installed HUD's options are always shown, in columns by schema section. Combos with more than four choices and HUD crosshair glyphs are chip pickers instead of <select> menus.
• Viewmodels: each class is one Shown / Hidden / Hands only table, with every weapon group under its slot. This replaces Customize weapons and its per-weapon menus. Discard choices moves into the toolbar.
• Sounds: pitch and repeat delay sit in each sound's own column.
• Mods: File check, Casual addons and particles, and each pack's Casual note are plain sections. The "About these results" note only appears with an empty page, which is the one time it matters.
• App settings credits, Inventory history item IDs, and the mod and profile import reviews show their details directly.

There are two new shared controls: ChoiceChips, a wrapping version of the segmented pill, and ChoiceMatrix, rows of one choice under shared columns. Disclosure and the fold caret are removed. The HUD, Mods and Comfig tab strips now share one hairline, where the old markup drew two.

The design rules in docs/ARCHITECTURE.md, the pane guides and the changelog are updated.

Overlaps with #168 in ViewmodelBuilder.tsx. Whichever lands second keeps #168's out-of-date notice and "stays partly visible" lines in the new table.

Checks

• pnpm test: 1,417 desktop, 172 cfglint and all script tests pass.
• pnpm check and pnpm build pass.
• Checked in the browser preview at 1280×800 and 960×640: Comfig, HUD, Viewmodels, Sounds, Mods and App settings.