fix(ui): make layout responsive across all desktop resolutions (960px to ultrawide)

[NicoRuedaA]

Approved issue

Closes #220

• The linked issue has status:approved.
• This PR targets development unless it is a maintainer release/hotfix PR.
• This PR has exactly one type:* label.

Summary

• Fix viewport meta tag: replaced hardcoded width=1366 lock with width=device-width, initial-scale=1.0, removed maximum-scale=1.0, user-scalable=no to allow proper window resize behavior on desktop.
• Added --text-2xs: 0.625rem custom token to Tailwind theme — enables rem-based font scaling for dense UI text that was previously hardcoded in pixels.
• Table overflow protection: Wrapped 7 tables across ManagerTab, TeamProfileHistoryCard, YouthAcademyTab, TournamentsTab, and SubPanel in overflow-x-auto to prevent horizontal clipping at narrow window sizes.
• Text size normalization: Replaced 342+ hardcoded text-[Npx] values across 63 components with proper rem-based Tailwind tokens (text-2xs, text-xs, text-sm, text-base, text-xl, text-2xl, text-3xl, text-4xl, text-5xl). This ensures text scales correctly with the user''s ui_scale setting.
• Min-width normalization: Replaced hardcoded min-w-[Npx] with theme tokens in ChampionsTab, PlayoffBracketBoard, ChampionsGrid, SquadRosterView, and ScheduleCalendarView.
• SubPanel modal fix: Changed w-[1100px] to max-w-[1100px] w-[95vw] so the substitution modal fits within the 960px minimum window.
• High-resolution container expansion: Changed 22 main content wrappers from fixed max-w-* to w-[92%] max-w-[2000px] mx-auto — containers now expand proportionally on QHD (2560px), 4K, and ultrawide displays instead of leaving 50%+ empty margins.
• Grid column scaling: Added 2xl: breakpoints to HomeTab, FinancesTab, TrainingTab, and ManagerTab grids so they show more columns on larger screens (e.g., 2xl:grid-cols-4 at 1536px+).
• ChampionDraft outer layout: Added responsive breakpoints (2xl:grid-cols-20, lg:w-[280px] xl:w-[300px] panels, max-w-[2000px] 2xl:max-w-[90vw] container) to the 3355-line draft screen — outer layout only, zero internal logic touched. compactTier verified: no clipping at 960px minimum window.
• Ultrawide readability: Capped content width at 2000px to prevent excessive line lengths on 3440px+ monitors.

Key stats

Metric	Value
Files modified	75
Lines changed	+802 / -664
text-[Npx] replacements	342+ in 63 components
Containers expanded	22 wrappers
Table overflow wrappers	7
Grid 2xl: breakpoints	5 components
Tests	655 passed, 0 failed

Checks run

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• frontend-full-experimental (npm test, npm run build:types).
• rust-full-experimental (cargo clippy --workspace --all-targets -- -D warnings, cargo test --workspace).

Do not mark the experimental full checks as required for this PR unless a maintainer explicitly asks.

Documentation and provenance

• Documentation was updated or no docs change is needed.
• Data provenance was updated or no provenance change is needed.
• No unclear third-party data, generated cache, secret, signing key, or private credential is included.

Release impact

• Changelog entry added or not needed.
• Version changes are synchronized across package.json, src-tauri/Cargo.toml, and src-tauri/tauri.conf.json when applicable.