Use Geist with tabular figures for standalone numerals

[sejhere]

Standalone numerals now render in Geist with tabular figures,
matching the ruling already in use in the mobile app. Mono
stays for addresses and uppercase labels, and remains the
default for protocol data such as hashes and checkphrases.

The two commits are causally linked. The mainnet ticker item
was a single fused string, so both halves were mono and the
inconsistency was invisible; it only surfaced as a bug once
.t-val changed font. Note also that .t-val lives in a
deliberate <style is:global> block, since the JS-generated
ticker elements carry no scope attribute.

Commits

1. Use Geist with tabular figures for standalone numerals —
   four CSS declarations: .t-val, .cell-num,
   .tech-stat-num, .launch-stat-value.
2. Split mainnet ticker item into label and value — the
   item was a single fused string, so its date could not follow
   the rule. Split into label and value like its siblings across
   all nine locales. Removed the glitch effect on that item,
   which scrambled characters and depended on fixed-pitch
   widths. Replaced duplicate element ids with a data-ticker
   attribute.

Locale keys 628 -> 629, exact parity across all nine.
22 tests pass. astro build passes.

Not in this pass

• The qday-checker terminal, where column alignment depends on
  fixed-pitch
• Mixed strings where the numeral is not its own element

Follow-ups, both pre-existing and now more visible

• Six locales (de, es, hi, id, ko, ru) have an untranslated
  MAINNET label, inherited from the combined string
• .wallet-stat-num renders 430, NIST 5 and 0 through one
  class; "NIST 5" is an algorithm label styled as a quantity
• 99.97% is hardcoded in ticker.ts, so its decimal separator
  cannot localise

format:check fails as it already does on main (CRLF vs LF).

[n13]

Reviewer model: GPT 5.6 Sol

APPROVE — no blocking findings.

The four standalone numeric styles consistently switch from Geist Mono to Geist with tabular figures. The ticker refactor preserves both marquee copies, updates both live values through non-duplicated data-ticker selectors, splits the mainnet label/value across all nine locales, and fully removes the obsolete glitch loop.

Validation:

• git diff --check 9f713187...fbbad3b: passed
• npx --yes bun test: 22 passed, 0 failed
• npx --yes bun run build: passed; 1,444 pages built
• Locale parity: 629 leaf keys across all 9 locales; generated EN/JA/ZH ticker attributes and bundled live-value selectors verified
• npx --yes bun run format:check: remains non-clean on formatter-only drift in 27 files; no correctness issue found in the reported changed files

GitHub reports no automated checks for this head. Local focused validation found no blocking issues.