fix: counters/life-blocks broken due to missing Chart.js date adapter; dynamic rate; 22 milestones; E2E tests

[Copilot]

initChart() threw an uncaught exception ("This method is not implemented: Check that a complete date adapter is provided") because Chart.js 4.x requires an explicit date adapter for type: 'time' axes. This crashed init() before initLifeBlocks() and requestAnimationFrame(updateCounters) could run — leaving the total counter on "Loading…", session tokens at 0, and life blocks blank.

Root fix — self-hosted Chart.js date adapter

New chart-date-adapter.js implements the full _adapters._date interface (no external deps, loaded from self). initChart() is also wrapped in try/catch so future chart failures can't cascade.

<!-- index.html load order -->
<script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.js" ...></script>
<script src="chart-date-adapter.js"></script>  <!-- new -->
<script src="script.js"></script>

Dynamic rate display

TOKENS_PER_SECOND was hardcoded in HTML and never updated. Added RATE_SCHEDULE (14 entries keyed to landmark AI events: ChatGPT launch, GPT-4, Claude 3 Opus, GPT-4o, Llama 3.1, DeepSeek R1, Claude Code GA, etc.) and getRateAtDate(date) to death-clock-core.js. The rate box is now updated every RAF cycle showing the current rate and the triggering event.

Milestones

Expanded from 7 → 22 milestones spanning 1 Trillion to 10 Quintillion tokens. New entries include near-term upcoming thresholds (Power Grid Strain, Arctic Ice-Free Summer, Wildfire Crisis, Permafrost Methane Bomb, Ocean Acidification Threshold, Jet Stream Collapse, etc.) and far-future collapse events.

DOM safety

With the last milestone at 10 Quintillion tokens (~1.2 M days away), lbRenderDays() would have created 1.2 million DOM elements. Capped at 3,650 blocks (~10 years) with a +Xy overflow indicator.

CSP

Added the Firefox-reported sha256-ZswfTY7H35rbv8WC7NXBoiC7WNu86vSzCDChNWwZZDM= hash to the script-src directive.

Tests

• 110 Jest tests (up from 91): new suites for getRateAtDate, RATE_SCHEDULE invariants (monotonic dates/rates, required events present), and extended milestone checks (uniqueness, field presence, magnitude span).
• 21 Playwright E2E tests (new in tests/e2e/): counter liveness, milestone card count/triggered state, life-block drill-down, chart canvas dimensions, theme toggle, XSS guard, zero uncaught JS errors.

[nitrocode]

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