Fix CSP errors, font preload 404, and theme-toggle.js deployment

[Copilot]

Multiple browser console errors: CSP frame-ancestors ignored in meta tags, hardcoded Inter font preload returning 404, theme-toggle.js missing from build output (MIME type error), and d3-dsv csvParse blocked by CSP due to new Function() requiring unsafe-eval.

CSP meta tag cleanup

• Removed frame-ancestors 'none' — only valid as HTTP header, ignored in <meta> elements
• Applied across all 43 HTML files and both generation templates

Font preload removal

• Removed hardcoded preload for UcC73FwrK3iLTeHuS_fvQtMwCp50KnMa2JL7.woff2 (stale URL, 404)
• Google Fonts CSS handles font file resolution dynamically; preconnect hints are sufficient

theme-toggle.js static asset fix

• Created public/js/theme-toggle.js so Vite copies it to dist/js/ unchanged
• Vite skips non-type="module" scripts during bundling — file was silently missing from build output

CSV parsing: d3-dsv → PapaParse

• Replaced d3.csvParse() with PapaParse (already a dependency) as primary parser in coalition-dashboard.ts, risk-dashboard.ts, and shared/data-loader.ts
• PapaParse doesn't use new Function(), eliminating the unsafe-eval CSP requirement entirely
• d3.csvParse retained as fallback

// Before: requires unsafe-eval in CSP
return d3.csvParse(text) as CSVRow[];

// After: CSP-compatible, no unsafe-eval needed
const Papa = (globalThis as any).Papa;
if (Papa) {
  const parsed = Papa.parse(text, { header: true, skipEmptyLines: true });
  return parsed.data as CSVRow[];
}
return d3.csvParse(text) as CSVRow[];

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