Fix event date filtering for UTC-negative timezones + missing Google token injection for 19hz

[Copilot]

The 19hz map showed 0 events when filtering by date because ISO date strings were parsed as UTC midnight, causing an off-by-one day error for users in UTC-negative timezones (San Francisco = UTC-7/UTC-8). Additionally, __GOOGLE_TOKEN__ was never injected into 19hz/index.html during deploy.

Changes

• Date filter timezone fix (19hz/map.js, map.js): Parse event.date as local time to match how filter dates are already parsed:

  // Before — parses as UTC midnight; getDate() returns 17 in PDT for "2026-03-18"
  let eventDate = new Date(event.date);
  
  // After — parses as local midnight; getDate() returns 18
  let eventDate = new Date(event.date.replace(/-/g, '/'));

• parseCSVDate ISO string (19hz/map.js): Build the date string directly instead of via toISOString(), which converts local midnight to UTC before formatting:

  // Before
  iso: eventDate.toISOString().split('T')[0]
  // After
  iso: `${year}-${String(month + 1).padStart(2, '0')}-${String(day).padStart(2, '0')}`

• Deploy workflow (deploy.yml): Added 19hz/index.html to the Google token sed replacement; removed redundant duplicate line for __APIFY_TOKEN__.

• Cache freshness (19hz/map.js, map.js): isFresh(old = 86400) defaulted to 86.4 seconds, not 24 hours — changed to 86400000.

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[github-actions]

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