Replace Leaflet map tab with grouped locations panel

[Copilot]

This change removes the Leaflet-based map experience entirely and replaces it with a lightweight locations view. The tab keeps the existing London / World / Near me modes, but now renders grouped location intelligence instead of an interactive slippy map.

• UI replacement

  • Renames the map tab presentation to a locations-oriented experience.
  • Replaces the Leaflet mount point with a rendered locations panel shell in /index.html.
  • Updates copy and empty states to match the non-map workflow.

• Rendering model

  • Reworks /shared/map-watch.mjs from Leaflet asset/bootstrap logic into a pure renderer for:
    • grouped locations
    • severity rollups
    • summary chips
    • direct openDetail actions
  • Preserves mode behavior:
    • World groups by country
    • London / Near me group by local area
    • Near me still reflects geolocation availability and radius context

• Asset/runtime removal

  • Deletes vendored Leaflet JS/CSS and removes HTML references to those assets.
  • Simplifies CSP/image dependencies now that external tile imagery is no longer used.
  • Keeps existing tab/mode wiring intact so the rest of the app flow does not change.

• Styling

  • Replaces map/tile/popup-specific styles with locations panel styles for:
    • summary chips
    • grouped sections
    • per-alert action rows
    • responsive stacked layouts
  • Removes Leaflet-specific visual and control styling.

• Test coverage

  • Removes tests tied to Leaflet popups/assets.
  • Adds coverage for:
    • country normalization
    • grouping behavior by mode
    • nearby-mode summaries
    • rendered detail-action markup
  • Retains nearby distance/filtering assertions, updated for the new non-Leaflet semantics.

Example of the new rendering shape:

const groups = buildLocationGroups(alerts, MAP_VIEW_MODES.world);

mapElement.innerHTML = renderLocationsMarkup({
  alerts,
  groups,
  state,
  mode: MAP_VIEW_MODES.world
});

[potemkin666]

@copilot resolve the merge conflicts in this pull request

[Copilot]

Pull request overview

This PR removes the Leaflet-based map implementation and repurposes the existing map tab into a lightweight grouped locations panel, keeping the existing London / World / Near me mode wiring while changing the rendering model underneath.

Changes:

• Replaces Leaflet-driven map rendering with grouped location markup generated in shared/map-watch.mjs.
• Updates the app shell and styles to present the tab as a locations panel instead of an interactive map.
• Removes Leaflet assets/tests and adds focused tests for grouping, summaries, and rendered detail actions.

Reviewed changes

Copilot reviewed 13 out of 18 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
tests/nearby-map-mode.test.mjs	Renames nearby-radius test copy to match the non-Leaflet implementation.
tests/map-popup-accessibility.test.mjs	Removes popup-specific accessibility tests tied to deleted Leaflet UI.
tests/map-improvements.test.mjs	Removes legacy Leaflet/map behavior tests that no longer apply.
tests/location-panel.test.mjs	Adds tests for country normalization, grouping, summaries, and locations markup.
tests/leaflet-sri.test.mjs	Reworks asset tests to assert Leaflet references/assets are gone.
styles.css	Replaces map/popup/tile styling with grouped locations panel styling.
source-quarantine.html	Updates generated quarantine dashboard metadata snapshot.
shared/map-watch.mjs	Replaces Leaflet controller logic with grouped locations rendering/controller behavior.
index.html	Renames map UI copy to Locations and swaps the Leaflet mount for the new panel shell.
data/top-20-source-remediation.json	Updates generated remediation snapshot data.
data/source-remediation-sweep.json	Updates generated remediation sweep snapshot data.
assets/vendor/leaflet/leaflet.js	Removes vendored Leaflet runtime asset.
assets/vendor/leaflet/leaflet.css	Removes vendored Leaflet stylesheet asset.
assets/vendor/leaflet/LICENSE	Removes vendored Leaflet license file alongside asset removal.
app/boot/elements.mjs	Points bootstrapped map element lookup at the new locations panel container.

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[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved in 58aa0ca with a true merge commit from origin/main, so the PR now includes the base branch history and the generated feed/catalog conflicts are cleared.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Sort nearby groups by distance from the user

In MAP_VIEW_MODES.nearby, groups are still ordered by alert count and severity, not proximity, so a farther location with more/severer alerts can appear before a closer one. This breaks the nearby-mode behavior described in the panel copy (“Surface the closest places first”) and makes the “Near me” tab unreliable for quick local triage when multiple areas are within radius.

Useful? React with 👍 / 👎.

[chatgpt-codex-connector]

Render all alerts in each location group

Each group only renders the first three alerts (slice(0, GROUP_PREVIEW_LIMIT)), and the remaining alerts are shown as plain text (“+N more”) without any openDetail action. In groups with more than three alerts, users cannot open those additional incidents from the Locations tab, which is a functional regression from the prior map behavior where every visible alert was actionable.

Useful? React with 👍 / 👎.