Similar to removal of inline scripts, everything was taken out into the
CSS files, with the same styles applied there directly. This lets us
use `script-src 'self'` in the CSP.

Additionally, serve Golden Layout CSS locally to avoid third-party
connection.

Construct DOM nodes directly instead of trying to sanitize every input
string and dynamically updating HTML.

Replace all uses of innerHTML with textContent, replaceChildren, and
appendChild.

This removes the need to use safeTags and replace newlines, but now
requires preserving whitespace via CSS pre-wrap.

Every OOC chat line is now placed into its own element instead of simply
being appended to the log. This might be worse, and createTextNode
is another alternative.

- Redesign disconnect overlay as a full-screen modal with dark backdrop
- Add working Reconnect button that properly re-establishes WebSocket connection
- Add Disconnect button in Settings for testing
- Separate disconnect and ban/kick codepaths (no reconnect on ban)
- Log disconnect notice in IC log using hrtext style
- Refactor area list rendering from client state (renderAreaList)
- Extract appendICNotice for reusable IC log notices
- Clean up charselect: hide during loading, simplify toolbar layout
- Freshen loading screen and charselect styling
- Remove loading progress text updates (just show "Loading...")
- Guard against undefined client.chars and client.serv

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Hide players not in the client's current area. Re-render playerlist
on area switch. Remove the now-redundant Area column.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Render char icons and names from the character name string (PU type 1)
instead of gating on charId lookup. Add header row and row separators
to the playerlist table.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

This reverts commit f0048ed97916071d71e4e629f249ae5360e5ff41.