Bundle Leaflet JS, CSS, and marker/layer images as embedded assets served
under /vendor/ instead of loading from unpkg.com, which content blockers
(e.g. Safari) prevent.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
Extract map-core.js (3,483 lines) and screenshot.js (261 lines) from
the monolithic app.js, reducing it by ~30% (11,967 → 8,427 lines).
Modules communicate via a window.trx shared namespace with getter/setter-
backed state proxying. Map and statistics code lazy-loads on first tab
activation; screenshot code lazy-loads on first "S" keypress. All cross-
module calls use optional chaining for safe access before modules load.
Adds Rust infrastructure (include_str, gz_cache, Actix routes) for
serving the new JS assets.
https://claude.ai/code/session_01HgW8UpscRRA3CgSLqQDzdp
Signed-off-by: Claude <noreply@anthropic.com>
CSS: reduce backdrop-filter to modals only, add contain/content-visibility
for inactive tabs, optimize transitions to background-color, pre-compute
color-mix results, add container queries, split themes to lazy-loaded file.
JS: cache DOM refs in render path, add field-level diffing for SSE updates,
replace innerHTML with replaceChildren() in hot paths, add WebGL colour
cache invalidation on theme switch.
HTML: add defer to scripts, lazy-load plugin scripts on tab activation,
SVG sprite sheet for tab icons, template elements for deferred tab content,
improve aria-live/keyboard nav/colour contrast accessibility.
Server: upgrade Cache-Control to immutable, add Brotli compression alongside
gzip with Accept-Encoding negotiation.
Implements all items from docs/frontend_improvements.md except app.js ES
module split (P1, requires major refactor) and Web Worker migration (P3).
https://claude.ai/code/session_015rQNMGvusj5jY66MPUgYqt
Signed-off-by: Claude <noreply@anthropic.com>
sjg
Claude