The chunked API handlers and the maxblock<6000 auto-restart from 4b59b89
broke the web UI on-device; restore the working String-based handlers and
plain loop while keeping the scrollable forecast log.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Cap the log panel at ~216px with a thin themed scrollbar so a long
forecast history does not stretch the page.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Serving /api/history (and /api/forecasts) built a ~12 KB String +
JsonDocument every 15 s; over days this fragmented the ESP8266 heap until
the TCP stack could no longer send a full response, causing the web page
to fail with ERR_CONTENT_LENGTH_MISMATCH. Stream both array endpoints via
chunked transfer (small stack buffer, no big allocations). Add free-heap
to /api/current and Serial, plus a low-memory safety restart (history is
persisted first).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
oskarvitaliiandClaude Opus 4.8