feat(examples): add Weather SDL2 app (Open-Meteo)#8
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Port of the Phoebe LVGL app_weather to a standalone 320x170 SDL2 program. Fetches current conditions from the keyless Open-Meteo API on a background libcurl thread, parses the small flat JSON by hand (no JSON lib), and draws a procedurally animated icon (breathing sun / cloud / falling rain) chosen by WMO weather code. Code->category/text tables from Phoebe ui_common.h. Config via env: WEATHER_LAT, WEATHER_LON, WEATHER_CITY (default Colombo). Keys: ESC / Q quit.
Press L (or M) in the weather view to open a keyboard-navigable list of preset cities (Colombo, London, New York, ... 15 total). Arrows move, ENTER selects, ESC cancels. Selecting a city updates the location under a mutex and signals the fetch thread to refetch immediately (shows 'fetching...' then the new city's conditions). WEATHER_LAT/LON/CITY env still seed the initial location. Top-left 'L:loc' hint advertises the picker. Verified in the emulator: picker lists cities, selecting London refetches and renders London weather live.
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Port of the Phoebe LVGL app_weather to a standalone 320x170 SDL2 program. Fetches current conditions from the keyless Open-Meteo API on a background libcurl thread, parses the small flat JSON by hand (no JSON lib), and draws a procedurally animated icon (breathing sun / cloud / falling rain) chosen by WMO weather code. Code->category/text tables from Phoebe ui_common.h.
Config via env: WEATHER_LAT, WEATHER_LON, WEATHER_CITY (default Colombo).
Keys: ESC / Q quit.