Weather forecast page, 16 elements per page, attribute paths, examples from the display

- Home Assistant attributes can be paths into lists (forecast.1.condition).
- Date elements can show a day ahead (day offset 0-7).
- Pages hold 16 elements (page format 6; the old formats are frozen at 8).
  Pages are reset in place (clearPage), not through a 4 KB temporary.
- Verwachting page: today (icon, temperature, max/min) and the next 2
  days with 7 x 7 icons (weer7 <condition>), from a template sensor
  (docs/home-assistant.md).
- examples/home-pages.json is exported from the display with all pages
  and their icons, private entity id parts replaced by placeholders
  (tools/export_examples.py replaces tools/make_example_pages.py).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/web-ui.md

@@ -23,7 +23,7 @@ Bitmaps that pages or rules use are in their own subsection.
 ## Pages
 
 Dynamic pages: a background per time of day, a bitmap or an [icon](#icons) (e.g. Pikachu
-from 00:00, yawning Pikachu from 17:00) with up to 8 elements on top. The preview is drawn by the ESP32, so it
+from 00:00, yawning Pikachu from 17:00) with up to 16 elements on top. The preview is drawn by the ESP32, so it
 is exactly what the display shows; drag the elements on it, or select one and use the
 arrow keys. The Clock page (Pikachu, the default) is a normal page that can be changed;
 its Reset button brings back the original. See the [pictures of the pages](pages.md).
@@ -31,8 +31,8 @@ its Reset button brings back the original. See the [pictures of the pages](pages
 | Element | Options |
 |---------|---------|
 | Clock | `08:05`, `8:05`, optionally with seconds |
-| Date | 7 formats, Dutch or English (`do 15 okt`, `15 oktober`, `donderdag`, ...) |
-| Home Assistant value | An entity or attribute, text before and after. Shown as a number (multiplier, decimals, auto unit `1257 W` → `1.3 kW`, without minus sign), a duration (`2h 21m`, `2:21:00`, `2:21`, `2 uur`), a time from an HA timestamp (`23:07`, `do 23:07`, `15-10 23:07`, `over 34 min`) or with own texts per state (`printing=Bezig, standby=Klaar`) |
+| Date | 7 formats, Dutch or English (`do 15 okt`, `15 oktober`, `donderdag`, ...), today or up to 7 days ahead (the weekdays of a forecast) |
+| Home Assistant value | An entity or attribute (also a path into lists, e.g. `forecast.1.temperature`), text before and after. Shown as a number (multiplier, decimals, auto unit `1257 W` → `1.3 kW`, without minus sign), a duration (`2h 21m`, `2:21:00`, `2:21`, `2 uur`), a time from an HA timestamp (`23:07`, `do 23:07`, `15-10 23:07`, `over 34 min`) or with own texts per state (`printing=Bezig, standby=Klaar`) |
 | Text | Up to 32 characters |
 | Countdown | To a date and time: smart (`12 dagen`, `5 uur`, `34 min`, `0:45`), days, `12d 04:05`, with seconds; a text when it has passed |
 | Stopwatch | `4:05`, `0:04`, `0:04:05`; started in the [Stopwatch](#stopwatch) tab or Home Assistant |