feat(eosdash): plan page with EMS plan timeline and persisted settings (#1460)

* feat(eosdash): plan page with EMS plan timeline and persisted settings

Fixes:
- SolutionCard no longer appends to the module-level solution_excludes
  list on every render (the list grew without limit).
- All EOSdash pages: keep the scroll position after htmx actions instead
  of jumping to the bottom; Bokeh() reserves the plot height.
- Default visible PV column pvforecast_power_w -> pvforecast_ac_energy_wh
  (the old column no longer exists).
- All EOSdash pages: remove w-screen from components.Page (horizontal
  scrollbar).
- Solution chart: energy is the main axis; the always empty power axis is
  only shown with power columns. Typo "Electricty" fixed.

Features:
- EMS plan timeline per device, plan table as collapsible section.
- Solution chart rework: KPI row, legend, totals view, value axes for the
  displayed columns only, units menu, currency from the timezone, aligned
  time axes with the timeline, themed tooltips, system font.
- Per-column and per-command settings: visibility, alias, color, style;
  device aliases.
- New config section eosdash.plan (server/dash/dashsettings.py) stores the
  plan page settings in the EOS configuration; docs regenerated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: SchaafAlexander <86607129+SchaafAlexander@users.noreply.github.com>

docs/_generated/configexample.md

@@ -183,6 +183,21 @@
            "mode": "OPTIMIZATION",
            "notify_url": null
        },
+       "eosdash": {
+           "plan": {
+               "visible": {},
+               "alias": {},
+               "color": {},
+               "style": {},
+               "width": {},
+               "line_dash": {},
+               "device_alias": {},
+               "plan_table_open": false,
+               "energy_kwh": true,
+               "factor_percent": true,
+               "price_minor_unit": true
+           }
+       },
        "feedintariff": {
            "direct_marketing_enabled": false,
            "provider": "FeedInTariffFixed",