feat: aggregate five Tasmota plugs with cost and daily historyHEADmaster

Proxy Tasmota energy JSON into Homepage's customapi widget, which can
render JSON but cannot do arithmetic. Applies the tariff, sums across
plugs, and records the per-day history the plugs do not keep.

Plugs are fetched in parallel; sequential polling would stack five
timeouts into a 25s hang. An offline plug is reported rather than
counted as zero, so a dead sensor cannot read as "consumed nothing".

Tasmota exposes only Today/Yesterday/Total, so each poll writes
yesterday's finished kWh into SQLite keyed (day, plug), making repeat
polls and restarts idempotent.

Display strings are preformatted server-side: Homepage's locale
formatting renders 1593 W as an ambiguous "1,593", and its widget has
no columns, so pairing kWh with its cost in one value is what keeps
the cards compact.

1 files changed, 21 insertions, 0 deletions

diff --git a/homepage-settings.yaml b/homepage-settings.yaml
new file mode 100644
index 0000000..095b03b
--- /dev/null
+++ b/homepage-settings.yaml
@@ -0,0 +1,21 @@
+# Merge this `layout:` block into Homepage's settings.yaml.
+#
+# The layout block controls rows. `style: row` + `columns:` puts a group's
+# services side by side on one row; without it they stack in a column.
+# Listing every group also fixes their order on the page, so groups you
+# already have must appear here too, or they fall to the bottom.
+
+layout:
+  Consumi:
+    style: row
+    columns: 1        # single full-width card: the total gets its own row
+  Prese:
+    style: row
+    columns: 5        # the 5 plugs side by side on the row below
+
+  # Your other groups go here too. Any group omitted from this block falls to
+  # the bottom of the page, so list them all in the order you want them shown:
+  #
+  # Nome Gruppo:
+  #   style: row
+  #   columns: 3