Tapping signal/battery in header now also shows device's own telemetry
(temperature, humidity, pressure, GPS) when available. Triggers a self
telemetry request on sheet open. Data comes from the device contact's
telemetry field.
Tapping the signal bars or battery indicator in the header now shows
a bottom sheet with device details: BLE signal (dBm), battery %,
voltage, storage usage, firmware version, frequency, and TX power.
Fixes#22 (partial — device telemetry display)
Room servers forward messages with the original author's 4-byte public
key prefix (roomPostAuthorPrefix). Was ignoring this — all room messages
showed the room server's name as sender.
Now resolves the actual poster's name from roomPostAuthorPrefix by
matching against the contacts list. Falls back to room server name if
the author isn't a known contact.
Also fixes findContactByPrefix to accept 4-byte prefixes (was rejecting
anything shorter than 6 bytes).
Fixes#22
Channel chip (ch2) was inline with the label, stealing horizontal
space and causing label truncation ('Temper...'). Now positioned as
a tiny 9px label anchored bottom-right of the tile, giving the full
width to the metric label and value.
DeviceKey resolver was falling back to deviceId when publicKey wasn't
yet available during early connection. This created two different keys
(id:xxx then pk:yyy) for the same device, causing a new profile to be
created each time.
Now returns null until publicKey is available, so profile sync waits
for the stable identifier.
Core telemetry fields (temperature, humidity, pressure, voltage) were
shown twice: once from the ContactTelemetry top-level fields and again
from extraSensorData channel-keyed entries (e.g. temperature_2).
Now skips extraSensorData keys that are already represented by core
telemetry cards.
