v0.3.4 — Quick replies, auto-GPS refresh, companion advert + fixes

Added

• Auto-refresh contact GPS — keeps the map markers / convo-list badges of contacts who don't broadcast
  their own location fresh, by quietly re-requesting telemetry GPS before the cached fix goes stale. Throttled
  (one request per scan, respects the EU duty cycle, yields to manual requests) and self-limiting (stops asking
  a contact that doesn't answer). New setting messaging.auto_telemetry, default on, can be disabled.
• Per-conversation quick replies — any contact, channel, or room can carry its own canned list (max 8)
  that overrides the global quick-reply list for that chat only; leave it empty to fall back to the global
  list. Editable per card in the config tool. Turns a conversation into a command menu — e.g. a Home Assistant
  / automation bridge ("Open gate", "Lights on", "Status?").
• Last-known location persists across reboots — the most recent GPS fix is saved to SD
  (/mclite/last_location.json, throttled) and restored on boot, so the map opens to your last position
  without waiting for a fresh fix (@jason-s13r, #10).
• Advertise from the companion app — the MeshCore phone/desktop app's Advertise button now works while
  connected (BLE/WiFi/USB); previously it was rejected as an unsupported command. Honours the app's flood vs
  local (zero-hop) option. The on-device advert button and the automatic periodic advert are unchanged.

Changed

• The device-info / admin screen is now fully localized — every row label routes through the translation
  table (de/fr/it) (@jason-s13r, #9).
• Conversation history now loads only the most recent max_history_per_chat messages per chat at boot
  (previously the whole file was loaded into RAM). Bounds memory if a history file is larger than the cap —
  e.g. after lowering the setting. No visible change; the runtime cap was already in place.

Fixed

• Telemetry retry is no longer cancelled by the contact-info pop-up's own timeout when the mesh's outbound
  queue is busy (the two timers now stay in lockstep) — the retry fires under congestion as intended.
• Closing the contact-info pop-up now cancels its in-flight telemetry retry, so no stray flood request goes
  out for a pop-up you already closed.
• Muting a chat is now absolute: it silences notifications even for a contact flagged always_sound
  (always_sound still overrides global mute, unchanged).
• Messages that exceed the 160-byte limit (e.g. emoji or accented/non-Latin text — which can be ≤160
  characters but more bytes) are now refused with a "Message too long" toast that keeps your text, instead
  of silently failing to send while still drawing a (failed) bubble.
• A timed-out telemetry request now releases the radio's single telemetry slot when the exchange ends
  (previously the slot stayed held after a no-response request). Without this, auto-refresh contact GPS
  would stall for the rest of the session after the first contact that didn't answer, and slow/multi-hop
  contacts could be backed off too eagerly; both are resolved.
• Auto-refresh no longer lets a single un-sendable contact block the rest of the round-robin, and
  max_history_per_chat: 0 now consistently means "unlimited" on both load and prune (previously prune at 0
  would wipe the conversation).