v1.2.0 — Multi-zone climate 🏠🌡️

Multi-zone climate is here. If you have room thermostats (ETRVs) on an EasyControl CT200, every zone now becomes its own climate entity named after its room — instead of the single zn1 this integration polled before.

Confirmed on two multi-zone installs before release: @jfhautenauven (12 ETRVs) and @janfuu-cpu (5 ETRVs), who between them found every regression fixed below. Thank you both. 🙏

Added

• Multi-zone climate discovery (POINTTAPI) — the coordinator walks the /zones listing instead of hardcoding /zones/zn1; one climate entity per discovered zone, each device named after its room (#11).
• Localized entity names and states in all 7 supported languages (en/de/fr/it/nl/pl/sk) — including diagnostic states (blocking error false → "No error" / "Pas d'erreur" / "Kein Fehler"). Contributed by @jfhautenauven (#13).
• Per-zone valve position sensors — one per zone instead of zn1 only. Contributed by @jfhautenauven (#14).
• Open-window detection per zone — an enable switch and a window binary sensor, created only when the appliance advertises openWindowDetection for that zone. Contributed by @jfhautenauven (#14).
• WiFi firmware version and energy-efficiency sensors — the latter only on gateways that advertise /gateway/ui/eco. Supply temperature, return temperature (new) and modulation are regular sensors now instead of diagnostics. Contributed by @jfhautenauven (#15).
• Select robustness — unknown API values mark the select unavailable instead of showing a ghost state; unsupported options are rejected on write. Contributed by @jfhautenauven (#14).

Fixed

• Zone device names are human-readable — the PointT API base64-encodes room names; they're decoded now (Rmx1ci9aZW50cmFsZQ== → Flur/Zentrale). Contributed by @jfhautenauven (#12).
• The master zone is named after its room on multi-zone installs — zn1 kept the bare legacy "Heating Zone" name while every other zone showed a room name, which read as the room being missing (#11). Single-zone installs keep "Heating Zone" unchanged.
• No ghost solar entities on non-solar installations — solar sensors are only created when a solar resource reports a real, available value, and stale solar registry entries from earlier versions are removed on reload. Contributed by @jfhautenauven (#12, #13).

Removed

• Firmware-update-state sensor — redundant with the update entity. Existing installs keep an orphaned registry entry; delete it once by hand.

⚠️ Breaking

• Thermal disinfect weekday select states are lowercase (Mo → mo, …) so Home Assistant can translate them. Automations calling select.select_option with the old capitalized values must switch to lowercase; the value written to the Bosch API is unchanged (#13).

Upgrading

Update via HACS, then reload the integration once so zone devices pick up their room names.

What's next

Per-thermostat telemetry — battery, signal strength, assigned program per zone — is built and in beta as 1.3.0-beta.1 (#16, #17). It's held out of this stable release because it hasn't been confirmed on real multi-zone hardware yet. If you'd like to help, switch HACS to beta and report on #16.

Full Changelog: v1.1.0...v1.2.0