v2026.7.0-beta3

Fixes on top of v2026.7.0-beta2, all reported by @Megalos (thanks!).

Fixed

• 🐛 Downloading the diagnostics file broke the integration: the panel tabs stopped loading (#758). The diagnostics code mutated the live integration data (it removed the coordinator and redacted the API key in place). It now builds a separate snapshot and leaves the running integration untouched. If you hit this on an earlier build, reload the integration (or restart Home Assistant) to recover.
• 🪣 The "new bucket value" explanation under Zones > Information showed a max(0, ...) form even in the deficit case, so it read like max(0, ...) = <negative> (#757). The calculation was correct (a negative bucket is a water deficit); only the displayed formula was wrong, now fixed to match the actual computation.
• 🔢 Zero values (for example a 0.0 average temperature or precipitation) showed as "-" instead of "0.0" in the watering calendar and weather records (#755). A real 0 is now shown, and "-" is reserved for genuinely missing data.

Updating

This is a pre-release. Update Smart Irrigation to v2026.7.0-beta3 in HACS and restart Home Assistant.