Add song 6, Improv over BLE, and the certification fixes

[Bunton33]

Bumps the version to 26.8.25.1 so the update entity offers this to units in the field - the shared build workflow reads that substitution out of Core.yaml as the release tag.

Song 6: "Do You Want To Build A Snowman"

Double-press or hold on Song Button 2 (GPIO5) plays the Frozen chorus hook. Song 1 is already called "Snowman" but is Frosty the Snowman, a different tune, so this one is named BuildASnowman to keep the two apart in the rtttl logs. 105 chars, 34 notes, 11.9s, well inside the ~254 byte NVS preference.

Button 2 moves from a plain on_release to the same on_multi_click set buttons 1 and 3 use, and the deep-sleep wake decoder gets the matching hold-confirm path. A double-press cannot survive deep sleep - boot from the ext1 wake outlasts the two clicks and ext1 gives a latched pin mask with no click count

• so the hold is what makes the gesture work asleep, exactly as on the other two buttons. Button 2 gives up its zero-latency wake path for this.

Also adds a Snowfall LED effect so song 6 has its own look, clock-driven rather than positional for the same reason PinkParty is.

Improv over BLE

esp32_improv was the one hard Made for ESPHome requirement the config was missing. It costs +432 B RAM and +21 KB flash here because esp32_ble is already linked in for the Bluetooth proxy, and it stops itself once wifi connects, so a provisioned unit never advertises.

Certification and entity quality

• api: bare encryption: with no key, so Noise support is compiled in without putting a secret in a public config. An adopting client supplies the key.
• ids on the singleton components (api, logger, web_server, captive_portal, improv_serial, safe_mode, http_request, bluetooth_proxy) so adopters can !extend and !remove them.
• esp32_ble_tracker scan_parameters continuous: false. The tracker starts a scan in its own setup(), before the on_boot -300 handler reads the proxy switch, so a fresh unit scanned briefly with the switch off - in the same window Improv needs to advertise.
• Restart, Restart (Safe Mode) and Factory Reset buttons. Factory reset was internal: true, so a 10s button hold was the only way to clear a unit.
• wifi_info and version diagnostics, all disabled_by_default.
• entity_category on Song Button 1/2/3, Wake-up Button Pressed, OTA Mode and Volume; they were landing on users' dashboards.
• The template button was renamed to "Reinstall Firmware" - the update entity already had the name "Firmware Update".
• api services: -> actions:, and device_class: firmware on the update entity.

Bug fixes found along the way

• A malformed RTTTL string left all 37 LEDs on at 80% forever. The play scripts light up before rtttl.play, which returns early on a parse error without ever reaching RUNNING, so on_finished_playback never fired. Song Text is user-editable, so one typo stranded the ornament lit.
• Sleep Duration min_value was 0, but the on_value lambda refuses 0, so setting it left the entity reading "0 h" while the device kept sleeping for its previous duration.
• swallow_clear and sleep_grace_period defaulted to mode: single, which discards a re-arm instead of restarting the window.
• A stray ';' on songs 2 and 3 parsed as a rest, appending a silent quarter note to each.

Verified with a clean build on esphome 2026.7.3: H-3 at RAM 47.3% / flash 51.0%, H-3D at RAM 18.6% / flash 8.5%.

Version:

What does this implement/fix?

Types of changes

• Bugfix (fixed change that fixes an issue)
• New feature (thanks!)
• Breaking change (repair/feature that breaks existing functionality)
• Dependency Update - Does not publish
• Other - Does not publish
• Website of github readme file update - Does not publish
• Github workflows - Does not publish

Checklist / Checklijst:

• The code change has been tested and works locally
• The code change has not yet been tested

If user-visible functionality or configuration variables are added/modified:

• Added/updated documentation for the web page

[coderabbitai]

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