Keep Bluetooth Proxy on for legacy BLE builds

[bharvey88]

Version: 26.7.29.1

What does this implement/fix?

The Bluetooth Proxy switch does restore from flash, but the _OFF half of
RESTORE_DEFAULT_OFF only decides the boot where nothing is stored yet, which is
the first boot after the switch shipped. MTR-1_BLE.yaml inherited that mode from
Core, so a legacy BLE device that had always proxied comes up with the proxy off
after updating and stays that way until the user finds the switch. Reported in ApolloAutomation/MSR-2#92.

Core now reads the mode from a bluetooth_proxy_restore_mode substitution
defaulting to RESTORE_DEFAULT_OFF, and MTR-1_BLE.yaml overrides it to
RESTORE_DEFAULT_ON, the same override pattern that file already uses for its OTA
manifest URLs. The unified image is unchanged, and a user's saved choice still wins
on every later boot.

Validated with esphome config on 2026.7.2 across MTR-1.yaml, MTR-1_BLE.yaml
and MTR-1_Factory.yaml. Rendered switch: standard RESTORE_DEFAULT_OFF, BLE
RESTORE_DEFAULT_ON.

Matching PRs go to AIR-1, MSR-1 and MSR-2, which carry the identical switch and BLE variant.

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

🤖 Generated with Claude Code

Summary by CodeRabbit

• New Features

  • Added configurable Bluetooth Proxy restore behavior for device variants.
  • BLE variants restore Bluetooth Proxy to an enabled state by default, while core devices default to disabled.

• Bug Fixes

  • Improved Bluetooth Proxy and BLE scanning state restoration after updates and reboots.
  • Updated the device version to 26.8.18.1.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 305c6b43-9757-43be-820a-9722149a15df

📥 Commits

Reviewing files that changed from the base of the PR and between 5242386 and 98f5e9b.

📒 Files selected for processing (1)

• Integrations/ESPHome/Core.yaml

Included review availability: Your plan includes up to 1 review per rolling hour; 0 remain after this review.

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Walkthrough

Bluetooth Proxy restoration is configurable through Core.yaml. The MTR-1 BLE variant restores the proxy on by default. Core.yaml also updates the firmware version and boot commentary.

Changes

Bluetooth Proxy Restoration

Layer / File(s)	Summary
Restore mode configuration Integrations/ESPHome/Core.yaml, Integrations/ESPHome/MTR-1_BLE.yaml	Core.yaml defines the Bluetooth Proxy restore-mode substitution and updates boot-state commentary. The BLE variant sets it to RESTORE_DEFAULT_ON.
Switch restore wiring Integrations/ESPHome/Core.yaml	The Bluetooth Proxy switch uses the configurable restore mode. The apollo-mtr-1 firmware version is updated.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: ⚪ Minimal · up to 98f5e

This localized change keeps Bluetooth Proxy enabled by default for legacy BLE builds while preserving saved user choices; no actionable merge-blocking risk remains after normal checks and review.

Poem

A rabbit checks the proxy light,
BLE returns in mode just right.
Core sets the restore key,
The BLE variant wakes with glee.
A fresh version starts the flight.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: preserving Bluetooth Proxy activation for legacy BLE builds.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/ble-proxy-restore-on

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