Update CAST-1 docs for the unified firmware

[bharvey88]

CAST-1 PR #72 combined the WiFi and Ethernet firmware into one image, released as 26.8.26.7. The wiki still told people to pick a variant and reflash to move between them, and pointed at entities that no longer exist.

What changed

• Getting Started: the Ethernet tab loses the "flash yours over to Ethernet first" step. Fit the module, plug the cable in, confirm with the new Network Connection sensor.
• Switch Firmware page deleted, along with its nav entry. There is nothing left to switch between. The CAST-1 is not on sale yet, so no redirect is needed.
• Ethernet Module: no firmware step after fitting the board.
• FAQ: the Ethernet answer now explains dual-homing (Ethernet and WiFi up at once so Home Assistant keeps the device), the fallback to WiFi when the cable comes out, and the hotspot staying off while wired.
• Sensor Definitions: the Firmware Type select is gone from the firmware, so its row goes too. IP Address is replaced by Network Connection, Ethernet IP Address and WiFi IP Address.
• Reflash: no Variant to select. The installer already collapsed CAST-1 to one firmware in installer PR #31.
• Reset WiFi Credentials: the "WiFi firmware only" note becomes "unplug the Ethernet cable first", which is what the firmware actually does now.
• WizMote: the channel-scan note still applies, but keys off a CAST-1 running Ethernet with no WiFi network rather than a firmware variant.

Verified against a local mkdocs serve: annotations render as real markers, the Ethernet Module front matter parses, and the deleted page 404s with its nav entry gone.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated CAST-1 Ethernet setup instructions to explain automatic wired-connection detection without firmware switching.
  • Clarified Ethernet and Wi-Fi behavior, including simultaneous connectivity, automatic fallback, and hotspot availability.
  • Added guidance for using the Network Connection, Ethernet IP Address, and Wi-Fi IP Address sensors.
  • Updated pairing and troubleshooting guidance for Ethernet-only setups.
  • Removed obsolete firmware-switching instructions and navigation links.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ee82a9a3-d75d-4e67-a25f-8664d7d80aa0

📥 Commits

Reviewing files that changed from the base of the PR and between 5f98b96 and 51097ba.

📒 Files selected for processing (9)

• docs/products/cast1/addons/ethernet-module.md
• docs/products/cast1/examples/wizmote-blueprint.md
• docs/products/cast1/faq.md
• docs/products/cast1/setup/cast1-switch-firmware.md
• docs/products/cast1/setup/getting-started.md
• docs/products/cast1/setup/sensor-definitions.md
• docs/products/cast1/troubleshooting/cast1-reflash.md
• docs/products/cast1/troubleshooting/cast1-reset-wi-fi-credentials.md
• mkdocs.yml

---

Walkthrough

CAST-1 documentation now describes automatic Ethernet detection, simultaneous Ethernet and Wi-Fi states, updated network sensors, cable-dependent hotspot behavior, and setup without firmware switching.

Changes

CAST-1 Ethernet behavior

Layer / File(s)	Summary
Document automatic Ethernet behavior docs/products/cast1/addons/ethernet-module.md, docs/products/cast1/faq.md, docs/products/cast1/examples/wizmote-blueprint.md	The documentation describes automatic wired connection detection, Network Connection states, Ethernet-only pairing behavior, and support contact information.

|Update setup and sensor references
docs/products/cast1/setup/getting-started.md, docs/products/cast1/setup/sensor-definitions.md|Ethernet setup no longer includes firmware flashing. Verification uses the Network Connection sensor. Diagnostic entities now include separate Ethernet and Wi-Fi IP addresses.|

|Remove legacy firmware guidance
docs/products/cast1/setup/cast1-switch-firmware.md, docs/products/cast1/troubleshooting/cast1-reflash.md, docs/products/cast1/troubleshooting/cast1-reset-wi-fi-credentials.md, mkdocs.yml|The firmware-switch page and navigation entry were removed. Reflash and Wi-Fi credential instructions no longer reference separate firmware variants.|

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

Poem

I’m a rabbit with cables neatly spun,
Ethernet joins Wi-Fi in the sun.
No firmware dance, no flashing fright,
Network sensors name the path just right.
Unplug the cord for hotspot light!

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch cast1-unified-firmware

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