feat: transport driver orientation from config.yaml - default 0 rotation.

[caveman99]

This is needed for meshtasticd to specify framebuffer orientation from the confg.yaml.

Summary by CodeRabbit

• New Features
  • Added support for configuring framebuffer display rotation through the MESHTASTIC_FB_ROTATION environment variable.
  • Rotation values are constrained to supported orientations for consistent display behavior.

[coderabbitai]

📝 Walkthrough

Walkthrough

Framebuffer initialization now reads MESHTASTIC_FB_ROTATION, parses its integer value, constrains it to LVGL rotation values, and applies the rotation after framebuffer setup.

Changes

Framebuffer rotation

Layer / File(s)	Summary
Environment-driven rotation setup source/graphics/driver/FBDriver.cpp	FBDriver::init reads MESHTASTIC_FB_ROTATION and applies the masked rotation through LVGL when non-zero.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Poem

I’m a rabbit with a spinning screen,
Four neat turns in a framebuffer dream.
An env var hops, the pixels align,
LVGL twirls them right on time.
Squeak—rotation is fine!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title captures the main theme of framebuffer orientation and default rotation, which matches the PR's intended change.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@source/graphics/driver/FBDriver.cpp`:
- Around line 39-44: Update the MESHTASTIC_FB_ROTATION parsing in the
framebuffer rotation initialization to accept only values 0 through 3, removing
the rot & 3 masking behavior. Map each valid value explicitly to its
corresponding lv_display_rotation_t constant, while malformed or out-of-range
values fall back to 0° or emit a warning.

🪄 Autofix (Beta)

❌ Autofix failed (check again to retry)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 6709c46e-417f-43d7-85b9-df760a4afd17

📥 Commits

Reviewing files that changed from the base of the PR and between ef573c3 and 0f23495.

📒 Files selected for processing (1)

• source/graphics/driver/FBDriver.cpp

[coderabbitai]

Note

Autofix is a beta feature. Expect some limitations and changes as we gather feedback and continue to improve it.

An unexpected error occurred while generating fixes: Repository rule violations found

Required status check "Trunk Check Runner" is expected.

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