svi-252b: set night mode transition delay

[ArthurKoba]

Follow-up to #161 and OpenIPC/majestic#325.

Tested the updated Majestic on the physical SpezVision SVI-252B K202
(HI3516CV200 + IMX323).

With transitionDelayMs: 0, the day -> night transition is now clean and
the previously reported purple/magenta flash is gone.

On night -> day, a very brief purple frame was still visible while the
bistable IR-cut filter was returning to the daylight position.

Setting:

nightMode:
  transitionDelayMs: 150

removes the remaining flash. With 150 ms, both day -> night and night -> day
transitions are clean on this hardware.

This sets transitionDelayMs to 150 ms as the device-specific default for
the SpezVision SVI-252B K202.

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PR Summary by Qodo

Set SVI-252B night mode transition delay to 150 ms

🐞 Bug fix ⚙️ Configuration changes 🕐 Less than 5 minutes

AI Description

• Adds a hardware-specific 150 ms delay for IR-cut filter transitions.
• Prevents purple frames during day-to-night and night-to-day mode changes.

High-Level Assessment

The device-specific delay is the appropriate approach because it matches the SVI-252B's bistable IR-cut timing without affecting other hardware. A zero delay was physically tested and left a night-to-day artifact, while a global default would risk regressions across devices.

Files changed (1) +1 / -0

Bug fix (1) +1 / -0

customizer.shConfigure a 150 ms night mode transition delay +1/-0

Configure a 150 ms night mode transition delay

• Sets Majestic's device-specific night mode transition delay to 150 ms. This allows the bistable IR-cut filter to settle before video resumes, preventing brief purple frames in both transition directions.

devices/hi3516cv200_lite_spezvision-svi-252b-k202/general/overlay/usr/share/openipc/customizer.sh

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[ArthurKoba]

@openipc-ai Could you please take a quick look at this follow-up PR?

Majestic #325 has now been hardware-tested on the SVI-252B and closed. The 150 ms transition delay fixes the remaining night -> day purple flash, and this PR only carries that confirmed value into the device profile.

Thanks.

[ArthurKoba]

@openipc-ai Small follow-up to the SVI-252B profile: this only corrects the remaining comment about backlightPin. Hardware confirms that the IR illuminator is switched autonomously by the daylight-sensor circuitry, so there is no SoC-controlled backlight GPIO to resolve or configure.

PR: #165