Typing a value with its unit ("-6 dB", "500 ms", "50%") into a host's parameter field resets the parameter to its default #17

What's wrong

EffectAudioParameter.FromString accepts only a bare invariant-culture number. Any other text returns the parameter's default:

Hosts call this when a user types into a generic editor or an automation-lane value box. Users naturally type the unit the host displays next to the value, and a typo lands here too.

Observed

On the Gain parameter, whose default is 0 dB:

FromString("-6")    -> -6.00 dB
FromString("-6 dB") ->  0.00 dB   (reset to default)
FromString("-6dB")  ->  0.00 dB   (reset to default)
FromString("abc")   ->  0.00 dB   (reset to default)

Delay Time behaves the same way: "500 ms" jumps to the 250 ms default. So does Mix: "50%" jumps to its default. The user's current setting is silently thrown away, and automation can be written with the wrong value.

Suggested fix

• Before parsing, trim whitespace and strip the descriptor's Units suffix (and a trailing %), ignoring case.
• On a parse failure, return the parameter's current normalized value instead of DefaultNormalizedValue, so bad input leaves the value unchanged.

Acceptance criteria

• Unit tests: "-6 dB", "-6dB" and " -6 " all give -6 dB on Gain. "500 ms" gives 500 ms on Delay Time. "50%" and "50 %" give 50 on Mix.
• Unparseable input leaves the value where it was.