Copy and helper text updates on threshold percents

[jeffpaul]

Is your enhancement related to a problem? Please describe.

Improve the clarity of the "Threshold (%)" setting by updating the label to "Confidence Threshold (%)" and adding helper text that explains the impact of higher vs. lower values. This will hopefully help non-technical users understand that a higher % yields more precise, limited suggestions, while a lower % returns more but potentially noisier results.

Designs

New label and helper text:

Confidence Threshold (%)
ℹ️ Determines how confident the AI must be before suggesting a term.

Higher % = More precise (fewer, more accurate terms)
Lower % = More verbose (more suggestions, including lower-confidence terms)

Where to place this:

• Directly below each threshold % input field.
• Optionally include a small tooltip icon (ℹ️) next to the label to expand/collapse this explanation if space is tight.

It may be even further helpful to not what our suggested defaults are (especially in cases where folks have adjusted those and want to reset back to defaults, eg.:

• Category: Suggested default = 50%
• Keyword & Entity: Suggested default = 70%

Describe alternatives you've considered

No response

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