Fix | Minimum Speaker Requirement not Enforced

[matiasperrone-exo]

Task:

Ref: https://app.clickup.com/t/86b7pq79y

Summary of Changes

Problem

The speaker validation on the presentation speakers form only checked whether at least one speaker existed, ignoring the min_speakers and max_speakers constraints configured on the event type.

Changes

src/components/presentation-speakers-form.js

• Replaced the simplistic boolean validSpeaker check with proper min/max validation using entity.type.min_speakers and entity.type.max_speakers.
• Added context-aware error messages that vary based on the constraint type:
  • Range (min ≠ max, finite max) → "between {min} and {max}"
  • Minimum only (infinite max) → "at least {min}"
  • Exact match (min = max, >1) → "add {min} speakers"
  • Exactly one (min = max = 1) → "add one speaker"
• Made the missing_speaker error message use the tenant-configurable speaker label instead of a hardcoded string.
• Removed unused getMarketingValue import.
• Refactored early-return pattern for cleaner control flow.

src/i18n/en.json

• Replaced the single add_speaker error key with four granular keys: add_speakers, add_only_one_speaker, add_exact_number_of_speakers, add_min_number_speakers.
• Updated missing_speaker to accept a {speaker} parameter.

src/i18n/zh.json

• Added a new errors block with Chinese translations matching all the new English error keys.
• Removed the now-unused add_speaker_error key.

[santipalenque]

LGTM

[martinquiroga-exo]

@matiasperrone-exo please see comments

[matiasperrone-exo]

@martinquiroga-exo please review

approved by reviewer