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[Feature Request] Client-side warning / confirmation prompt when sending frequent messages (Anti-spam UI) #3053

Description

@jranma

Summary

Add an anti-spam safety confirmation in the client application (UI) when a user tries to send more than X messages within a short timeframe (e.g., per minute/hour), warning them about mesh network congestion.

Is your feature request related to a problem? Please describe.

New or unaware users often send multiple consecutive text messages or test prompts without realizing LoRa networks have limited airtime and duty-cycle constraints. Relying solely on repeater-level drop mechanisms (#1502) means messages silently fail without feedback to the sender.

Proposed Solution

Implement a rate-monitor inside the companion client UI:

  1. Track outgoing message count over a sliding window (e.g., 5 messages in 1 minute, or 20 messages in an hour).
  2. If threshold $X$ is exceeded, display a confirmation dialog before transmitting:

    "You have sent several messages in a short period. Frequent transmissions congest the mesh network for everyone. Are you sure you want to send this?" [Send Anyway] / [Cancel]

  3. Optionally allow power users to adjust or disable this threshold in settings.

Additional Context

  • Prevents accidental channel flooding at the user input level before packets hit the radio.
  • Educates users on good mesh etiquette without hard-blocking legitimate emergency communications.

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