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End-to-end delivery indicators on the device UI, drawn next to outgoing messages and auto-scaled to the font (legible on landscape e-ink). DM (and room servers, which share the DM path): - Pending / delivered / failed marker driven by the real end-to-end ACK. Pending shows a row of dots — one per send — so auto-resend progress is visible before it resolves to ✓ / ✗. - Auto-resend: new pref dm_resend_count (0-5, default 2), Settings › Messages › Resend. A pending DM whose ACK times out is re-sent (reusing the original timestamp) until resends run out, then ✗. Driven from UITask::loop so it completes in the background, independent of screen. - Incoming dedup: a retry reuses the sender timestamp + text but carries a fresh packet hash, so addDMMsg drops copies matching prefix+ts+text. Channels (flood, no recipient ACK): - ✓ only once a repeater echo confirms the send was relayed into the mesh; no echo is normal, not a failure (no pending/fail shown). A small ring tracks a burst of sends so each matches its echo. Receive-path hashing is gated so the hot flood path is untouched when idle. Shared: - Markers shown in both the history list and the fullscreen message view. - Reusable scalable mini-icon facility in icons.h (bitmap + auto-scale); adding a new status icon is a bitmap plus one draw call. No changes to the upstream mesh library (src/). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>