Implement partial refreshing protocol#21

Draft

LordMike wants to merge 23 commits intoOpenDisplay:mainfrom

LordMike:feat/partial-rendering

Commits on Apr 24, 2026

Add panel mapping for GDEM133T91 960x680 (panel_ic_type 0x0049)

LordMike
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claude
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Fix GDEM133T91 panel_ic_type to 0x0042

LordMike
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claude
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Commits on Apr 25, 2026

Add partial-rendering protocol constants and etag RTC storage

LordMike
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claude
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Implement 0x76 partial image data handler and etag flow on 0x70/0x72

LordMike
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claude
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Wire 0x76 partial image data into BLE command dispatch

LordMike
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claude
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Trim partial-rendering changeset: drop chatter and whitespace churn

LordMike
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claude
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Rename framebuffer_etag → displayed_etag and drop ESP32-only guards

LordMike
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claude
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Move partial rendering to versioned 0x76/0x77 protocol
LordMike
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Commits on Apr 26, 2026

Add compressed partial update segments
LordMike
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Commits on Apr 27, 2026

Commits on Apr 28, 2026