Fix MS Teams Support#1

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anx-ag wants to merge 42 commits intomasterfrom

Commits on Mar 12, 2026

Do not double prefix the username in messages
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Support for hybrid (hook + token) mode
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Major MSTeams Overhaul - initial release
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Add @matterbridge test command for end-to-end relay testing

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Fix MM→Teams formatting, emoji mapping, and strikethrough

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Fix emoji format, strikethrough, and add nick debug logging

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Add list test steps and hostedContents image transfer for MM→Teams

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Fix Teams→MM image transfer: strip hostedContents, webhook props, hybrid upload

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Fix echo, mixed content, and GIF handling for MM→Teams file transfer

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Fix duplicate delivery, thread ID mapping, echo, and unsupported file notifications

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Fix multi-image bundling, MM thread ID mapping, and source-side notifications

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Fix deadlock: wrap b.Remote send in goroutine for unsupported file notification

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Post unsupported-file notification as thread reply with username matterbridge

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Add image tests, GIF support, priority forwarding, and persistent message cache

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Fix SetProp: use Props map directly for older Mattermost model

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Add hostedContents image relay, revert GIF support, add priority tests

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Per-bridge MessageCacheFile, override_username for API posts, fix priority tests

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Fix priority test: use simple posts (SetPostPriority not in Client4)

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rework Mattermost Message Handling, fix MessageCacheFile Handling, fix priority tests, add manual teams file transfer test
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Commits on Mar 13, 2026