Summary

• Direct Messages moved to the top of the left rail, restyled from a small 20px footer icon to a 48px speech-bubble tile that matches the space (server) icons — Discord-style — with a divider separating it from the space list.
• Member roster context menu (right-click / long-press) with quick utilities: View Profile, Direct Message (hidden for yourself), Copy User ID, Copy Username. Moderation deliberately stays in the tap-to-open profile popout; the menu uses the app's existing showMenu pattern.
• Direct Message action added to the member popout (modal) as well, for non-self users.
• New openAccordDirectMessage(context, ref, userId) helper creates-or-opens the 1:1 DM via the idempotent users.createDm({recipients:[id]}) and opens the DM dialog straight into that conversation. showAccordDirectMessages gained an optional initialChannel to support this.

Why

The DM entry point was a hard-to-spot icon at the bottom of the rail, and members had no right-click affordance. This brings both in line with the reference client / Discord conventions and makes starting a DM a one-click action from a member's row or profile.

Reviewer notes

• "Mention in composer" was intentionally left out of the quick menu: the message composer (_Composer) is private with a self-owned controller and no external injection hook, so wiring it would require new cross-cutting plumbing. Easy follow-up if wanted.
• DM open relies on users.createDm being idempotent for a single recipient (returns the existing channel). When opened from the popout, the DM dialog stacks over it rather than replacing it.
• flutter analyze --no-fatal-infos is clean on all four changed files. Not smoke-tested in a running app — worth a manual check of right-click → Direct Message and the popout's new button.

Test plan

• DM tile appears at the top of the rail, sized like a space icon, opens the DM panel.
• Right-click (and long-press) a member row → menu shows; each item works; copy items toast.
• "Direct Message" from both the context menu and the popout opens the correct 1:1 conversation (existing or freshly created).
• "Direct Message" is hidden when targeting yourself.

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