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**Category:** fix **User Impact:** The sidebar now presents unread activity consistently: unread rooms are bold, offscreen activity is counted by destination, and DMs or directed activity receive stronger emphasis. **Problem:** Sidebar unread state was split across competing signals: agent work could trigger overflow, message totals inflated its count, non-DM rows showed redundant numerals, and routine room activity looked as urgent as DMs or directed messages. This made the sidebar noisy and made the overflow value harder to interpret. **Solution:** Use one stable offscreen unread control that counts rooms and DMs—not messages—and remove agent work from that signal. Keep ordinary room activity quiet; promote DMs, mentions, broadcasts, and relevant thread replies; preserve DM avatars and targeting; bold every unread room; and retain thread dots while removing non-DM numerals. <details> <summary>File changes</summary> **desktop/src-tauri/src/unread_catch_up.rs** Classifies relevant thread replies as priority activity during native unread catch-up so startup state matches live rendering. **desktop/src/app/AppShell.tsx** Passes the priority unread destination set into the sidebar. **desktop/src/features/channels/useUnreadChannels.ts** Projects unread destinations, priority state, and thread replies consistently while keeping Dock badge behavior separate from sidebar emphasis. **desktop/src/features/sidebar/lib/useOffscreenActivityChannelIds.test.mjs** Removes tests for the superseded agent/activity overflow projection. **desktop/src/features/sidebar/lib/useOffscreenActivityChannelIds.ts** Removes the old agent-plus-message overflow projection so agent work alone no longer creates the unread indicator. **desktop/src/features/sidebar/lib/useSidebarActivityOverflow.ts** Replaces activity-volume overflow state with unread-destination overflow state. **desktop/src/features/sidebar/lib/useSidebarUnreadOverflow.test.mjs** Covers priority detection and destination-count labels for the new overflow projection. **desktop/src/features/sidebar/lib/useSidebarUnreadOverflow.ts** Counts distinct offscreen unread destinations and determines quiet versus primary treatment per direction. **desktop/src/features/sidebar/ui/AppSidebar.tsx** Renders one stable overflow control, preserves protected-DM visibility filtering, and prioritizes visible unread DMs for previews and navigation. **desktop/src/features/sidebar/ui/AppSidebar.types.ts** Adds the priority unread destination set to the sidebar contract. **desktop/src/features/sidebar/ui/CustomChannelSection.tsx** Stops forwarding non-DM unread counts into custom channel rows. **desktop/src/features/sidebar/ui/MoreUnreadButton.test.mjs** Updates control coverage for explicit emphasis, destination labels, and DM targeting. **desktop/src/features/sidebar/ui/MoreUnreadButton.tsx** Applies quiet or primary treatment without changing geometry, accessibility text, DM avatars, or click behavior. **desktop/src/features/sidebar/ui/SidebarSection.tsx** Removes non-DM row numerals while retaining unread weight and thread preview affordances. **desktop/src/shared/ui/UnreadPill.tsx** Shares one composition between quiet and primary states so only color treatment changes. **desktop/tests/e2e/badge.spec.ts** Covers destination counting, promotion without count inflation, DM/thread priority, row bolding, and removed numerals; also captures the reviewed UI states. **desktop/tests/e2e/channel-activity-popover.spec.ts** Updates channel activity assertions for the numeral-free row treatment. **desktop/tests/e2e/channels.spec.ts** Updates channel unread expectations to use bold text rather than a row count. **desktop/tests/e2e/thread-unread.spec.ts** Keeps thread unread-dot and popover coverage while asserting the room itself is bold. </details> ## Reproduction steps 1. Open a workspace with enough sidebar destinations to scroll rooms above or below the viewport. 2. Receive ordinary unread activity in an offscreen room; verify one quiet `N unread` indicator appears and counts the room once regardless of message volume. 3. Receive a mention, broadcast, or relevant thread reply in an offscreen room; verify the same count becomes primary without changing its geometry or adding a badge. 4. Receive an unread DM, including thread-only activity; verify the indicator is primary, shows the DM avatar when available, and navigates to that DM. 5. Scroll the destination onscreen or mark it read; verify the count and treatment update from the remaining offscreen destinations. 6. Inspect unread non-DM rows; verify their names are bold, numeric badges are absent, and thread dots still open the unread-thread preview. ## Screenshots ### Ordinary unread room Routine offscreen room activity uses the quiet treatment.  ### Directed unread activity The same destination count becomes primary when an offscreen room has directed activity; geometry and label remain unchanged.  ### Thread-only unread DM A DM stays primary and retains its avatar even when only its thread has unread activity.  --------- Signed-off-by: Taylor Ho <taylorkmho@gmail.com> Co-authored-by: Rizz <302abe414ca6e3134763d2539bfcf145aea2a63fe5f8455204ed602fd40cf381@buzz.block.builderlab.xyz> Co-authored-by: Carl <acda9e433d19dcd0e6b6840f7f4b98f3a56f1fab98049d444c087019e6d36560@buzz.block.builderlab.xyz>