feat: recover missing conversations, fix media attachment, add manual inbox tab

Missing conversations: recipient Reddit accounts that are deleted or suspended
left conversations unaccounted for. A new RecipientAccountStatusService polls
Reddit for the users behind cached conversations and records their account
status durably, with progressive backfill and delta-media fixes in ChatService
so history and images are no longer dropped mid-sync.

Media: attachMedia now surfaces download failures as MediaAttachmentError so the
sync cursor can be retried instead of silently losing an image, recognizes image
bytes when Matrix returns a generic content type, and keeps separate gallery
occurrences when the same asset appears in more than one event.

Manual inbox tab: the conversations list now carries the reply-loop status, so
the inbox can separate conversations the operator is driving by hand from the
ones automation is still handling. A Manual filter pill and a per-row chip
explain why each conversation was handed over.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

apps/dashboard/src/features/conversations/conversations-page.tsx

@@ -22,6 +22,7 @@ import {
   accountOptions,
   filterCounts,
   isUnread,
+  manualFlowLabel,
   needsReply,
   partitionConversations,
   triageStatus,
@@ -53,17 +54,41 @@ interface ConversationRowProps {
   registerRef(element: HTMLButtonElement | null): void;
 }
 
+/**
+ * A chip's visible label, plus the longer form used for screen readers and the
+ * hover tooltip when the label alone does not say why the chip is there.
+ */
+interface ConversationChip {
+  label: string;
+  hint?: string;
+  tooltip?: string;
+}
+
 /** Independent state chips. A conversation can be several of these at once. */
-function conversationChips(conversation: ActiveChat, now: number): string[] {
-  const chips: string[] = [];
-  if (isUnread(conversation)) chips.push('Unread');
-  if (needsReply(conversation)) chips.push('Needs reply');
-  else if (conversation.isFromUs && triageStatus(conversation) === 'open') chips.push('Waiting on them');
+function conversationChips(conversation: ActiveChat, now: number): ConversationChip[] {
+  const chips: ConversationChip[] = [];
+  if (conversation.recipientAccountStatus === 'deleted') {
+    chips.push({ label: 'Account deleted' });
+    return chips;
+  }
+  if (isUnread(conversation)) chips.push({ label: 'Unread' });
+  if (needsReply(conversation)) chips.push({ label: 'Needs reply' });
+  else if (conversation.isFromUs && triageStatus(conversation) === 'open') chips.push({ label: 'Waiting on them' });
+  const manualLabel = manualFlowLabel(conversation);
+  if (manualLabel) {
+    chips.push({
+      label: 'Manual',
+      hint: manualLabel,
+      tooltip: conversation.automationHandoffReason
+        ? `${manualLabel} — ${conversation.automationHandoffReason}`
+        : manualLabel,
+    });
+  }
   const status = triageStatus(conversation);
-  if (status === 'snoozed') chips.push('Snoozed');
-  if (status === 'done') chips.push('Done');
+  if (status === 'snoozed') chips.push({ label: 'Snoozed' });
+  if (status === 'done') chips.push({ label: 'Done' });
   if (needsReply(conversation) && conversationAge(conversation.lastMessageTime, now) !== 'fresh') {
-    chips.push('Overdue');
+    chips.push({ label: 'Overdue' });
   }
   return chips;
 }
@@ -82,7 +107,7 @@ function ConversationRow({
 
   const descriptors = [
     redditUsernameLabel(conversation.username),
-    ...chips,
+    ...chips.map((chip) => chip.hint ?? chip.label),
     relativeTime,
     ...(conversation.sellerDetected ? ['Seller'] : []),
     ...(conversation.hasReceivedImages ? ['Image received'] : []),
@@ -122,8 +147,12 @@ function ConversationRow({
       </button>
       <span className="conversation-list-chips">
         {chips.map((chip) => (
-          <span className={`conversation-chip is-${chip.toLowerCase().replaceAll(' ', '-')}`} key={chip}>
-            {chip}
+          <span
+            className={`conversation-chip is-${chip.label.toLowerCase().replaceAll(' ', '-')}`}
+            key={chip.label}
+            title={chip.tooltip}
+          >
+            {chip.label}
           </span>
         ))}
         {showOwner ? <AccountOwnerBadge owner={conversation.owner} /> : null}