Add mail-client keyboard shortcuts to inbox mine tab

j/k navigate up/down, a to archive, U to mark unread, r to mark read,
Enter to open. Includes server-side DELETE /issues/:id/read endpoint
for mark-unread support on issues.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/routes/issues.ts

@@ -713,6 +713,38 @@ export function issueRoutes(db: Db, storage: StorageService) {
     res.json(readState);
   });
 
+  router.delete("/issues/:id/read", async (req, res) => {
+    const id = req.params.id as string;
+    const issue = await svc.getById(id);
+    if (!issue) {
+      res.status(404).json({ error: "Issue not found" });
+      return;
+    }
+    assertCompanyAccess(req, issue.companyId);
+    if (req.actor.type !== "board") {
+      res.status(403).json({ error: "Board authentication required" });
+      return;
+    }
+    if (!req.actor.userId) {
+      res.status(403).json({ error: "Board user context required" });
+      return;
+    }
+    const removed = await svc.markUnread(issue.companyId, issue.id, req.actor.userId);
+    const actor = getActorInfo(req);
+    await logActivity(db, {
+      companyId: issue.companyId,
+      actorType: actor.actorType,
+      actorId: actor.actorId,
+      agentId: actor.agentId,
+      runId: actor.runId,
+      action: "issue.read_unmarked",
+      entityType: "issue",
+      entityId: issue.id,
+      details: { userId: req.actor.userId },
+    });
+    res.json({ id: issue.id, removed });
+  });
+
   router.post("/issues/:id/inbox-archive", async (req, res) => {
     const id = req.params.id as string;
     const issue = await svc.getById(id);

server/src/services/issues.ts

@@ -791,6 +791,20 @@ export function issueService(db: Db) {
       return row;
     },
 
+    markUnread: async (companyId: string, issueId: string, userId: string) => {
+      const deleted = await db
+        .delete(issueReadStates)
+        .where(
+          and(
+            eq(issueReadStates.companyId, companyId),
+            eq(issueReadStates.issueId, issueId),
+            eq(issueReadStates.userId, userId),
+          ),
+        )
+        .returning();
+      return deleted.length > 0;
+    },
+
     archiveInbox: async (companyId: string, issueId: string, userId: string, archivedAt: Date = new Date()) => {
       const now = new Date();
       const [row] = await db