Improve operator workflow QoL (#5291)

## Thinking Path

> - Paperclip is a control plane operators use repeatedly to supervise
agent companies.
> - Common operator workflows depend on fast scanning of inboxes, issue
sidebars, workspaces, cost totals, and runtime services.
> - Several small UI and service gaps made those workflows slower or
less clear.
> - This pull request groups the operator-facing QoL changes that can
stand alone from recovery and adapter work.
> - The benefit is a denser, clearer board experience for issue triage
and workspace operation.

## What Changed

- Added inbox assignee/project grouping and issue list token/runtime
totals.
- Improved issue properties with removable blocker chips and workspace
task links.
- Improved execution workspace layout, runtime controls, issues tab
default, and stopped-port reuse behavior.
- Added mobile markdown/routine dialog fixes, page title company names,
sidebar polish, and dashboard run task label cleanup.

## Verification

- `pnpm install --frozen-lockfile`
- `pnpm exec vitest run ui/src/lib/inbox.test.ts
ui/src/components/IssueProperties.test.tsx
ui/src/components/WorkspaceRuntimeControls.test.tsx
server/src/__tests__/workspace-runtime.test.ts
server/src/__tests__/costs-service.test.ts`

## Risks

- Medium UI risk because this touches several operator surfaces. The
branch is intentionally grouped around workflow/QoL files and keeps the
file count below the Greptile limit.

## Model Used

- OpenAI GPT-5 Codex via Paperclip `codex_local` adapter, with
shell/git/GitHub CLI tool use.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] If this change affects the UI, I have included before/after
screenshots
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

ui/src/components/SidebarCompanyMenu.tsx

@@ -1,4 +1,4 @@
-import { useState } from "react";
+import { useMemo, useState } from "react";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { Check, ChevronsUpDown, LogOut, Plus, Settings, UserPlus } from "lucide-react";
 import type { Company } from "@paperclipai/shared";
@@ -46,7 +46,10 @@ export function SidebarCompanyMenu({ open: controlledOpen, onOpenChange }: Sideb
   const navigate = useNavigate();
   const open = controlledOpen ?? internalOpen;
   const setOpen = onOpenChange ?? setInternalOpen;
-  const sidebarCompanies = companies.filter((company) => company.status !== "archived");
+  const sidebarCompanies = useMemo(
+    () => companies.filter((company) => company.status !== "archived"),
+    [companies],
+  );
   const { data: session } = useQuery({
     queryKey: queryKeys.auth.session,
     queryFn: () => authApi.getSession(),
@@ -110,7 +113,7 @@ export function SidebarCompanyMenu({ open: controlledOpen, onOpenChange }: Sideb
         <DropdownMenuLabel className="px-2 py-1.5 text-[11px] font-semibold uppercase text-muted-foreground">
           Switch workspace
         </DropdownMenuLabel>
-        <div className="max-h-72 overflow-y-auto">
+        <div className="max-h-96 overflow-y-auto">
           {sidebarCompanies.map((company) => {
             const isSelected = company.id === selectedCompany?.id;
             return (
@@ -124,6 +127,9 @@ export function SidebarCompanyMenu({ open: controlledOpen, onOpenChange }: Sideb
               >
                 <WorkspaceIcon company={company} />
                 <span className="min-w-0 flex-1 truncate">{company.name}</span>
+                <span className="shrink-0 rounded bg-muted px-1.5 py-0.5 font-mono text-[10px] text-muted-foreground">
+                  {company.issuePrefix}
+                </span>
                 {isSelected ? <Check className="size-4 text-muted-foreground" /> : null}
               </DropdownMenuItem>
             );