refactor(renderer): route all Phosphor icon imports through ui/icons barrel

Create src/renderer/components/ui/icons.ts as the single re-export point
for every Phosphor icon the renderer touches, then rewrite the 95 files
that previously imported directly from "@phosphor-icons/react" to pull
from the relative-path-to-barrel instead. The TitleBar commit earlier
in this series already used ui/icons; this commit extends the pattern
to the rest of the renderer.

Benefits now wired in:
  - one location where bundle tree-shaking can be reasoned about,
  - typos like Briefcase vs BriefCase show up against a finite list,
  - re-theming or swapping icon sets is a one-file edit,
  - a lint rule that flags raw @phosphor-icons/react imports can be
    added later without mass-rewriting call sites.

The barrel also re-exports the `Icon` type so call sites that type
icon props against the Phosphor component type work unchanged.

Test count stays at 363 passing; typecheck stays at 156 errors.

src/renderer/components/ui/icons.ts

@@ -0,0 +1,124 @@
+/**
+ * Central barrel for all Phosphor icons used across the renderer.
+ *
+ * Every renderer component imports icons from this module so that:
+ *   - bundle tree-shaking has a single module boundary to look at,
+ *   - typos like `BriefCase` vs `Briefcase` surface in one place,
+ *   - swapping icon sets later means touching one file.
+ *
+ * Keep this list sorted alphabetically. When a new icon is needed,
+ * add it here first, then import from "@/components/ui/icons" (or the
+ * relative path from the file). Raw `@phosphor-icons/react` imports
+ * outside this file should be treated as a regression.
+ */
+export {
+  ArrowBendUpLeft,
+  ArrowClockwise,
+  ArrowCounterClockwise,
+  ArrowRight,
+  ArrowSquareOut,
+  ArrowsClockwise,
+  At,
+  Bell,
+  BookOpen,
+  Brain,
+  Briefcase,
+  Browser,
+  Buildings,
+  CalendarBlank,
+  Camera,
+  CaretDown,
+  CaretRight,
+  CaretUp,
+  CaretUpDown,
+  ChartLine,
+  ChatCircle,
+  ChatCircleDots,
+  ChatTeardrop,
+  Check,
+  CheckCircle,
+  CheckSquare,
+  Circle,
+  CircleNotch,
+  Clock,
+  ClockCounterClockwise,
+  Command,
+  Copy,
+  Cpu,
+  CurrencyCircleDollar,
+  DiscordLogo,
+  Download,
+  EnvelopeSimple,
+  Eye,
+  FacebookLogo,
+  FileCode,
+  FileText,
+  Fire,
+  FloppyDisk,
+  FolderOpen,
+  FolderSimple,
+  Funnel,
+  Gear,
+  GithubLogo,
+  Globe,
+  GlobeHemisphereWest,
+  GlobeSimple,
+  HardDrive,
+  Hash,
+  Heart,
+  Heartbeat,
+  Hourglass,
+  InstagramLogo,
+  Kanban,
+  Key,
+  Lightbulb,
+  Lightning,
+  Link,
+  LinkedinLogo,
+  ListChecks,
+  MagnifyingGlass,
+  Megaphone,
+  Minus,
+  MonitorPlay,
+  MusicNote,
+  NotePencil,
+  Notebook,
+  PaperPlaneTilt,
+  Paperclip,
+  Pause,
+  Pencil,
+  PinterestLogo,
+  Play,
+  Plugs,
+  Plus,
+  PuzzlePiece,
+  RedditLogo,
+  Robot,
+  Rocket,
+  Rows,
+  ShieldCheck,
+  SidebarSimple,
+  SignIn,
+  SlidersHorizontal,
+  Square,
+  SquaresFour,
+  Target,
+  TelegramLogo,
+  Terminal,
+  TerminalWindow,
+  TiktokLogo,
+  Timer,
+  Trash,
+  Tray,
+  UserCircle,
+  UserPlus,
+  UsersThree,
+  Warning,
+  WarningCircle,
+  WhatsappLogo,
+  XCircle,
+  XLogo,
+  YoutubeLogo,
+} from "@phosphor-icons/react";
+export { X } from "@phosphor-icons/react";
+export type { Icon } from "@phosphor-icons/react";