feat(03-01): add skill section type wiring, Zustand slice, i18n, and sidebar nav entry

- Add "skills" to SectionId union in shared types
- Add SkillRecord, SkillImportResult, SkillUpdateStatus types to shared/types.ts
- Create SkillSlice with skills list, selection, file path, and import modal state
- Wire SkillSlice into Zustand store composition
- Add "nav.skills" i18n keys for English and Chinese
- Add Skills sidebar nav entry with PuzzlePiece icon between Communication and Documents
- Add section === "skills" rendering route in App.tsx
- Clear skill state on company switch
- Add skills case to navigateTo in NavigationSlice

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/renderer/App.tsx

@@ -14,6 +14,7 @@ import {
   MagnifyingGlass,
   Megaphone,
   Plus,
+  PuzzlePiece,
   UsersThree,
   ShieldCheck,
   Trash,
@@ -75,6 +76,7 @@ import { SocialAccountsPanel } from "./components/social";
 import { AutomationPanel } from "./components/automation";
 import { CommunicationHub } from "./components/communication";
 import { HiringPipeline } from "./components/hiring";
+import { SkillsSection } from "./components/skills";
 import { DocumentCenter, KnowledgeBaseManager, MeetingsManager, SprintManager } from "./components/company-operations";
 import { ActionButton, ErrorBoundary, ListFrame, ListRow, Modal, Panel, SectionButton, Select, StatusPill, useFocusTrap, useReducedMotion } from "./components/ui";
 import ToastContainer from "./components/Toast";
@@ -94,6 +96,7 @@ const sidebarNavDefs: NavItemDef[] = [
   { id: "agents", labelKey: "nav.agents", icon: UsersThree },
   { id: "tasks", labelKey: "nav.work", icon: ListChecks },
   { id: "communication", labelKey: "nav.communication", icon: ChatCircle },
+  { id: "skills", labelKey: "nav.skills", icon: PuzzlePiece },
   { id: "documents", labelKey: "nav.documents", icon: FileText },
   { id: "approvals", labelKey: "nav.approvals", icon: ShieldCheck },
   { id: "social", labelKey: "nav.social", icon: Megaphone },
@@ -181,6 +184,10 @@ export function App() {
     store.setSocialAccounts([]);
     store.setBrowserActions([]);
     store.setBadges(null);
+    store.setSkills([]);
+    store.setSelectedSkillId(null);
+    store.setSelectedSkillFilePath("SKILL.md");
+    store.setSkillImportModalOpen(false);
   }, []);
 
   const refresh = useCallback(async () => {
@@ -1193,6 +1200,10 @@ export function App() {
                 />
               )}
 
+              {section === "skills" && currentCompany ? (
+                <SkillsSection companyId={currentCompany.id} agents={companyAgents} onRefresh={refresh} />
+              ) : null}
+
               {section === "automation" && currentCompany ? (
                 <AutomationPanel
                   key={currentCompany.id}

src/renderer/components/skills/SkillsSection.tsx

@@ -0,0 +1,15 @@
+import type { AgentRecord } from "@shared/types";
+
+interface SkillsSectionProps {
+  companyId: string;
+  agents: AgentRecord[];
+  onRefresh: () => void;
+}
+
+export function SkillsSection({ companyId: _companyId, agents: _agents, onRefresh: _onRefresh }: SkillsSectionProps) {
+  return (
+    <div className="h-full">
+      <p className="text-[color:var(--muted)]">Skills section placeholder -- Task 2</p>
+    </div>
+  );
+}

src/renderer/components/skills/index.ts

@@ -0,0 +1 @@
+export { SkillsSection } from "./SkillsSection";

src/renderer/i18n/en.ts

@@ -22,6 +22,7 @@ export const en: Record<string, string> = {
   "nav.costs": "Costs",
   "nav.activity": "Activity",
   "nav.social": "Social Media",
+  "nav.skills": "Skills",
   "nav.connectors": "Connectors",
   "nav.workspaces": "Workspaces",
   "nav.settings": "Settings",

src/renderer/i18n/zh.ts

@@ -22,6 +22,7 @@ export const zh: Record<string, string> = {
   "nav.costs": "成本",
   "nav.activity": "活动",
   "nav.social": "社交媒体",
+  "nav.skills": "技能",
   "nav.connectors": "连接器",
   "nav.workspaces": "工作区",
   "nav.settings": "设置",

src/renderer/state/slices/navigation.ts

@@ -105,6 +105,7 @@ export const createNavigationSlice: StateCreator<
         else if (section === "connectors") state.selectedConnectorId = entityId;
         else if (section === "communication")
           state.selectedCommunicationEntityId = entityId;
+        else if (section === "skills") state.selectedSkillId = entityId;
       }
     }),
 });

src/renderer/state/slices/skill.ts

@@ -0,0 +1,42 @@
+import type { StateCreator } from "zustand";
+import type { AppState } from "../store";
+import type { SkillRecord } from "@shared/types";
+
+export interface SkillSlice {
+  skills: SkillRecord[];
+  setSkills: (skills: SkillRecord[]) => void;
+  selectedSkillId: string | null;
+  setSelectedSkillId: (id: string | null) => void;
+  selectedSkillFilePath: string;
+  setSelectedSkillFilePath: (path: string) => void;
+  skillImportModalOpen: boolean;
+  setSkillImportModalOpen: (open: boolean) => void;
+}
+
+export const createSkillSlice: StateCreator<
+  AppState,
+  [["zustand/immer", never]],
+  [],
+  SkillSlice
+> = (set) => ({
+  skills: [],
+  setSkills: (skills) =>
+    set((state) => {
+      state.skills = skills;
+    }),
+  selectedSkillId: null,
+  setSelectedSkillId: (id) =>
+    set((state) => {
+      state.selectedSkillId = id;
+    }),
+  selectedSkillFilePath: "SKILL.md",
+  setSelectedSkillFilePath: (path) =>
+    set((state) => {
+      state.selectedSkillFilePath = path;
+    }),
+  skillImportModalOpen: false,
+  setSkillImportModalOpen: (open) =>
+    set((state) => {
+      state.skillImportModalOpen = open;
+    }),
+});

src/renderer/state/store.ts

@@ -16,13 +16,15 @@ import {
   type CommunicationSlice,
 } from "./slices/communication";
 import { createSocialSlice, type SocialSlice } from "./slices/social";
+import { createSkillSlice, type SkillSlice } from "./slices/skill";
 
 export type AppState = NavigationSlice &
   CompanySlice &
   SelectionSlice &
   UiSlice &
   CommunicationSlice &
-  SocialSlice;
+  SocialSlice &
+  SkillSlice;
 
 export const useAppStore = create<AppState>()(
   devtools(
@@ -33,6 +35,7 @@ export const useAppStore = create<AppState>()(
       ...createUiSlice(...a),
       ...createCommunicationSlice(...a),
       ...createSocialSlice(...a),
+      ...createSkillSlice(...a),
     })),
     {
       name: "AgentCompany",