refactor: restructure project layout and add install.mjs

- Move src/ → plugin/ with subdirectories:
  - plugin/core/ (business logic, models, store, permissions, utils, memory)
  - plugin/tools/ (query, resources)
  - plugin/commands/ (placeholder for slash commands)
  - plugin/hooks/ (placeholder for lifecycle hooks)
  - plugin/index.ts (wiring layer only, no business logic)
- Add install.mjs with --install, --uninstall, --openclaw-profile-path
- Add skills/ and docs/ root directories
- Move planning docs (PLAN.md, FEAT.md, AGENT_TASKS.md) to docs/
- Remove old scripts/install.sh
- Update tsconfig rootDir: src → plugin
- Update README.md and README.zh.md with new layout
- Bump version to 0.2.0
- All tests pass

plugin/core/store/auditStore.ts

@@ -0,0 +1,19 @@
+import type { AuditLogEntry } from '../models/audit';
+
+const MAX_AUDIT = 1000;
+
+export class AuditStore {
+  private logs: AuditLogEntry[] = [];
+
+  append(entry: AuditLogEntry): AuditLogEntry {
+    this.logs.push(entry);
+    if (this.logs.length > MAX_AUDIT) this.logs.shift();
+    return entry;
+  }
+
+  list(limit = 100, offset = 0): AuditLogEntry[] {
+    const safeLimit = Math.min(Math.max(1, limit), 500);
+    const safeOffset = Math.max(0, offset);
+    return this.logs.slice(safeOffset, safeOffset + safeLimit);
+  }
+}

plugin/core/store/jsonStore.ts

@@ -0,0 +1,156 @@
+import { DEFAULT_STATE } from "../config/defaults";
+import type {
+  Agent,
+  Department,
+  Identity,
+  Organization,
+  StoreState,
+  Supervisor,
+  Team
+} from "../models/types";
+import { readJsonFile, writeJsonFile } from "../utils/fs";
+
+export class JsonStore {
+  private state: StoreState;
+
+  constructor(private readonly filePath: string) {
+    this.state = readJsonFile<StoreState>(filePath, DEFAULT_STATE);
+  }
+
+  save(): void {
+    writeJsonFile(this.filePath, this.state);
+  }
+
+  snapshot(): StoreState {
+    return JSON.parse(JSON.stringify(this.state)) as StoreState;
+  }
+
+  replace(state: StoreState): void {
+    this.state = JSON.parse(JSON.stringify(state)) as StoreState;
+    this.save();
+  }
+
+  addOrganization(org: Organization): Organization {
+    this.state.organizations.push(org);
+    this.save();
+    return org;
+  }
+
+  addDepartment(dept: Department): Department {
+    this.state.departments.push(dept);
+    this.save();
+    return dept;
+  }
+
+  renameDepartment(deptId: string, name: string): Department | undefined {
+    const dept = this.findDepartment(deptId);
+    if (!dept) return undefined;
+    dept.name = name;
+    this.save();
+    return dept;
+  }
+
+  deleteDepartment(deptId: string): boolean {
+    const before = this.state.departments.length;
+    this.state.departments = this.state.departments.filter((d) => d.id !== deptId);
+    this.state.teams = this.state.teams.filter((t) => t.deptId !== deptId);
+    this.state.identities = this.state.identities.filter((i) => i.deptId !== deptId);
+    const changed = this.state.departments.length !== before;
+    if (changed) this.save();
+    return changed;
+  }
+
+  addTeam(team: Team): Team {
+    this.state.teams.push(team);
+    this.save();
+    return team;
+  }
+
+  renameTeam(teamId: string, name: string): Team | undefined {
+    const team = this.findTeam(teamId);
+    if (!team) return undefined;
+    team.name = name;
+    this.save();
+    return team;
+  }
+
+  migrateTeam(teamId: string, newDeptId: string): Team | undefined {
+    const team = this.findTeam(teamId);
+    if (!team) return undefined;
+    team.deptId = newDeptId;
+    for (const identity of this.state.identities) {
+      if (identity.teamId === teamId) identity.deptId = newDeptId;
+    }
+    this.save();
+    return team;
+  }
+
+  deleteTeam(teamId: string): boolean {
+    const before = this.state.teams.length;
+    this.state.teams = this.state.teams.filter((t) => t.id !== teamId);
+    this.state.identities = this.state.identities.filter((i) => i.teamId !== teamId);
+    const changed = before !== this.state.teams.length;
+    if (changed) this.save();
+    return changed;
+  }
+
+  addAgent(agent: Agent): Agent {
+    this.state.agents.push(agent);
+    this.save();
+    return agent;
+  }
+
+  addIdentity(identity: Identity): Identity {
+    this.state.identities.push(identity);
+    this.save();
+    return identity;
+  }
+
+  upsertSupervisor(rel: Supervisor): Supervisor {
+    const idx = this.state.supervisors.findIndex((x) => x.agentId === rel.agentId);
+    if (idx >= 0) this.state.supervisors[idx] = rel;
+    else this.state.supervisors.push(rel);
+    this.save();
+    return rel;
+  }
+
+  findAgent(agentId: string): Agent | undefined {
+    return this.state.agents.find((a) => a.id === agentId);
+  }
+
+  findOrganization(orgId: string): Organization | undefined {
+    return this.state.organizations.find((o) => o.id === orgId);
+  }
+
+  listOrganizations(): Organization[] {
+    return this.state.organizations;
+  }
+
+  findDepartment(deptId: string): Department | undefined {
+    return this.state.departments.find((d) => d.id === deptId);
+  }
+
+  listDepartments(): Department[] {
+    return this.state.departments;
+  }
+
+  findTeam(teamId: string): Team | undefined {
+    return this.state.teams.find((t) => t.id === teamId);
+  }
+
+  listTeams(): Team[] {
+    return this.state.teams;
+  }
+
+  listAgents(): Agent[] {
+    return this.state.agents;
+  }
+
+  listIdentities(): Identity[] {
+    return this.state.identities;
+  }
+
+  findSupervisor(agentId: string): Supervisor | undefined {
+    return this.state.supervisors.find((s) => s.agentId === agentId);
+  }
+}