feat(09-01): define granular event types, IPC channels, entity getters, and Zustand patch methods

- Add 5 granular event interfaces (TaskUpdated, RunUpdated, ApprovalUpdated, AgentUpdated, BudgetChanged) to DesktopEvent union
- Add 4 entity getter IPC channels (getTask, getAgent, getRun, getApproval) with Zod validation and company ownership checks
- Add getRun method to AppDatabase following existing getTask pattern
- Add 4 preload bridge methods for entity getters
- Add 8 patch/remove methods and refreshBadges to CompanySlice
- Add selective-ipc.test.ts with exhaustive union type tests
- Extend store.test.ts with 14 patch method tests

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

src/preload/index.ts

@@ -82,6 +82,10 @@ const api: DesktopApi = {
     ipcRenderer.invoke("recovery:dismiss", { taskId }),
   recoveryFail: (taskId: string) =>
     ipcRenderer.invoke("recovery:fail", { taskId }),
+  getTask: (input) => ipcRenderer.invoke(IPC_CHANNELS.getTask, input),
+  getAgent: (input) => ipcRenderer.invoke(IPC_CHANNELS.getAgent, input),
+  getRun: (input) => ipcRenderer.invoke(IPC_CHANNELS.getRun, input),
+  getApproval: (input) => ipcRenderer.invoke(IPC_CHANNELS.getApproval, input),
   subscribe: (callback: (event: DesktopEvent) => void) => {
     const listener = (_event: Electron.IpcRendererEvent, payload: DesktopEvent) => callback(payload);
     ipcRenderer.on(IPC_CHANNELS.rendererEvent, listener);