Refactor: move model config parsing from renderer to main process via IPC

The renderer was reading config/models.json via workspace:readFile and
manually parsing the provider/model structure. This moves that logic into
a dedicated models:getConfiguredModels IPC handler backed by a new
getAllConfiguredModels() method on the model config repo, matching the
existing models:saveConfig pattern.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/x/packages/shared/src/ipc.ts

@@ -2,7 +2,7 @@ import { z } from 'zod';
 import { RelPath, Encoding, Stat, DirEntry, ReaddirOptions, ReadFileResult, WorkspaceChangeEvent, WriteFileOptions, WriteFileResult, RemoveOptions } from './workspace.js';
 import { ListToolsResponse } from './mcp.js';
 import { AskHumanResponsePayload, CreateRunOptions, Run, ListRunsResponse, ToolPermissionAuthorizePayload } from './runs.js';
-import { LlmModelConfig } from './models.js';
+import { LlmModelConfig, ConfiguredModelsResult } from './models.js';
 import { AgentScheduleConfig, AgentScheduleEntry } from './agent-schedule.js';
 import { AgentScheduleState } from './agent-schedule-state.js';
 import { ServiceEvent } from './service-events.js';
@@ -219,6 +219,10 @@ const ipcSchemas = {
       success: z.literal(true),
     }),
   },
+  'models:getConfiguredModels': {
+    req: z.null(),
+    res: ConfiguredModelsResult,
+  },
   'oauth:connect': {
     req: z.object({
       provider: z.string(),

apps/x/packages/shared/src/models.ts

@@ -13,3 +13,17 @@ export const LlmModelConfig = z.object({
   models: z.array(z.string()).optional(),
   knowledgeGraphModel: z.string().optional(),
 });
+
+export const ConfiguredModelEntry = z.object({
+  flavor: LlmProvider.shape.flavor,
+  model: z.string(),
+  apiKey: z.string().optional(),
+  baseURL: z.string().optional(),
+  headers: z.record(z.string(), z.string()).optional(),
+  knowledgeGraphModel: z.string().optional(),
+});
+
+export const ConfiguredModelsResult = z.object({
+  models: z.array(ConfiguredModelEntry),
+  activeModelKey: z.string(),
+});