feat: CLI v2.1.68–v2.1.74 compatibility updates (#221)

## Summary

This PR brings Hikari Desktop up to full compatibility with Claude Code CLI versions v2.1.68 through v2.1.74, implementing all changelog items audited in issues #200–#218.

## Changes

### Bug Fixes
- Remove deprecated Claude Opus 4.0 and 4.1 models from the model selector
- Auto-migrate users pinned to deprecated models to Opus 4.6

### New Features
- Add cron tool support (`CronCreate`, `CronDelete`, `CronList`) with character state mapping and `CLAUDE_CODE_DISABLE_CRON` settings toggle
- Handle `EnterWorktree` and `ExitWorktree` tools in character state mapping and tool display
- Add CLI update check with npm registry indicator in the version bar
- Add `agent_type` field and support the Agent tool rename from CLI v2.1.69
- Consume `worktree` field from status line hook events
- Display per-agent model override in the agent monitor tree
- Expose Claude Code CLI built-in slash commands (`/simplify`, `/loop`, `/batch`, `/memory`, `/context`) in the command menu with CLI badges
- Add `includeGitInstructions` toggle in settings
- Add `ENABLE_CLAUDEAI_MCP_SERVERS` opt-out setting
- Linkify MCP binary file paths (PDFs, audio, Office docs) in markdown output
- Add auto-memory panel, `/memory` slash command shortcut, and unified toast notification system
- Toast notifications for `WorktreeCreate` and `WorktreeRemove` hook events
- Sort session resume list by most recent activity, with most recent user message as preview
- Convert WSL Linux paths to Windows UNC paths when opening binary files via `open_binary_file` command
- Expose `autoMemoryDirectory` setting in ConfigSidebar (Agent Settings section)
- Add `/context` as a CLI built-in in the slash command menu
- Expose `modelOverrides` setting as a JSON textarea in ConfigSidebar (for AWS Bedrock, Google Vertex, etc.)

> **Note:** The CLI update check commit does not have a corresponding issue — it was a bonus addition during the audit sprint.

## Closes

Closes #200
Closes #201
Closes #202
Closes #205
Closes #206
Closes #207
Closes #208
Closes #209
Closes #210
Closes #211
Closes #212
Closes #213
Closes #214
Closes #215
Closes #216
Closes #217
Closes #218

Reviewed-on: #221
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/lib/commands/slashCommands.ts

@@ -6,11 +6,14 @@ import { setSkipNextGreeting, updateDiscordRpc } from "$lib/tauri";
 import { searchState } from "$lib/stores/search";
 import { conversationsStore } from "$lib/stores/conversations";
 import { configStore } from "$lib/stores/config";
+import { memoryBrowserStore } from "$lib/stores/memoryBrowser";
 
 export interface SlashCommand {
   name: string;
   description: string;
   usage: string;
+  /** "cli" = built into Claude Code CLI; omitted = Hikari app command */
+  source?: "cli";
   execute: (args: string) => Promise<void> | void;
 }
 
@@ -64,6 +67,10 @@ async function changeDirectory(path: string): Promise<void> {
         use_worktree: config.use_worktree ?? false,
         disable_1m_context: config.disable_1m_context ?? false,
         max_output_tokens: config.max_output_tokens ?? null,
+        include_git_instructions: config.include_git_instructions ?? true,
+        enable_claudeai_mcp_servers: config.enable_claudeai_mcp_servers ?? true,
+        auto_memory_directory: config.auto_memory_directory || null,
+        model_overrides: config.model_overrides || null,
       },
     });
 
@@ -141,6 +148,10 @@ async function startNewConversation(): Promise<void> {
         use_worktree: config.use_worktree ?? false,
         disable_1m_context: config.disable_1m_context ?? false,
         max_output_tokens: config.max_output_tokens ?? null,
+        include_git_instructions: config.include_git_instructions ?? true,
+        enable_claudeai_mcp_servers: config.enable_claudeai_mcp_servers ?? true,
+        auto_memory_directory: config.auto_memory_directory || null,
+        model_overrides: config.model_overrides || null,
       },
     });
 
@@ -231,6 +242,74 @@ export const slashCommands: SlashCommand[] = [
       }
     },
   },
+  {
+    name: "simplify",
+    description: "Review changed code for reuse, quality, and efficiency (Claude Code built-in)",
+    usage: "/simplify",
+    source: "cli",
+    execute: async () => {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        claudeStore.addLine("error", "No active conversation");
+        return;
+      }
+      await invoke("send_prompt", { conversationId, message: "/simplify" });
+    },
+  },
+  {
+    name: "loop",
+    description: "Run a prompt or slash command on a recurring interval (Claude Code built-in)",
+    usage: "/loop [interval] [command]",
+    source: "cli",
+    execute: async (args: string) => {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        claudeStore.addLine("error", "No active conversation");
+        return;
+      }
+      const message = args.trim() ? `/loop ${args.trim()}` : "/loop";
+      await invoke("send_prompt", { conversationId, message });
+    },
+  },
+  {
+    name: "batch",
+    description: "Process multiple tasks in a single Claude Code session (Claude Code built-in)",
+    usage: "/batch [tasks]",
+    source: "cli",
+    execute: async (args: string) => {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        claudeStore.addLine("error", "No active conversation");
+        return;
+      }
+      const message = args.trim() ? `/batch ${args.trim()}` : "/batch";
+      await invoke("send_prompt", { conversationId, message });
+    },
+  },
+  {
+    name: "memory",
+    description: "Open the memory browser panel to view and manage memory files",
+    usage: "/memory",
+    source: "cli",
+    execute: () => {
+      memoryBrowserStore.open();
+    },
+  },
+  {
+    name: "context",
+    description:
+      "Show current context window usage with optimisation suggestions (Claude Code built-in)",
+    usage: "/context",
+    source: "cli",
+    execute: async () => {
+      const conversationId = get(claudeStore.activeConversationId);
+      if (!conversationId) {
+        claudeStore.addLine("error", "No active conversation");
+        return;
+      }
+      await invoke("send_prompt", { conversationId, message: "/context" });
+    },
+  },
   {
     name: "skill",
     description: "Invoke a Claude Code skill from ~/.claude/skills/",