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-tauri/src/config.rs

@@ -1,3 +1,5 @@
+use std::collections::HashMap;
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
@@ -34,6 +36,21 @@ pub struct ClaudeStartOptions {
 
     #[serde(default)]
     pub max_output_tokens: Option<u64>,
+
+    #[serde(default)]
+    pub disable_cron: bool,
+
+    #[serde(default = "default_include_git_instructions")]
+    pub include_git_instructions: bool,
+
+    #[serde(default = "default_enable_claudeai_mcp_servers")]
+    pub enable_claudeai_mcp_servers: bool,
+
+    #[serde(default)]
+    pub auto_memory_directory: Option<String>,
+
+    #[serde(default)]
+    pub model_overrides: Option<HashMap<String, String>>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -168,6 +185,21 @@ pub struct HikariConfig {
 
     #[serde(default)]
     pub task_loop_include_summary: bool,
+
+    #[serde(default)]
+    pub disable_cron: bool,
+
+    #[serde(default = "default_include_git_instructions")]
+    pub include_git_instructions: bool,
+
+    #[serde(default = "default_enable_claudeai_mcp_servers")]
+    pub enable_claudeai_mcp_servers: bool,
+
+    #[serde(default)]
+    pub auto_memory_directory: Option<String>,
+
+    #[serde(default)]
+    pub model_overrides: Option<HashMap<String, String>>,
 }
 
 impl Default for HikariConfig {
@@ -214,6 +246,11 @@ impl Default for HikariConfig {
             task_loop_auto_commit: false,
             task_loop_commit_prefix: "feat".to_string(),
             task_loop_include_summary: false,
+            disable_cron: false,
+            include_git_instructions: true,
+            enable_claudeai_mcp_servers: true,
+            auto_memory_directory: None,
+            model_overrides: None,
         }
     }
 }
@@ -258,6 +295,14 @@ fn default_task_loop_commit_prefix() -> String {
     "feat".to_string()
 }
 
+fn default_include_git_instructions() -> bool {
+    true
+}
+
+fn default_enable_claudeai_mcp_servers() -> bool {
+    true
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default, PartialEq)]
 #[serde(rename_all = "lowercase")]
 pub enum BudgetAction {
@@ -352,6 +397,11 @@ mod tests {
         assert!(!config.task_loop_auto_commit);
         assert_eq!(config.task_loop_commit_prefix, "feat");
         assert!(!config.task_loop_include_summary);
+        assert!(!config.disable_cron);
+        assert!(config.include_git_instructions);
+        assert!(config.enable_claudeai_mcp_servers);
+        assert!(config.auto_memory_directory.is_none());
+        assert!(config.model_overrides.is_none());
     }
 
     #[test]
@@ -398,6 +448,14 @@ mod tests {
             task_loop_auto_commit: true,
             task_loop_commit_prefix: "fix".to_string(),
             task_loop_include_summary: true,
+            disable_cron: true,
+            include_git_instructions: false,
+            enable_claudeai_mcp_servers: false,
+            auto_memory_directory: Some("/custom/memory".to_string()),
+            model_overrides: Some(HashMap::from([(
+                "claude-opus-4-6".to_string(),
+                "arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-opus-4-6-v1".to_string(),
+            )])),
         };
 
         let json = serde_json::to_string(&config).unwrap();
@@ -415,6 +473,19 @@ mod tests {
         assert!(deserialized.task_loop_auto_commit);
         assert_eq!(deserialized.task_loop_commit_prefix, "fix");
         assert!(deserialized.task_loop_include_summary);
+        assert!(deserialized.disable_cron);
+        assert!(!deserialized.include_git_instructions);
+        assert!(!deserialized.enable_claudeai_mcp_servers);
+        assert_eq!(
+            deserialized.auto_memory_directory,
+            Some("/custom/memory".to_string())
+        );
+        assert!(deserialized.model_overrides.is_some());
+        let overrides = deserialized.model_overrides.unwrap();
+        assert_eq!(
+            overrides.get("claude-opus-4-6").map(String::as_str),
+            Some("arn:aws:bedrock:us-east-1::foundation-model/anthropic.claude-opus-4-6-v1")
+        );
     }
 
     #[test]