feat: CLI v2.1.81–v2.1.104 support (#261)

## Summary

Implements support for all Claude Code CLI changes from v2.1.81 through v2.1.104, closing issues #253–#260.

### Changes

- **#253** — New `CwdChanged` hook event: parse and emit `claude:cwd-changed` Tauri event; new `CwdChangedEvent` type
- **#254** — New `FileChanged` hook event: parse and emit `claude:file-changed` Tauri event; new `FileChangedEvent` type
- **#255** — Idle-return prompt: TUI-only feature, not present in `--output-format stream-json` mode — closed as not applicable
- **#256** — New `TaskCreated` and `PermissionDenied` hook events: parse and emit `claude:task-created` / `claude:permission-denied` Tauri events; `PermissionDenied` also triggers `CharacterState::Permission` character animation
- **#257** — Defer permission request: no PreToolUse hook response mechanism in Hikari Desktop — closed as not applicable
- **#258** — `Monitor` tool: added `"Monitor"` to `SEARCH_TOOLS` constant so it maps to `CharacterState::Searching`
- **#259** — `disableSkillShellExecution` setting: wired through `ClaudeStartOptions`, `HikariConfig`, `--settings` JSON, TypeScript interface, and exposed in the Config Sidebar UI
- **#260** — Updated `SUPPORTED_CLI_VERSION` constant from `"2.1.80"` to `"2.1.104"`

All changes pass `check-all.sh` (ESLint → Prettier → svelte-check → Vitest → Clippy → cargo test with llvm-cov).

✨ This PR was created with help from Hikari~ 🌸

Reviewed-on: #261
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

src/lib/stores/config.ts

@@ -91,6 +91,8 @@ export interface HikariConfig {
   auto_memory_directory: string | null;
   // Model overrides for provider-specific model IDs (AWS Bedrock, Google Vertex, etc.)
   model_overrides: Record<string, string> | null;
+  // Prevents skill scripts from executing shell commands (Claude Code v2.1.91+)
+  disable_skill_shell_execution: boolean;
 }
 
 const defaultConfig: HikariConfig = {
@@ -149,6 +151,7 @@ const defaultConfig: HikariConfig = {
   enable_claudeai_mcp_servers: true,
   auto_memory_directory: null,
   model_overrides: null,
+  disable_skill_shell_execution: false,
 };
 
 function createConfigStore() {