feat: add generated chat titles

[loocor]

Summary

• add Helper auto naming settings and a Regenerate chat title session action
• generate chat titles through the Codex app-server for local and remote sessions
• use generated titles for friendly Markdown export filenames
• harden title regeneration with longer bridge timeouts, sidebar cache-only refresh, export prevalidation, and canonical auto naming settings

Verification

• bun test runtime/_test-settings.test.js src/routes.test.ts
• bun run check
• bun run bundle:runtime
• git diff --check
• cargo test --manifest-path src-tauri/Cargo.toml -- --nocapture

[Copilot]

Pull request overview

This PR adds “auto naming” capabilities to Codex Helper by introducing generated chat titles (via the Codex app-server) for both title regeneration and friendlier Markdown export filenames, along with new UI/settings and hardened bridge behavior.

Changes:

• Add auto-naming settings (enable regenerate action, friendly filenames, min/max title length) across TS runtime + Rust bridge.
• Introduce /auto-rename-chat bridge route and Codex app-server client support for generating + setting thread titles.
• Improve export behavior with rollout prevalidation and longer bridge timeouts for naming/export routes.

Reviewed changes

Copilot reviewed 17 out of 17 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/rust-bridge.ts	Allows routing /auto-rename-chat through the Rust bridge binary.
src/routes.ts	Adds/validates new auto-naming settings (including legacy key canonicalization).
src/routes.test.ts	Adds tests for auto-naming settings, canonical/legacy behavior, and long timeouts.
src/bridge.ts	Adds per-route bridge timeouts + friendlier timeout messages for naming/export.
src-tauri/src/settings.rs	Extends Rust settings with auto-naming options and range validation + tests.
src-tauri/src/session_actions.rs	Adds auto-rename action and integrates friendly-title generation into Markdown export.
src-tauri/src/routes.rs	Wires new /auto-rename-chat route to session actions.
src-tauri/src/markdown.rs	Adds rollout prevalidation helper and new tests for empty rollouts.
src-tauri/src/codex_app_server.rs	Implements thread read + title generation + title set APIs via app-server JSON-RPC.
src-tauri/src/bridge_cli.rs	Exposes /auto-rename-chat via the bridge CLI for local testing.
runtime/styles.js	Adds styling for number inputs used in auto-naming settings UI.
runtime/settings.js	Renders auto-naming settings and adds number-setting update handling.
runtime/sessions.js	Adds “Regenerate chat title” session action and friendly filename export behavior.
runtime/native-settings.js	Adds native settings UI for auto-naming toggles and numeric inputs.
runtime/constants.js	Adds new settings defaults and helper attribute for numeric settings.
runtime/bootstrap.js	Hooks change events for numeric settings inputs.
runtime/_test-settings.test.js	Updates runtime tests to cover new auto-rename and friendly filename flows.

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