feat(cli): add persistent input history with rustyline

CHANGELOG.md

@@ -7,6 +7,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 ## [Unreleased]
 
 ### Added
+- Persistent CLI input history with rustyline: arrow key navigation, prefix search, line editing, SQLite-backed persistence across restarts (#604)
 - Clickable markdown links in TUI via OSC 8 hyperlinks — `[text](url)` renders as terminal-clickable link with URL sanitization and scheme allowlist (#580)
 - `@`-triggered fuzzy file picker in TUI input — type `@` to search project files by name/path/extension with real-time filtering (#600)
 - Orchestrator provider option in `zeph init` wizard for multi-model routing setup (#597)

Cargo.toml

@@ -43,6 +43,7 @@ ratatui = "0.30"
 regex = "1.12"
 reqwest = { version = "0.13", default-features = false }
 rmcp = "0.15"
+rustyline = { version = "17.0", default-features = false }
 semver = "1.0.27"
 scrape-core = "0.2.2"
 subtle = "2.6"
@@ -158,6 +159,7 @@ zeph-gateway = { workspace = true, optional = true }
 zeph-scheduler = { workspace = true, optional = true }
 zeph-tui = { workspace = true, optional = true }
 reqwest = { workspace = true, optional = true, features = ["rustls"] }
+sqlx = { workspace = true, features = ["runtime-tokio", "sqlite"] }
 
 [dev-dependencies]
 serial_test.workspace = true

crates/zeph-channels/Cargo.toml

@@ -16,6 +16,8 @@ futures = { workspace = true, optional = true }
 hmac = { version = "0.12", optional = true }
 pulldown-cmark.workspace = true
 reqwest = { workspace = true, features = ["rustls", "json"] }
+rustyline.workspace = true
+sqlx = { workspace = true, features = ["runtime-tokio", "sqlite"] }
 serde = { workspace = true, features = ["derive"] }
 serde_json.workspace = true
 sha2 = { version = "0.10", optional = true }

crates/zeph-channels/README.md

@@ -10,7 +10,7 @@ Implements I/O channel adapters that connect the agent to different frontends. S
 
 | Module | Description |
 |--------|-------------|
-| `cli` | `CliChannel` — interactive terminal I/O with `/image` command for vision input |
+| `cli` | `CliChannel` — interactive terminal I/O with persistent input history (rustyline), prefix search, and `/image` command for vision input |
 | `telegram` | Telegram adapter via teloxide with streaming; voice/audio message detection and file download; photo message support for vision input |
 | `discord` | Discord adapter (optional feature) |
 | `slack` | Slack adapter (optional feature); audio file detection and download with Bearer auth |