Initial commit: Emby TUI client with libmpv playback

A ratatui-based terminal browser for an Emby server with mpv as the player
backend. Authenticates via /Users/AuthenticateByName, lists libraries and
items, streams via /Videos/{id}/stream, and reports playback progress so
"Continue Watching" stays in sync across clients.

Credentials are read in priority order: CLI flags, env vars
(EMBY_SERVER/EMBY_USER/EMBY_PASSWORD), ./config.toml or
$XDG_CONFIG_HOME/emby-client/config.toml, then an in-TUI login prompt with
an option to persist to config.toml.

Modules: config (CLI + TOML loader), login (TUI prompt), emby (HTTP client
+ progress Reporter), player (libmpv2 wrapper, blocks until file ends),
app (browse state, Continue Watching virtual entry), ui (ratatui frontend).

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>

Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "emby-client"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = "1"
+clap = { version = "4", features = ["derive", "env"] }
+crossterm = "0.28"
+directories = "5"
+libmpv2 = "4"
+ratatui = "0.28"
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "time", "sync"] }
+toml = "0.8"
+uuid = { version = "1", features = ["v4"] }