Added config support

Cargo.toml

@@ -7,6 +7,7 @@ description = "Web interface backend for Shanty"
 repository = "ssh://connor@git.rcjohnstone.com:2222/Shanty/web.git"
 
 [dependencies]
+shanty-config = { path = "../shanty-config" }
 shanty-db = { path = "../shanty-db" }
 shanty-index = { path = "../shanty-index" }
 shanty-tag = { path = "../shanty-tag" }

frontend/src/api.rs

@@ -196,3 +196,18 @@ pub async fn get_task(id: &str) -> Result<TaskInfo, ApiError> {
 pub async fn get_config() -> Result<AppConfig, ApiError> {
     get_json(&format!("{BASE}/config")).await
 }
+
+pub async fn save_config(config: &AppConfig) -> Result<AppConfig, ApiError> {
+    let body = serde_json::to_string(config).map_err(|e| ApiError(e.to_string()))?;
+    let resp = Request::put(&format!("{BASE}/config"))
+        .header("Content-Type", "application/json")
+        .body(&body)
+        .map_err(|e| ApiError(e.to_string()))?
+        .send()
+        .await
+        .map_err(|e| ApiError(e.to_string()))?;
+    if !resp.ok() {
+        return Err(ApiError(format!("HTTP {}", resp.status())));
+    }
+    resp.json().await.map_err(|e| ApiError(e.to_string()))
+}

frontend/src/pages/settings.rs

@@ -1,3 +1,5 @@
+use web_sys::HtmlInputElement;
+use web_sys::HtmlSelectElement;
 use yew::prelude::*;
 
 use crate::api;
@@ -7,6 +9,7 @@ use crate::types::AppConfig;
 pub fn settings_page() -> Html {
     let config = use_state(|| None::<AppConfig>);
     let error = use_state(|| None::<String>);
+    let message = use_state(|| None::<String>);
 
     {
         let config = config.clone();
@@ -21,32 +24,250 @@ pub fn settings_page() -> Html {
         });
     }
 
+    let on_save = {
+        let config = config.clone();
+        let message = message.clone();
+        let error = error.clone();
+        Callback::from(move |e: SubmitEvent| {
+            e.prevent_default();
+            let config = config.clone();
+            let message = message.clone();
+            let error = error.clone();
+            if let Some(ref c) = *config {
+                let c = c.clone();
+                wasm_bindgen_futures::spawn_local(async move {
+                    match api::save_config(&c).await {
+                        Ok(updated) => {
+                            config.set(Some(updated));
+                            message.set(Some("Settings saved".to_string()));
+                            error.set(None);
+                        }
+                        Err(e) => error.set(Some(e.0)),
+                    }
+                });
+            }
+        })
+    };
+
+    // Helper to update a field in config state
+    macro_rules! field_setter {
+        ($config:expr, $field:ident, $val:expr) => {{
+            let mut c = (*$config).clone().unwrap();
+            c.$field = $val;
+            $config.set(Some(c));
+        }};
+    }
+
+    if let Some(ref err) = *error {
+        if config.is_none() {
+            return html! { <div class="error">{ format!("Error: {err}") }</div> };
+        }
+    }
+
+    let Some(ref c) = *config else {
+        return html! { <p class="loading">{ "Loading configuration..." }</p> };
+    };
+
     html! {
         <div>
             <div class="page-header">
                 <h2>{ "Settings" }</h2>
             </div>
 
+            if let Some(ref msg) = *message {
+                <div class="card" style="border-color: var(--success);">
+                    <p>{ msg }</p>
+                </div>
+            }
             if let Some(ref err) = *error {
                 <div class="card error">{ err }</div>
             }
 
-            { match &*config {
+            <form onsubmit={on_save}>
-                None => html! { <p class="loading">{ "Loading configuration..." }</p> },
+                // Paths
-                Some(c) => html! {
+                <div class="card">
-                    <div class="card">
+                    <h3>{ "Paths" }</h3>
-                        <h3>{ "Configuration" }</h3>
+                    <div class="form-group">
-                        <table>
+                        <label>{ "Library Path" }</label>
-                            <tbody>
+                        <input type="text" value={c.library_path.clone()}
-                                <tr><td class="text-muted">{ "Library Path" }</td><td>{ &c.library_path }</td></tr>
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
-                                <tr><td class="text-muted">{ "Database URL" }</td><td class="text-sm">{ &c.database_url }</td></tr>
+                                let input: HtmlInputElement = e.target_unchecked_into();
-                                <tr><td class="text-muted">{ "Download Path" }</td><td>{ &c.download_path }</td></tr>
+                                field_setter!(config, library_path, input.value());
-                                <tr><td class="text-muted">{ "Organization Format" }</td><td><code>{ &c.organization_format }</code></td></tr>
+                            })} />
-                            </tbody>
-                        </table>
                     </div>
-                },
+                    <div class="form-group">
-            }}
+                        <label>{ "Download Path" }</label>
+                        <input type="text" value={c.download_path.clone()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                field_setter!(config, download_path, input.value());
+                            })} />
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Organization Format" }</label>
+                        <input type="text" value={c.organization_format.clone()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                field_setter!(config, organization_format, input.value());
+                            })} />
+                    </div>
+                </div>
+
+                // Web Server
+                <div class="card">
+                    <h3>{ "Web Server" }</h3>
+                    <p class="text-sm text-muted mb-1">{ "Changes require restart" }</p>
+                    <div class="form-group">
+                        <label>{ "Port" }</label>
+                        <input type="number" value={c.web.port.to_string()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                if let Ok(port) = input.value().parse() {
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.web.port = port;
+                                    config.set(Some(cfg));
+                                }
+                            })} />
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Bind Address" }</label>
+                        <input type="text" value={c.web.bind.clone()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                let mut cfg = (*config).clone().unwrap();
+                                cfg.web.bind = input.value();
+                                config.set(Some(cfg));
+                            })} />
+                    </div>
+                </div>
+
+                // Tagging
+                <div class="card">
+                    <h3>{ "Tagging" }</h3>
+                    <div class="form-group">
+                        <label class="checkbox-label">
+                            <input type="checkbox" checked={c.tagging.write_tags}
+                                onchange={let config = config.clone(); Callback::from(move |e: Event| {
+                                    let input: HtmlInputElement = e.target_unchecked_into();
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.tagging.write_tags = input.checked();
+                                    config.set(Some(cfg));
+                                })} />
+                            { " Write tags to files" }
+                        </label>
+                    </div>
+                    <div class="form-group">
+                        <label class="checkbox-label">
+                            <input type="checkbox" checked={c.tagging.auto_tag}
+                                onchange={let config = config.clone(); Callback::from(move |e: Event| {
+                                    let input: HtmlInputElement = e.target_unchecked_into();
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.tagging.auto_tag = input.checked();
+                                    config.set(Some(cfg));
+                                })} />
+                            { " Auto-tag after indexing" }
+                        </label>
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Confidence Threshold" }</label>
+                        <input type="number" step="0.05" min="0" max="1" value={c.tagging.confidence.to_string()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                if let Ok(v) = input.value().parse() {
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.tagging.confidence = v;
+                                    config.set(Some(cfg));
+                                }
+                            })} />
+                    </div>
+                </div>
+
+                // Downloads
+                <div class="card">
+                    <h3>{ "Downloads" }</h3>
+                    <div class="form-group">
+                        <label>{ "Audio Format" }</label>
+                        <select onchange={let config = config.clone(); Callback::from(move |e: Event| {
+                            let select: HtmlSelectElement = e.target_unchecked_into();
+                            let mut cfg = (*config).clone().unwrap();
+                            cfg.download.format = select.value();
+                            config.set(Some(cfg));
+                        })}>
+                            { for ["opus", "mp3", "flac", "best"].iter().map(|f| html! {
+                                <option value={*f} selected={c.download.format == *f}>{ f }</option>
+                            })}
+                        </select>
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Search Source" }</label>
+                        <select onchange={let config = config.clone(); Callback::from(move |e: Event| {
+                            let select: HtmlSelectElement = e.target_unchecked_into();
+                            let mut cfg = (*config).clone().unwrap();
+                            cfg.download.search_source = select.value();
+                            config.set(Some(cfg));
+                        })}>
+                            { for [("ytmusic", "YouTube Music"), ("youtube", "YouTube")].iter().map(|(v, label)| html! {
+                                <option value={*v} selected={c.download.search_source == *v}>{ label }</option>
+                            })}
+                        </select>
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Cookies Path (optional)" }</label>
+                        <input type="text" value={c.download.cookies_path.clone().unwrap_or_default()}
+                            placeholder="~/.config/shanty/cookies.txt"
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                let mut cfg = (*config).clone().unwrap();
+                                let v = input.value();
+                                cfg.download.cookies_path = if v.is_empty() { None } else { Some(v) };
+                                config.set(Some(cfg));
+                            })} />
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Rate Limit (requests/hour, guest)" }</label>
+                        <input type="number" value={c.download.rate_limit.to_string()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                if let Ok(v) = input.value().parse() {
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.download.rate_limit = v;
+                                    config.set(Some(cfg));
+                                }
+                            })} />
+                    </div>
+                    <div class="form-group">
+                        <label>{ "Rate Limit (requests/hour, with cookies)" }</label>
+                        <input type="number" value={c.download.rate_limit_auth.to_string()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                if let Ok(v) = input.value().parse() {
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.download.rate_limit_auth = v;
+                                    config.set(Some(cfg));
+                                }
+                            })} />
+                    </div>
+                </div>
+
+                // Indexing
+                <div class="card">
+                    <h3>{ "Indexing" }</h3>
+                    <div class="form-group">
+                        <label>{ "Concurrency (file processors)" }</label>
+                        <input type="number" min="1" max="32" value={c.indexing.concurrency.to_string()}
+                            oninput={let config = config.clone(); Callback::from(move |e: InputEvent| {
+                                let input: HtmlInputElement = e.target_unchecked_into();
+                                if let Ok(v) = input.value().parse() {
+                                    let mut cfg = (*config).clone().unwrap();
+                                    cfg.indexing.concurrency = v;
+                                    config.set(Some(cfg));
+                                }
+                            })} />
+                    </div>
+                </div>
+
+                <button type="submit" class="btn btn-primary">{ "Save Settings" }</button>
+            </form>
         </div>
     }
 }

frontend/src/types.rs

@@ -240,10 +240,58 @@ pub struct SyncStats {
 
 // --- Config ---
 
-#[derive(Debug, Clone, PartialEq, Deserialize)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 pub struct AppConfig {
     pub library_path: String,
     pub database_url: String,
     pub download_path: String,
     pub organization_format: String,
+    #[serde(default)]
+    pub allowed_secondary_types: Vec<String>,
+    #[serde(default)]
+    pub web: WebConfigFe,
+    #[serde(default)]
+    pub tagging: TaggingConfigFe,
+    #[serde(default)]
+    pub download: DownloadConfigFe,
+    #[serde(default)]
+    pub indexing: IndexingConfigFe,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Default)]
+pub struct WebConfigFe {
+    #[serde(default)]
+    pub port: u16,
+    #[serde(default)]
+    pub bind: String,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Default)]
+pub struct TaggingConfigFe {
+    #[serde(default)]
+    pub auto_tag: bool,
+    #[serde(default)]
+    pub write_tags: bool,
+    #[serde(default)]
+    pub confidence: f64,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Default)]
+pub struct DownloadConfigFe {
+    #[serde(default)]
+    pub format: String,
+    #[serde(default)]
+    pub search_source: String,
+    #[serde(default)]
+    pub cookies_path: Option<String>,
+    #[serde(default)]
+    pub rate_limit: u32,
+    #[serde(default)]
+    pub rate_limit_auth: u32,
+}
+
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize, Default)]
+pub struct IndexingConfigFe {
+    #[serde(default)]
+    pub concurrency: usize,
 }

frontend/style.css

@@ -125,6 +125,14 @@ input:focus, select:focus { outline: none; border-color: var(--accent); }
 .search-bar input { flex: 1; }
 .search-bar select { width: auto; min-width: 120px; }
 
+/* Form groups */
+.form-group { margin-bottom: 0.75rem; }
+.form-group label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 0.25rem; }
+.form-group input[type="number"] { width: 150px; }
+.form-group select { width: auto; min-width: 150px; }
+.checkbox-label { display: flex; align-items: center; gap: 0.5rem; cursor: pointer; }
+.checkbox-label input[type="checkbox"] { width: auto; }
+
 /* Badges */
 .badge {
     display: inline-block;

src/config.rs

@@ -1,210 +1 @@
-use std::path::PathBuf;
+pub use shanty_config::*;
-
-use serde::{Deserialize, Serialize};
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct AppConfig {
-    #[serde(default = "default_library_path")]
-    pub library_path: PathBuf,
-
-    #[serde(default = "default_database_url")]
-    pub database_url: String,
-
-    #[serde(default = "default_download_path")]
-    pub download_path: PathBuf,
-
-    #[serde(default = "default_organization_format")]
-    pub organization_format: String,
-
-    /// Which secondary release group types to include. Empty = studio releases only.
-    /// Options: "Compilation", "Live", "Soundtrack", "Remix", "DJ-mix", "Demo", etc.
-    #[serde(default)]
-    pub allowed_secondary_types: Vec<String>,
-
-    #[serde(default)]
-    pub web: WebConfig,
-
-    #[serde(default)]
-    pub tagging: TaggingConfig,
-
-    #[serde(default)]
-    pub download: DownloadConfig,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct WebConfig {
-    #[serde(default = "default_port")]
-    pub port: u16,
-
-    #[serde(default = "default_bind")]
-    pub bind: String,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct TaggingConfig {
-    #[serde(default)]
-    pub auto_tag: bool,
-
-    #[serde(default = "default_true")]
-    pub write_tags: bool,
-
-    #[serde(default = "default_confidence")]
-    pub confidence: f64,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct DownloadConfig {
-    #[serde(default = "default_format")]
-    pub format: String,
-
-    #[serde(default = "default_search_source")]
-    pub search_source: String,
-
-    #[serde(default)]
-    pub cookies_path: Option<PathBuf>,
-}
-
-impl Default for AppConfig {
-    fn default() -> Self {
-        Self {
-            library_path: default_library_path(),
-            database_url: default_database_url(),
-            download_path: default_download_path(),
-            organization_format: default_organization_format(),
-            allowed_secondary_types: vec![], // empty = studio only
-            web: WebConfig::default(),
-            tagging: TaggingConfig::default(),
-            download: DownloadConfig::default(),
-        }
-    }
-}
-
-impl Default for WebConfig {
-    fn default() -> Self {
-        Self {
-            port: default_port(),
-            bind: default_bind(),
-        }
-    }
-}
-
-impl Default for TaggingConfig {
-    fn default() -> Self {
-        Self {
-            auto_tag: false,
-            write_tags: true,
-            confidence: default_confidence(),
-        }
-    }
-}
-
-impl Default for DownloadConfig {
-    fn default() -> Self {
-        Self {
-            format: default_format(),
-            search_source: default_search_source(),
-            cookies_path: None,
-        }
-    }
-}
-
-fn default_library_path() -> PathBuf {
-    dirs::audio_dir().unwrap_or_else(|| PathBuf::from("~/Music"))
-}
-
-fn default_database_url() -> String {
-    let data_dir = dirs::data_dir()
-        .unwrap_or_else(|| PathBuf::from("."))
-        .join("shanty");
-    std::fs::create_dir_all(&data_dir).ok();
-    format!("sqlite://{}?mode=rwc", data_dir.join("shanty.db").display())
-}
-
-fn default_download_path() -> PathBuf {
-    let dir = dirs::data_dir()
-        .unwrap_or_else(|| PathBuf::from("."))
-        .join("shanty")
-        .join("downloads");
-    std::fs::create_dir_all(&dir).ok();
-    dir
-}
-
-fn default_organization_format() -> String {
-    shanty_org::DEFAULT_FORMAT.to_string()
-}
-
-fn default_port() -> u16 {
-    8085
-}
-fn default_bind() -> String {
-    "0.0.0.0".to_string()
-}
-fn default_confidence() -> f64 {
-    0.8
-}
-fn default_format() -> String {
-    "opus".to_string()
-}
-fn default_search_source() -> String {
-    "ytmusic".to_string()
-}
-fn default_true() -> bool {
-    true
-}
-
-impl AppConfig {
-    /// Load config from file, falling back to defaults.
-    pub fn load(path: Option<&str>) -> Self {
-        let config_path = path
-            .map(PathBuf::from)
-            .or_else(|| std::env::var("SHANTY_CONFIG").ok().map(PathBuf::from))
-            .unwrap_or_else(|| {
-                dirs::config_dir()
-                    .unwrap_or_else(|| PathBuf::from("."))
-                    .join("shanty")
-                    .join("config.yaml")
-            });
-
-        if config_path.exists() {
-            match std::fs::read_to_string(&config_path) {
-                Ok(contents) => match serde_yaml::from_str(&contents) {
-                    Ok(config) => {
-                        tracing::info!(path = %config_path.display(), "loaded config");
-                        return Self::apply_env_overrides(config);
-                    }
-                    Err(e) => {
-                        tracing::warn!(path = %config_path.display(), error = %e, "failed to parse config, using defaults");
-                    }
-                },
-                Err(e) => {
-                    tracing::warn!(path = %config_path.display(), error = %e, "failed to read config, using defaults");
-                }
-            }
-        } else {
-            tracing::info!(path = %config_path.display(), "no config file found, using defaults");
-        }
-
-        Self::apply_env_overrides(AppConfig::default())
-    }
-
-    fn apply_env_overrides(mut config: Self) -> Self {
-        if let Ok(v) = std::env::var("SHANTY_DATABASE_URL") {
-            config.database_url = v;
-        }
-        if let Ok(v) = std::env::var("SHANTY_LIBRARY_PATH") {
-            config.library_path = PathBuf::from(v);
-        }
-        if let Ok(v) = std::env::var("SHANTY_DOWNLOAD_PATH") {
-            config.download_path = PathBuf::from(v);
-        }
-        if let Ok(v) = std::env::var("SHANTY_WEB_PORT") {
-            if let Ok(port) = v.parse() {
-                config.web.port = port;
-            }
-        }
-        if let Ok(v) = std::env::var("SHANTY_WEB_BIND") {
-            config.web.bind = v;
-        }
-        config
-    }
-}

src/main.rs

@@ -58,11 +58,13 @@ async fn main() -> anyhow::Result<()> {
     let bind = format!("{}:{}", config.web.bind, config.web.port);
     tracing::info!(bind = %bind, "starting server");
 
+    let config_path = cli.config.clone();
     let state = web::Data::new(AppState {
         db,
         mb_client,
         search,
-        config,
+        config: std::sync::Arc::new(tokio::sync::RwLock::new(config)),
+        config_path: config_path,
         tasks: TaskManager::new(),
     });
 

src/routes/artists.rs

@@ -301,7 +301,7 @@ pub async fn enrich_artist(
     // Fetch release groups and filter by allowed secondary types
     let all_release_groups = state.search.get_release_groups(&mbid).await
         .map_err(|e| ApiError::Internal(e.to_string()))?;
-    let allowed = &state.config.allowed_secondary_types;
+    let allowed = state.config.read().await.allowed_secondary_types.clone();
     let release_groups: Vec<_> = all_release_groups
         .into_iter()
         .filter(|rg| {

src/routes/downloads.rs

@@ -88,13 +88,14 @@ async fn trigger_process(
     let tid = task_id.clone();
 
     tokio::spawn(async move {
-        let cookies = state.config.download.cookies_path.clone();
+        let cfg = state.config.read().await.clone();
-        let format: shanty_dl::AudioFormat = state.config.download.format.parse().unwrap_or(shanty_dl::AudioFormat::Opus);
+        let cookies = cfg.download.cookies_path.clone();
-        let source: shanty_dl::SearchSource = state.config.download.search_source.parse().unwrap_or(shanty_dl::SearchSource::YouTubeMusic);
+        let format: shanty_dl::AudioFormat = cfg.download.format.parse().unwrap_or(shanty_dl::AudioFormat::Opus);
-        let rate = if cookies.is_some() { 1800 } else { 450 };
+        let source: shanty_dl::SearchSource = cfg.download.search_source.parse().unwrap_or(shanty_dl::SearchSource::YouTubeMusic);
+        let rate = if cookies.is_some() { cfg.download.rate_limit_auth } else { cfg.download.rate_limit };
         let backend = shanty_dl::YtDlpBackend::new(rate, source, cookies.clone());
         let backend_config = shanty_dl::BackendConfig {
-            output_dir: state.config.download_path.clone(),
+            output_dir: cfg.download_path.clone(),
             format,
             cookies_path: cookies,
         };

src/routes/system.rs

@@ -1,8 +1,10 @@
 use actix_web::{web, HttpResponse};
+use serde::Deserialize;
 
 use shanty_db::entities::download_queue::DownloadStatus;
 use shanty_db::queries;
 
+use crate::config::AppConfig;
 use crate::error::ApiError;
 use crate::routes::artists::enrich_all_watched_artists;
 use crate::state::AppState;
@@ -16,7 +18,11 @@ pub fn configure(cfg: &mut web::ServiceConfig) {
         .service(web::resource("/tasks/{id}").route(web::get().to(get_task)))
         .service(web::resource("/watchlist").route(web::get().to(list_watchlist)))
         .service(web::resource("/watchlist/{id}").route(web::delete().to(remove_watchlist)))
-        .service(web::resource("/config").route(web::get().to(get_config)));
+        .service(
+            web::resource("/config")
+                .route(web::get().to(get_config))
+                .route(web::put().to(save_config)),
+        );
 }
 
 async fn get_status(
@@ -28,13 +34,11 @@ async fn get_status(
     let failed_items = queries::downloads::list(state.db.conn(), Some(DownloadStatus::Failed)).await?;
     let tasks = state.tasks.list();
 
-    // Combine active/recent download items for the dashboard
     let mut queue_items = Vec::new();
     queue_items.extend(downloading_items.iter().cloned());
     queue_items.extend(pending_items.iter().cloned());
     queue_items.extend(failed_items.iter().take(5).cloned());
 
-    // Tracks needing metadata (tagging queue)
     let needs_tagging = queries::tracks::get_needing_metadata(state.db.conn()).await?;
 
     Ok(HttpResponse::Ok().json(serde_json::json!({
@@ -61,11 +65,12 @@ async fn trigger_index(
     let tid = task_id.clone();
 
     tokio::spawn(async move {
+        let cfg = state.config.read().await.clone();
         state.tasks.update_progress(&tid, 0, 0, "Scanning library...");
         let scan_config = shanty_index::ScanConfig {
-            root: state.config.library_path.clone(),
+            root: cfg.library_path.clone(),
             dry_run: false,
-            concurrency: 4,
+            concurrency: cfg.indexing.concurrency,
         };
         match shanty_index::run_scan(state.db.conn(), &scan_config).await {
             Ok(stats) => state.tasks.complete(&tid, format!("{stats}")),
@@ -84,6 +89,7 @@ async fn trigger_tag(
     let tid = task_id.clone();
 
     tokio::spawn(async move {
+        let cfg = state.config.read().await.clone();
         state.tasks.update_progress(&tid, 0, 0, "Preparing tagger...");
         let mb = match shanty_tag::MusicBrainzClient::new() {
             Ok(c) => c,
@@ -94,8 +100,8 @@ async fn trigger_tag(
         };
         let tag_config = shanty_tag::TagConfig {
             dry_run: false,
-            write_tags: state.config.tagging.write_tags,
+            write_tags: cfg.tagging.write_tags,
-            confidence: state.config.tagging.confidence,
+            confidence: cfg.tagging.confidence,
         };
         state.tasks.update_progress(&tid, 0, 0, "Tagging tracks...");
         match shanty_tag::run_tagging(state.db.conn(), &mb, &tag_config, None).await {
@@ -115,16 +121,16 @@ async fn trigger_organize(
     let tid = task_id.clone();
 
     tokio::spawn(async move {
+        let cfg = state.config.read().await.clone();
         state.tasks.update_progress(&tid, 0, 0, "Organizing files...");
         let org_config = shanty_org::OrgConfig {
-            target_dir: state.config.library_path.clone(),
+            target_dir: cfg.library_path.clone(),
-            format: state.config.organization_format.clone(),
+            format: cfg.organization_format.clone(),
             dry_run: false,
             copy: false,
         };
         match shanty_org::organize_from_db(state.db.conn(), &org_config).await {
             Ok(stats) => {
-                // Promote all Downloaded wanted items to Owned
                 let promoted = queries::wanted::promote_downloaded_to_owned(state.db.conn())
                     .await
                     .unwrap_or(0);
@@ -134,7 +140,6 @@ async fn trigger_organize(
                     format!("{stats}")
                 };
                 state.tasks.complete(&tid, msg);
-                // Refresh artist data in background
                 let _ = enrich_all_watched_artists(&state).await;
             }
             Err(e) => state.tasks.fail(&tid, e.to_string()),
@@ -147,7 +152,6 @@ async fn trigger_organize(
 async fn trigger_pipeline(
     state: web::Data<AppState>,
 ) -> Result<HttpResponse, ApiError> {
-    // Register all 6 pipeline tasks as Pending
     let sync_id = state.tasks.register_pending("sync");
     let download_id = state.tasks.register_pending("download");
     let index_id = state.tasks.register_pending("index");
@@ -167,6 +171,8 @@ async fn trigger_pipeline(
     let state = state.clone();
 
     tokio::spawn(async move {
+        let cfg = state.config.read().await.clone();
+
         // Step 1: Sync
         state.tasks.start(&sync_id);
         state.tasks.update_progress(&sync_id, 0, 0, "Syncing watchlist to download queue...");
@@ -177,13 +183,13 @@ async fn trigger_pipeline(
 
         // Step 2: Download
         state.tasks.start(&download_id);
-        let cookies = state.config.download.cookies_path.clone();
+        let cookies = cfg.download.cookies_path.clone();
-        let format: shanty_dl::AudioFormat = state.config.download.format.parse().unwrap_or(shanty_dl::AudioFormat::Opus);
+        let format: shanty_dl::AudioFormat = cfg.download.format.parse().unwrap_or(shanty_dl::AudioFormat::Opus);
-        let source: shanty_dl::SearchSource = state.config.download.search_source.parse().unwrap_or(shanty_dl::SearchSource::YouTubeMusic);
+        let source: shanty_dl::SearchSource = cfg.download.search_source.parse().unwrap_or(shanty_dl::SearchSource::YouTubeMusic);
-        let rate = if cookies.is_some() { 1800 } else { 450 };
+        let rate = if cookies.is_some() { cfg.download.rate_limit_auth } else { cfg.download.rate_limit };
         let backend = shanty_dl::YtDlpBackend::new(rate, source, cookies.clone());
         let backend_config = shanty_dl::BackendConfig {
-            output_dir: state.config.download_path.clone(),
+            output_dir: cfg.download_path.clone(),
             format,
             cookies_path: cookies,
         };
@@ -204,9 +210,9 @@ async fn trigger_pipeline(
         state.tasks.start(&index_id);
         state.tasks.update_progress(&index_id, 0, 0, "Scanning library...");
         let scan_config = shanty_index::ScanConfig {
-            root: state.config.library_path.clone(),
+            root: cfg.library_path.clone(),
             dry_run: false,
-            concurrency: 4,
+            concurrency: cfg.indexing.concurrency,
         };
         match shanty_index::run_scan(state.db.conn(), &scan_config).await {
             Ok(stats) => state.tasks.complete(&index_id, format!("{stats}")),
@@ -220,8 +226,8 @@ async fn trigger_pipeline(
             Ok(mb) => {
                 let tag_config = shanty_tag::TagConfig {
                     dry_run: false,
-                    write_tags: state.config.tagging.write_tags,
+                    write_tags: cfg.tagging.write_tags,
-                    confidence: state.config.tagging.confidence,
+                    confidence: cfg.tagging.confidence,
                 };
                 match shanty_tag::run_tagging(state.db.conn(), &mb, &tag_config, None).await {
                     Ok(stats) => state.tasks.complete(&tag_id, format!("{stats}")),
@@ -235,8 +241,8 @@ async fn trigger_pipeline(
         state.tasks.start(&organize_id);
         state.tasks.update_progress(&organize_id, 0, 0, "Organizing files...");
         let org_config = shanty_org::OrgConfig {
-            target_dir: state.config.library_path.clone(),
+            target_dir: cfg.library_path.clone(),
-            format: state.config.organization_format.clone(),
+            format: cfg.organization_format.clone(),
             dry_run: false,
             copy: false,
         };
@@ -254,7 +260,7 @@ async fn trigger_pipeline(
             Err(e) => state.tasks.fail(&organize_id, e.to_string()),
         }
 
-        // Step 6: Enrich — refresh cached artist totals for the library page
+        // Step 6: Enrich
         state.tasks.start(&enrich_id);
         state.tasks.update_progress(&enrich_id, 0, 0, "Refreshing artist data...");
         match enrich_all_watched_artists(&state).await {
@@ -296,5 +302,30 @@ async fn remove_watchlist(
 async fn get_config(
     state: web::Data<AppState>,
 ) -> Result<HttpResponse, ApiError> {
-    Ok(HttpResponse::Ok().json(&state.config))
+    let config = state.config.read().await;
+    Ok(HttpResponse::Ok().json(&*config))
+}
+
+#[derive(Deserialize)]
+struct SaveConfigRequest {
+    #[serde(flatten)]
+    config: AppConfig,
+}
+
+async fn save_config(
+    state: web::Data<AppState>,
+    body: web::Json<SaveConfigRequest>,
+) -> Result<HttpResponse, ApiError> {
+    let new_config = body.into_inner().config;
+
+    // Persist to YAML
+    new_config.save(state.config_path.as_deref())
+        .map_err(|e| ApiError::Internal(e))?;
+
+    // Update in-memory config
+    let mut config = state.config.write().await;
+    *config = new_config.clone();
+
+    tracing::info!("config updated via API");
+    Ok(HttpResponse::Ok().json(&new_config))
 }

src/state.rs

@@ -1,3 +1,6 @@
+use std::sync::Arc;
+use tokio::sync::RwLock;
+
 use shanty_db::Database;
 use shanty_search::MusicBrainzSearch;
 use shanty_tag::MusicBrainzClient;
@@ -9,6 +12,7 @@ pub struct AppState {
     pub db: Database,
     pub mb_client: MusicBrainzClient,
     pub search: MusicBrainzSearch,
-    pub config: AppConfig,
+    pub config: Arc<RwLock<AppConfig>>,
+    pub config_path: Option<String>,
     pub tasks: TaskManager,
 }