diff --git a/crates/jarvis-app/src/app.rs b/crates/jarvis-app/src/app.rs
index 032e0e6..c87040d 100644
--- a/crates/jarvis-app/src/app.rs
+++ b/crates/jarvis-app/src/app.rs
@@ -2,7 +2,6 @@ use std::sync::mpsc::Receiver;
 use std::time::SystemTime;
 
 use jarvis_core::{audio_buffer::AudioRingBuffer, audio_processing, audio_processing::vad::listen_window::{ListenWindow, WindowDecision}, audio_processing::vad::webrtc::WebRtcVad, commands, config, listener, recorder, stt, COMMANDS_LIST, intent, voices, ipc::{self, IpcEvent}, i18n, slots};
-use rand::seq::SliceRandom;
 
 use crate::should_stop;
 
diff --git a/crates/jarvis-app/src/main.rs b/crates/jarvis-app/src/main.rs
index 2b5b985..3928638 100644
--- a/crates/jarvis-app/src/main.rs
+++ b/crates/jarvis-app/src/main.rs
@@ -240,7 +240,6 @@ fn main() -> Result<(), String> {
                     version: config::APP_VERSION.map(|s| s.to_string()),
                 });
             }
-            _ => {}
         }
     });
 
diff --git a/crates/jarvis-app/src/tray.rs b/crates/jarvis-app/src/tray.rs
index 499d278..dafa014 100644
--- a/crates/jarvis-app/src/tray.rs
+++ b/crates/jarvis-app/src/tray.rs
@@ -7,10 +7,8 @@ use tray_icon::{
 use image;
 use std::process::Command;
 
-#[cfg(target_os="windows")]
-use winit::platform::windows::EventLoopBuilderExtWindows;
 
-use jarvis_core::{config, i18n, voices, ipc::{self, IpcEvent}, SettingsManager};
+use jarvis_core::{i18n, voices, ipc::{self, IpcEvent}, SettingsManager};
 
 const TRAY_ICON_BYTES: &[u8] = include_bytes!("../../../resources/icons/32x32.png");
 
@@ -29,6 +27,7 @@ pub fn init_blocking(settings: SettingsManager) {
         .unwrap();
 
     let menu_channel = MenuEvent::receiver();
+    info!("Tray initialized.");
 
     #[cfg(target_os = "linux")]
     {
@@ -77,8 +76,6 @@ pub fn init_blocking(settings: SettingsManager) {
             std::thread::sleep(std::time::Duration::from_millis(50));
         }
     }
-
-    info!("Tray initialized.");
 }
 
 fn handle_menu_event(event: &MenuEvent, settings: &SettingsManager, tray_state: &menu::TrayState) {
diff --git a/crates/jarvis-app/src/tray/menu.rs b/crates/jarvis-app/src/tray/menu.rs
index ed2c158..bfdd5a7 100644
--- a/crates/jarvis-app/src/tray/menu.rs
+++ b/crates/jarvis-app/src/tray/menu.rs
@@ -1,7 +1,6 @@
 use tray_icon::menu::{CheckMenuItem, Menu, MenuItem, PredefinedMenuItem, Submenu};
 
 use jarvis_core::{i18n, voices, SettingsManager};
-use jarvis_core::config::structs::{WakeWordEngine, NoiseSuppressionBackend};
 
 // RADIO GROUP
 
diff --git a/crates/jarvis-core/src/i18n.rs b/crates/jarvis-core/src/i18n.rs
index 0dfa52c..8a78fe1 100644
--- a/crates/jarvis-core/src/i18n.rs
+++ b/crates/jarvis-core/src/i18n.rs
@@ -1,4 +1,4 @@
-use fluent_bundle::{FluentBundle, FluentResource, FluentArgs, FluentValue};
+use fluent_bundle::{FluentResource, FluentArgs, FluentValue};
 use fluent_bundle::concurrent::FluentBundle as ConcurrentFluentBundle;
 use once_cell::sync::OnceCell;
 use parking_lot::RwLock;
diff --git a/crates/jarvis-core/src/llm/history.rs b/crates/jarvis-core/src/llm/history.rs
index ffb5261..89d6176 100644
--- a/crates/jarvis-core/src/llm/history.rs
+++ b/crates/jarvis-core/src/llm/history.rs
@@ -1,6 +1,6 @@
 use super::client::ChatMessage;
 use std::fs;
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 pub struct ConversationHistory {
     system: Option<ChatMessage>,
diff --git a/crates/jarvis-gui/src/events.rs b/crates/jarvis-gui/src/events.rs
index 1d6a424..548d731 100644
--- a/crates/jarvis-gui/src/events.rs
+++ b/crates/jarvis-gui/src/events.rs
@@ -1,6 +1,9 @@
 use tauri::Emitter;
 
 // the payload type must implement `Serialize` and `Clone`.
+// Kept around as the canonical shape for future event emitter wiring even
+// though nothing currently emits one — silence the dead-code lint.
+#[allow(dead_code)]
 #[derive(Clone, serde::Serialize)]
 pub struct Payload {
     pub data: String,
@@ -16,6 +19,7 @@ pub enum EventTypes {
     CommandEnd,
 }
 
+#[allow(dead_code)]
 impl EventTypes {
     pub fn get(&self) -> &str {
         match self {
@@ -29,6 +33,7 @@ impl EventTypes {
     }
 }
 
+#[allow(dead_code)]
 pub fn play(phrase: &str, app_handle: &tauri::AppHandle) {
     app_handle
         .emit(
diff --git a/crates/jarvis-gui/src/main.rs b/crates/jarvis-gui/src/main.rs
index 004092f..a66a190 100644
--- a/crates/jarvis-gui/src/main.rs
+++ b/crates/jarvis-gui/src/main.rs
@@ -3,7 +3,6 @@
 
 use jarvis_core::{config, db, i18n, voices, DB, SettingsManager};
 
-#[macro_use]
 extern crate simple_log;
 
 mod events;
diff --git a/crates/jarvis-gui/src/tauri_commands/backends.rs b/crates/jarvis-gui/src/tauri_commands/backends.rs
index 802f7c5..416b997 100644
--- a/crates/jarvis-gui/src/tauri_commands/backends.rs
+++ b/crates/jarvis-gui/src/tauri_commands/backends.rs
@@ -46,8 +46,22 @@ pub fn set_llm_backend(name: String) -> Result<String, String> {
 
 /// Set TTS backend. Persists to settings DB AND hot-swaps the live process
 /// (in the GUI process; the running daemon picks it up via IPC SwitchTts).
+///
+/// Returns a struct describing what ACTUALLY happened — `requested` is what
+/// the user asked for, `applied` is what the engine actually installed. They
+/// differ when, e.g., Piper was requested but `piper.exe` isn't on disk; the
+/// engine falls back to SAPI to keep speech working, and the GUI shows a
+/// warning instead of pretending the swap succeeded.
+#[derive(Serialize)]
+pub struct TtsSwapResult {
+    pub requested: String,
+    pub applied: String,
+    pub fell_back: bool,
+    pub note: Option<String>,
+}
+
 #[tauri::command]
-pub fn set_tts_backend(name: String) -> Result<String, String> {
+pub fn set_tts_backend(name: String) -> Result<TtsSwapResult, String> {
     let normalized = match name.trim().to_lowercase().as_str() {
         "" | "auto" => "".to_string(),
         "sapi" | "piper" | "silero" => name.to_lowercase(),
@@ -67,18 +81,34 @@ pub fn set_tts_backend(name: String) -> Result<String, String> {
         return Err("settings DB not initialised".into());
     }
 
-    // 2. Apply RIGHT NOW in this GUI process (best-effort — log on failure
-    //    but don't fail the call, the DB change already happened).
-    let apply_target = if normalized.is_empty() { "auto" } else { normalized.as_str() };
-    if let Err(e) = jarvis_core::tts::swap_to(apply_target) {
-        log::warn!("TTS hot-swap in GUI failed (DB still updated): {}", e);
-    }
+    // 2. Apply RIGHT NOW in this GUI process AND report what actually got
+    //    installed. The fallback path in build_backend() may silently swap
+    //    Piper→SAPI when the Piper binary is missing; without surfacing that
+    //    the user sees "saved" but the active engine label stays SAPI and
+    //    they don't know why.
+    let requested = if normalized.is_empty() { "auto".to_string() } else { normalized.clone() };
+    let applied = match jarvis_core::tts::swap_to(&requested) {
+        Ok(name) => name.to_string(),
+        Err(e) => {
+            log::warn!("TTS hot-swap failed: {}", e);
+            jarvis_core::tts::backend().name().to_string()
+        }
+    };
 
-    // 3. The running jarvis-app daemon is a SEPARATE process with its own
-    //    TTS instance; it picks up the change via the IpcAction::SwitchTts
-    //    message — fired from the Svelte page via sendAction() WebSocket.
+    let fell_back = applied.eq_ignore_ascii_case("sapi")
+        && !requested.eq_ignore_ascii_case("sapi")
+        && requested != "auto";
+    let note = if fell_back {
+        Some(match requested.as_str() {
+            "piper" => "Piper не установлен. Запусти tools/piper/install.ps1 чтобы скачать бинарь и голос.".into(),
+            "silero" => "Silero недоступен. Нужен Python + torch + silero_tts.py helper.".into(),
+            other => format!("'{}' недоступен — откатился на SAPI.", other),
+        })
+    } else {
+        None
+    };
 
-    Ok(if normalized.is_empty() { "auto".into() } else { normalized })
+    Ok(TtsSwapResult { requested, applied, fell_back, note })
 }
 
 /// Reset conversation context (clears LLM history turns, keeps system prompt).
diff --git a/crates/jarvis-gui/src/tauri_commands/sys.rs b/crates/jarvis-gui/src/tauri_commands/sys.rs
index 9bc0b45..d9651fe 100644
--- a/crates/jarvis-gui/src/tauri_commands/sys.rs
+++ b/crates/jarvis-gui/src/tauri_commands/sys.rs
@@ -2,8 +2,6 @@ use sysinfo::{System, Pid, ProcessRefreshKind, RefreshKind, CpuRefreshKind, Comp
 use peak_alloc::PeakAlloc;
 use std::sync::Mutex;
 use once_cell::sync::Lazy;
-use std::process::Command;
-use std::env;
 
 #[global_allocator]
 static PEAK_ALLOC: PeakAlloc = PeakAlloc;
diff --git a/frontend/src/css/styles.scss b/frontend/src/css/styles.scss
index e72001b..d38cc6e 100644
--- a/frontend/src/css/styles.scss
+++ b/frontend/src/css/styles.scss
@@ -61,22 +61,29 @@ a {
     margin: 0;
 }
 
-#header,
-main {
-    padding: 0 30px;
-    // Cap content width on wide monitors so long labels don't stretch
-    // across 1900px+ screens. On smaller windows this is a no-op.
-    max-width: 1280px;
-    margin: 0 auto;
+// Cap the WHOLE app (header + main) to 1280px on wide monitors and centre it,
+// so labels in the nav don't sprawl across 1920px+ screens. The wrapper is
+// `<Container fluid id="wrapper">` from svelteui — fluid keeps it width: 100%
+// inside the viewport, then we shrink the inner content here. Smaller windows
+// are unaffected (max-width is a ceiling, not a floor).
+//
+// `!important` is unfortunate but svelteui's Container emits a width:100%
+// rule that sometimes outweighs ours under HMR. The override is loud and
+// localised — only on the top-level wrapper.
+#wrapper {
+    max-width: 1280px !important;
+    margin: 0 auto !important;
+    box-sizing: border-box;
+}
+
+#header,
+main {
+    padding: 0 30px;
     box-sizing: border-box;
 }
 
-// The home page's arc reactor + status bar can keep their own internal
-// max-width while the page itself can still go full width — the page
-// layout below `main` already handles its own centering via flex.
 .app-container.assist-page {
     width: 100%;
-    max-width: 1280px;
     margin: 0 auto;
 }
 
diff --git a/frontend/src/routes/settings/index.svelte b/frontend/src/routes/settings/index.svelte
index daed11f..aed65a4 100644
--- a/frontend/src/routes/settings/index.svelte
+++ b/frontend/src/routes/settings/index.svelte
@@ -138,12 +138,30 @@
         }
     }
 
+    interface TtsSwapResult {
+        requested: string
+        applied: string
+        fell_back: boolean
+        note: string | null
+    }
+
+    let ttsSwapInfo: TtsSwapResult | null = null
+
     async function applyTtsBackend(target: string) {
+        backendSwapError = ""
+        ttsSwapInfo = null
         try {
             // 1. GUI Tauri command — persists to DB + hot-swaps GUI's TTS.
-            await invoke<string>("set_tts_backend", { name: target })
+            //    Returns the actual installed backend (may differ from
+            //    requested if Piper/Silero unavailable → fell back to SAPI).
+            const res = await invoke<TtsSwapResult>("set_tts_backend", { name: target })
+            ttsSwapInfo = res
             // 2. Tell the running daemon (separate process) to switch too.
             switchDaemonTts(target || "auto")
+            // 3. Refresh the "Активный движок" chip — without this, the user
+            //    saves Piper, sees "saved!", but the active label stays SAPI
+            //    because we never re-read the live engine.
+            await refreshActiveBackends()
         } catch (err) {
             backendSwapError = String(err)
         }
@@ -453,9 +471,31 @@
             >
                 {backendSwapError}
             </Notification>
+            <Space h="md" />
         {/if}
 
-        <Space h="md" />
+        {#if ttsSwapInfo && ttsSwapInfo.fell_back}
+            <Notification
+                title="TTS откатился на {ttsSwapInfo.applied.toUpperCase()}"
+                color="orange"
+                withCloseButton={true}
+                on:close={() => { ttsSwapInfo = null }}
+            >
+                Запросил <strong>{ttsSwapInfo.requested}</strong> — недоступен.
+                {#if ttsSwapInfo.note}<br/>{ttsSwapInfo.note}{/if}
+            </Notification>
+            <Space h="md" />
+        {:else if ttsSwapInfo && !ttsSwapInfo.fell_back}
+            <Notification
+                title="TTS переключён на {ttsSwapInfo.applied.toUpperCase()}"
+                color="teal"
+                withCloseButton={true}
+                on:close={() => { ttsSwapInfo = null }}
+            >
+                Применено сразу — без перезапуска.
+            </Notification>
+            <Space h="md" />
+        {/if}
 
         <InputWrapper label={t('settings-llm-context') || 'Контекст разговора'}>
             <Text size="sm" color="gray">