diff --git a/src-tauri/src/app_state.rs b/src-tauri/src/app_state.rs
new file mode 100644
index 0000000..225b504
--- /dev/null
+++ b/src-tauri/src/app_state.rs
@@ -0,0 +1,83 @@
+use std::sync::Mutex;
+
+use serde::{Deserialize, Serialize};
+
+use crate::audio::{RecordingSession, RecordingStatus};
+use crate::models::{model_statuses, ModelWithStatus};
+use crate::settings::AppSettings;
+
+#[derive(Debug)]
+pub struct ManagedAppState {
+    pub settings: Mutex<AppSettings>,
+    pub recording: Mutex<RecordingSession>,
+    pub transcript: Mutex<TranscriptDraft>,
+}
+
+#[derive(Debug, Default, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct TranscriptDraft {
+    pub text: String,
+    pub last_message: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "camelCase")]
+pub struct AppSnapshot {
+    pub settings: AppSettings,
+    pub recording_status: RecordingStatus,
+    pub transcript: TranscriptDraft,
+    pub models: Vec<ModelWithStatus>,
+}
+
+impl Default for ManagedAppState {
+    fn default() -> Self {
+        Self {
+            settings: Mutex::new(AppSettings::default()),
+            recording: Mutex::new(RecordingSession::default()),
+            transcript: Mutex::new(TranscriptDraft::default()),
+        }
+    }
+}
+
+impl ManagedAppState {
+    pub fn snapshot(&self) -> Result<AppSnapshot, String> {
+        let settings = self
+            .settings
+            .lock()
+            .map_err(|_| "falha ao acessar configurações".to_string())?
+            .clone();
+        let recording_status = self
+            .recording
+            .lock()
+            .map_err(|_| "falha ao acessar estado de gravação".to_string())?
+            .status
+            .clone();
+        let transcript = self
+            .transcript
+            .lock()
+            .map_err(|_| "falha ao acessar transcrição".to_string())?
+            .clone();
+
+        Ok(AppSnapshot {
+            settings,
+            recording_status,
+            transcript,
+            models: model_statuses(),
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn default_snapshot_starts_idle() {
+        let state = ManagedAppState::default();
+        let snapshot = state.snapshot().expect("snapshot should work");
+
+        assert_eq!(snapshot.recording_status, RecordingStatus::Idle);
+        assert!(snapshot.transcript.text.is_empty());
+        assert_eq!(snapshot.models.len(), 1);
+    }
+}
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 39f56de..89bb0da 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,13 +1,29 @@
-#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub mod app_state;
 pub mod audio;
 pub mod error;
 pub mod injection;
 pub mod models;
 pub mod settings;
 pub mod transcription;
+pub mod ui_commands;
+
+use app_state::ManagedAppState;
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
+        .manage(ManagedAppState::default())
+        .invoke_handler(tauri::generate_handler![
+            ui_commands::get_app_snapshot,
+            ui_commands::start_recording,
+            ui_commands::stop_recording_and_transcribe,
+            ui_commands::copy_ready_text,
+            ui_commands::request_insert_text,
+            ui_commands::list_models,
+            ui_commands::get_settings,
+            ui_commands::save_settings
+        ])
         .run(tauri::generate_context!())
         .expect("erro ao executar o aplicativo Tauri");
 }
diff --git a/src-tauri/src/ui_commands.rs b/src-tauri/src/ui_commands.rs
new file mode 100644
index 0000000..faa7607
--- /dev/null
+++ b/src-tauri/src/ui_commands.rs
@@ -0,0 +1,136 @@
+use std::path::PathBuf;
+
+use tauri::State;
+
+use crate::app_state::{AppSnapshot, ManagedAppState};
+use crate::injection::{FallbackInjector, InsertMethod, InsertRequest, InsertResult, TextInjector};
+use crate::models::{model_statuses, ModelWithStatus};
+use crate::settings::AppSettings;
+use crate::transcription::crispasr::{CrispAsrConfig, CrispAsrTranscriber};
+use crate::transcription::{Transcriber, TranscriptionInput, TranscriptionOptions};
+
+#[tauri::command]
+pub(crate) fn get_app_snapshot(state: State<'_, ManagedAppState>) -> Result<AppSnapshot, String> {
+    state.snapshot()
+}
+
+#[tauri::command]
+pub(crate) fn start_recording(state: State<'_, ManagedAppState>) -> Result<AppSnapshot, String> {
+    state
+        .recording
+        .lock()
+        .map_err(|_| "falha ao acessar estado de gravação".to_string())?
+        .start()
+        .map_err(String::from)?;
+
+    state.snapshot()
+}
+
+#[tauri::command]
+pub(crate) fn stop_recording_and_transcribe(
+    state: State<'_, ManagedAppState>,
+) -> Result<AppSnapshot, String> {
+    let sequence = state
+        .recording
+        .lock()
+        .map_err(|_| "falha ao acessar estado de gravação".to_string())?
+        .stop()
+        .map_err(String::from)?;
+
+    let settings = state
+        .settings
+        .lock()
+        .map_err(|_| "falha ao acessar configurações".to_string())?
+        .clone();
+
+    let transcriber = CrispAsrTranscriber::new(CrispAsrConfig {
+        sidecar_name: None,
+        model_path: None,
+    });
+
+    let result = transcriber.transcribe(TranscriptionInput {
+        audio_path: PathBuf::from(format!("recording-{sequence}.wav")),
+        options: TranscriptionOptions {
+            model_id: settings.transcription.model_id,
+            language: settings.transcription.language,
+            timestamps: false,
+        },
+    });
+
+    let mut transcript = state
+        .transcript
+        .lock()
+        .map_err(|_| "falha ao acessar transcrição".to_string())?;
+
+    match result {
+        Ok(result) => {
+            transcript.text = result.text;
+            transcript.last_message = Some("Transcrição concluída.".to_string());
+        }
+        Err(error) => {
+            transcript.text = "".to_string();
+            transcript.last_message = Some(error.to_string());
+        }
+    }
+
+    drop(transcript);
+    state.snapshot()
+}
+
+#[tauri::command]
+pub(crate) fn copy_ready_text(state: State<'_, ManagedAppState>) -> Result<String, String> {
+    let transcript = state
+        .transcript
+        .lock()
+        .map_err(|_| "falha ao acessar transcrição".to_string())?;
+
+    Ok(transcript.text.clone())
+}
+
+#[tauri::command]
+pub(crate) fn request_insert_text(
+    text: String,
+    state: State<'_, ManagedAppState>,
+) -> Result<InsertResult, String> {
+    let injector = FallbackInjector;
+    let result = injector.insert_text(InsertRequest {
+        text,
+        target: None,
+        method: InsertMethod::ClipboardPaste,
+    });
+
+    state
+        .transcript
+        .lock()
+        .map_err(|_| "falha ao acessar transcrição".to_string())?
+        .last_message = Some(result.message.clone());
+
+    Ok(result)
+}
+
+#[tauri::command]
+pub(crate) fn list_models() -> Vec<ModelWithStatus> {
+    model_statuses()
+}
+
+#[tauri::command]
+pub(crate) fn get_settings(state: State<'_, ManagedAppState>) -> Result<AppSettings, String> {
+    state
+        .settings
+        .lock()
+        .map_err(|_| "falha ao acessar configurações".to_string())
+        .map(|settings| settings.clone())
+}
+
+#[tauri::command]
+pub(crate) fn save_settings(
+    settings: AppSettings,
+    state: State<'_, ManagedAppState>,
+) -> Result<AppSettings, String> {
+    *state
+        .settings
+        .lock()
+        .map_err(|_| "falha ao acessar configurações".to_string())? = settings.clone();
+
+    Ok(settings)
+}