Add ETA calculation, activity log, keyboard shortcuts, expand format options

- Processing: ETA calculated from elapsed time and progress, per-image log
  entries added to activity log with auto-scroll
- Keyboard shortcuts: Ctrl+Q quit, Ctrl+, settings, Ctrl+?/F1 shortcuts dialog
- Shortcuts dialog: AdwAlertDialog with all keyboard shortcuts listed
- Hamburger menu: added Keyboard Shortcuts entry
- Convert step: added AVIF, GIF, TIFF format options with descriptions
- Resize step: removed duplicate rotate/flip (now in Adjustments step),
  added missing social media presets (PeerTube, Friendica, Funkwhale,
  Instagram Portrait, Facebook Cover/Profile, LinkedIn Cover/Profile,
  TikTok, YouTube Channel Art, Threads, Twitter/X, 4K, etc.)

pixstrip-gtk/src/app.rs

@@ -96,6 +96,14 @@ pub fn build_app() -> adw::Application {
     app.connect_activate(build_ui);
     setup_shortcuts(&app);
 
+    // App-level quit action
+    let quit_action = gtk::gio::SimpleAction::new("quit", None);
+    let app_clone = app.clone();
+    quit_action.connect_activate(move |_, _| {
+        app_clone.quit();
+    });
+    app.add_action(&quit_action);
+
     app
 }
 
@@ -110,6 +118,9 @@ fn setup_shortcuts(app: &adw::Application) {
         );
     }
     app.set_accels_for_action("win.add-files", &["<Control>o"]);
+    app.set_accels_for_action("app.quit", &["<Control>q"]);
+    app.set_accels_for_action("win.show-settings", &["<Control>comma"]);
+    app.set_accels_for_action("win.show-shortcuts", &["<Control>question", "F1"]);
 }
 
 fn build_ui(app: &adw::Application) {
@@ -262,6 +273,7 @@ fn build_menu() -> gtk::gio::Menu {
     let menu = gtk::gio::Menu::new();
     menu.append(Some("Settings"), Some("win.show-settings"));
     menu.append(Some("History"), Some("win.show-history"));
+    menu.append(Some("Keyboard Shortcuts"), Some("win.show-shortcuts"));
     menu
 }
 
@@ -403,6 +415,16 @@ fn setup_window_actions(window: &adw::ApplicationWindow, ui: &WizardUi) {
         action_group.add_action(&action);
     }
 
+    // Keyboard shortcuts window
+    {
+        let window = window.clone();
+        let action = gtk::gio::SimpleAction::new("show-shortcuts", None);
+        action.connect_activate(move |_, _| {
+            show_shortcuts_window(&window);
+        });
+        action_group.add_action(&action);
+    }
+
     // Connect button clicks
     ui.back_button.connect_clicked({
         let action_group = action_group.clone();
@@ -878,6 +900,7 @@ fn run_processing(_window: &adw::ApplicationWindow, ui: &WizardUi) {
 
     // Poll for messages from the processing thread
     let ui_for_rx = ui.clone();
+    let start_time = std::time::Instant::now();
     glib::timeout_add_local(std::time::Duration::from_millis(50), move || {
         while let Ok(msg) = rx.try_recv() {
             match msg {
@@ -890,7 +913,9 @@ fn run_processing(_window: &adw::ApplicationWindow, ui: &WizardUi) {
                         bar.set_fraction(current as f64 / total as f64);
                         bar.set_text(Some(&format!("{}/{} - {}", current, total, file)));
                     }
-                    update_progress_labels(&ui_for_rx.nav_view, current, total, &file);
+                    let eta = calculate_eta(&start_time, current, total);
+                    update_progress_labels(&ui_for_rx.nav_view, current, total, &file, &eta);
+                    add_log_entry(&ui_for_rx.nav_view, current, total, &file);
                 }
                 ProcessingMessage::Done(result) => {
                     show_results(&ui_for_rx, &result);
@@ -1123,19 +1148,63 @@ fn wire_pause_button(page: &adw::NavigationPage) {
     });
 }
 
-fn update_progress_labels(nav_view: &adw::NavigationView, current: usize, total: usize, file: &str) {
+fn calculate_eta(start: &std::time::Instant, current: usize, total: usize) -> String {
+    if current == 0 {
+        return "Estimating time remaining...".into();
+    }
+    let elapsed = start.elapsed().as_secs_f64();
+    let per_image = elapsed / current as f64;
+    let remaining = (total - current) as f64 * per_image;
+    if remaining < 1.0 {
+        "Almost done...".into()
+    } else {
+        format!("ETA: ~{}", format_duration(remaining as u64 * 1000))
+    }
+}
+
+fn update_progress_labels(nav_view: &adw::NavigationView, current: usize, total: usize, file: &str, eta: &str) {
     if let Some(page) = nav_view.visible_page() {
         walk_widgets(&page.child(), &|widget| {
             if let Some(label) = widget.downcast_ref::<gtk::Label>() {
                 if label.css_classes().iter().any(|c| c == "heading")
-                    && label.label().contains("images")
+                    && (label.label().contains("images") || label.label().contains("0 /"))
                 {
                     label.set_label(&format!("{} / {} images", current, total));
                 }
                 if label.css_classes().iter().any(|c| c == "dim-label")
-                    && label.label().contains("Estimating")
+                    && (label.label().contains("Estimating") || label.label().contains("ETA") || label.label().contains("Almost") || label.label().contains("Current"))
                 {
-                    label.set_label(&format!("Current: {}", file));
+                    if current < total {
+                        label.set_label(&format!("{} - {}", eta, file));
+                    } else {
+                        label.set_label("Finishing up...");
+                    }
+                }
+            }
+        });
+    }
+}
+
+fn add_log_entry(nav_view: &adw::NavigationView, current: usize, total: usize, file: &str) {
+    if let Some(page) = nav_view.visible_page() {
+        walk_widgets(&page.child(), &|widget| {
+            if let Some(bx) = widget.downcast_ref::<gtk::Box>()
+                && bx.spacing() == 2
+                && bx.orientation() == gtk::Orientation::Vertical
+            {
+                let entry = gtk::Label::builder()
+                    .label(format!("[{}/{}] {} - Done", current, total, file))
+                    .halign(gtk::Align::Start)
+                    .css_classes(["caption", "monospace"])
+                    .build();
+                bx.append(&entry);
+
+                // Auto-scroll: the log box is inside a ScrolledWindow
+                if let Some(parent) = bx.parent()
+                    && let Some(sw) = parent.downcast_ref::<gtk::ScrolledWindow>()
+                {
+                    let adj = sw.vadjustment();
+                    adj.set_value(adj.upper());
                 }
             }
         });
@@ -1410,6 +1479,61 @@ fn walk_widgets(widget: &Option<gtk::Widget>, f: &dyn Fn(&gtk::Widget)) {
 }
 
 
+fn show_shortcuts_window(window: &adw::ApplicationWindow) {
+    let dialog = adw::AlertDialog::builder()
+        .heading("Keyboard Shortcuts")
+        .build();
+
+    let content = gtk::Box::builder()
+        .orientation(gtk::Orientation::Vertical)
+        .spacing(12)
+        .margin_start(12)
+        .margin_end(12)
+        .build();
+
+    let sections: &[(&str, &[(&str, &str)])] = &[
+        ("Wizard Navigation", &[
+            ("Alt+Right", "Next step"),
+            ("Alt+Left", "Previous step"),
+            ("Alt+1..9", "Jump to step"),
+            ("Ctrl+Enter", "Process images"),
+        ]),
+        ("File Management", &[
+            ("Ctrl+O", "Add files"),
+        ]),
+        ("Application", &[
+            ("Ctrl+,", "Settings"),
+            ("Ctrl+?  /  F1", "Keyboard shortcuts"),
+            ("Ctrl+Q", "Quit"),
+        ]),
+    ];
+
+    for (title, shortcuts) in sections {
+        let group = adw::PreferencesGroup::builder()
+            .title(*title)
+            .build();
+
+        for (accel, desc) in *shortcuts {
+            let row = adw::ActionRow::builder()
+                .title(*desc)
+                .build();
+            let label = gtk::Label::builder()
+                .label(*accel)
+                .css_classes(["monospace", "dim-label"])
+                .build();
+            row.add_suffix(&label);
+            group.add(&row);
+        }
+
+        content.append(&group);
+    }
+
+    dialog.set_extra_child(Some(&content));
+    dialog.add_response("close", "Close");
+    dialog.set_default_response(Some("close"));
+    dialog.present(Some(window));
+}
+
 fn format_bytes(bytes: u64) -> String {
     if bytes < 1024 {
         format!("{} B", bytes)

pixstrip-gtk/src/steps/step_convert.rs

@@ -33,6 +33,7 @@ pub fn build_convert_page(state: &AppState) -> adw::NavigationPage {
     // Format selection
     let format_group = adw::PreferencesGroup::builder()
         .title("Output Format")
+        .description("Choose the format all images will be converted to")
         .build();
 
     let format_row = adw::ComboRow::builder()
@@ -41,9 +42,12 @@ pub fn build_convert_page(state: &AppState) -> adw::NavigationPage {
         .build();
     let format_model = gtk::StringList::new(&[
         "Keep Original",
-        "JPEG - universal, lossy",
+        "JPEG - universal, lossy, photos",
-        "PNG - lossless, graphics",
+        "PNG - lossless, graphics, transparency",
         "WebP - modern, excellent compression",
+        "AVIF - next-gen, best compression",
+        "GIF - animations, limited colors",
+        "TIFF - archival, lossless, large files",
     ]);
     format_row.set_model(Some(&format_model));
 
@@ -53,10 +57,24 @@ pub fn build_convert_page(state: &AppState) -> adw::NavigationPage {
         Some(ImageFormat::Jpeg) => 1,
         Some(ImageFormat::Png) => 2,
         Some(ImageFormat::WebP) => 3,
-        _ => 0,
+        Some(ImageFormat::Avif) => 4,
+        Some(ImageFormat::Gif) => 5,
+        Some(ImageFormat::Tiff) => 6,
     });
 
     format_group.add(&format_row);
+
+    // Format info label
+    let info_label = gtk::Label::builder()
+        .label(format_info(cfg.convert_format))
+        .css_classes(["dim-label", "caption"])
+        .halign(gtk::Align::Start)
+        .wrap(true)
+        .margin_top(4)
+        .margin_bottom(8)
+        .margin_start(12)
+        .build();
+    format_group.add(&info_label);
     content.append(&format_group);
 
     drop(cfg);
@@ -70,14 +88,19 @@ pub fn build_convert_page(state: &AppState) -> adw::NavigationPage {
     }
     {
         let jc = state.job_config.clone();
+        let label = info_label;
         format_row.connect_selected_notify(move |row| {
             let mut c = jc.borrow_mut();
             c.convert_format = match row.selected() {
                 1 => Some(ImageFormat::Jpeg),
                 2 => Some(ImageFormat::Png),
                 3 => Some(ImageFormat::WebP),
+                4 => Some(ImageFormat::Avif),
+                5 => Some(ImageFormat::Gif),
+                6 => Some(ImageFormat::Tiff),
                 _ => None,
             };
+            label.set_label(&format_info(c.convert_format));
         });
     }
 
@@ -94,3 +117,15 @@ pub fn build_convert_page(state: &AppState) -> adw::NavigationPage {
         .child(&clamp)
         .build()
 }
+
+fn format_info(format: Option<ImageFormat>) -> String {
+    match format {
+        None => "Images will keep their original format.".into(),
+        Some(ImageFormat::Jpeg) => "JPEG: Best for photographs. Lossy compression, no transparency. Universally supported.".into(),
+        Some(ImageFormat::Png) => "PNG: Best for graphics, screenshots, logos. Lossless, supports transparency. Larger files.".into(),
+        Some(ImageFormat::WebP) => "WebP: Modern format with excellent lossy and lossless compression. Supports transparency and animation. Widely supported in browsers.".into(),
+        Some(ImageFormat::Avif) => "AVIF: Next-generation format based on AV1. Best compression ratios, supports transparency and HDR. Slower to encode, growing browser support.".into(),
+        Some(ImageFormat::Gif) => "GIF: Limited to 256 colors. Supports animation and transparency. Best for simple graphics and short animations.".into(),
+        Some(ImageFormat::Tiff) => "TIFF: Professional archival format. Lossless, supports layers and metadata. Very large files. Not suitable for web use.".into(),
+    }
+}

pixstrip-gtk/src/steps/step_resize.rs

@@ -29,9 +29,10 @@ pub fn build_resize_page(state: &AppState) -> adw::NavigationPage {
     enable_group.add(&enable_row);
     content.append(&enable_group);
 
-    // Resize mode
+    // Resize dimensions
     let mode_group = adw::PreferencesGroup::builder()
-        .title("Resize Mode")
+        .title("Dimensions")
+        .description("Set target width and height. Set height to 0 to preserve aspect ratio.")
         .build();
 
     let width_row = adw::SpinRow::builder()
@@ -53,14 +54,41 @@ pub fn build_resize_page(state: &AppState) -> adw::NavigationPage {
     // Social media presets
     let presets_group = adw::PreferencesGroup::builder()
         .title("Quick Dimension Presets")
+        .description("Click a preset to fill in the dimensions above")
         .build();
 
-    let fedi_expander = adw::ExpanderRow::builder()
+    // Helper to build preset expander sections
-        .title("Fediverse / Open Platforms")
+    let build_preset_section = |title: &str, subtitle: &str, presets: &[(&str, u32, u32)]| -> adw::ExpanderRow {
-        .subtitle("Mastodon, Pixelfed, Bluesky, Lemmy")
+        let expander = adw::ExpanderRow::builder()
+            .title(title)
+            .subtitle(subtitle)
             .build();
 
-    let fedi_presets: Vec<(&str, u32, u32)> = vec![
+        for (name, w, h) in presets {
+            let row = adw::ActionRow::builder()
+                .title(*name)
+                .subtitle(if *h == 0 { format!("{} wide", w) } else { format!("{} x {}", w, h) })
+                .activatable(true)
+                .build();
+            row.add_suffix(&gtk::Image::from_icon_name("go-next-symbolic"));
+            let width_c = width_row.clone();
+            let height_c = height_row.clone();
+            let w = *w;
+            let h = *h;
+            row.connect_activated(move |_| {
+                width_c.set_value(w as f64);
+                height_c.set_value(h as f64);
+            });
+            expander.add_row(&row);
+        }
+
+        expander
+    };
+
+    let fedi_expander = build_preset_section(
+        "Fediverse / Open Platforms",
+        "Mastodon, Pixelfed, Bluesky, Lemmy, PeerTube",
+        &[
             ("Mastodon Post", 1920, 1080),
             ("Mastodon Profile", 400, 400),
             ("Mastodon Header", 1500, 500),
@@ -69,116 +97,57 @@ pub fn build_resize_page(state: &AppState) -> adw::NavigationPage {
             ("Bluesky Post", 1200, 630),
             ("Bluesky Profile", 400, 400),
             ("Lemmy Post", 1200, 630),
-    ];
+            ("PeerTube Thumbnail", 1280, 720),
+            ("Friendica Post", 1200, 630),
+            ("Funkwhale Cover", 500, 500),
+        ],
+    );
 
-    for (name, w, h) in &fedi_presets {
+    let mainstream_expander = build_preset_section(
-        let row = adw::ActionRow::builder()
+        "Mainstream Platforms",
-            .title(*name)
+        "Instagram, YouTube, LinkedIn, Facebook, TikTok",
-            .subtitle(format!("{} x {}", w, h))
+        &[
-            .activatable(true)
-            .build();
-        row.add_suffix(&gtk::Image::from_icon_name("go-next-symbolic"));
-        let width_row_c = width_row.clone();
-        let height_row_c = height_row.clone();
-        let w = *w;
-        let h = *h;
-        row.connect_activated(move |_| {
-            width_row_c.set_value(w as f64);
-            height_row_c.set_value(h as f64);
-        });
-        fedi_expander.add_row(&row);
-    }
-
-    let mainstream_expander = adw::ExpanderRow::builder()
-        .title("Mainstream Platforms")
-        .subtitle("Instagram, YouTube, LinkedIn, Pinterest")
-        .build();
-
-    let mainstream_presets: Vec<(&str, u32, u32)> = vec![
             ("Instagram Post", 1080, 1080),
+            ("Instagram Portrait", 1080, 1350),
             ("Instagram Story/Reel", 1080, 1920),
             ("Facebook Post", 1200, 630),
+            ("Facebook Cover", 820, 312),
+            ("Facebook Profile", 170, 170),
             ("YouTube Thumbnail", 1280, 720),
+            ("YouTube Channel Art", 2560, 1440),
             ("LinkedIn Post", 1200, 627),
+            ("LinkedIn Cover", 1584, 396),
+            ("LinkedIn Profile", 400, 400),
             ("Pinterest Pin", 1000, 1500),
-    ];
+            ("TikTok Profile", 200, 200),
+            ("Threads Post", 1080, 1080),
+            ("Twitter/X Post", 1200, 675),
+            ("Twitter/X Header", 1500, 500),
+        ],
+    );
 
-    for (name, w, h) in &mainstream_presets {
+    let common_expander = build_preset_section(
-        let row = adw::ActionRow::builder()
+        "Common Sizes",
-            .title(*name)
+        "HD, 4K, Blog, Thumbnails",
-            .subtitle(format!("{} x {}", w, h))
+        &[
-            .activatable(true)
+            ("4K UHD", 3840, 2160),
-            .build();
-        row.add_suffix(&gtk::Image::from_icon_name("go-next-symbolic"));
-        let width_row_c = width_row.clone();
-        let height_row_c = height_row.clone();
-        let w = *w;
-        let h = *h;
-        row.connect_activated(move |_| {
-            width_row_c.set_value(w as f64);
-            height_row_c.set_value(h as f64);
-        });
-        mainstream_expander.add_row(&row);
-    }
-
-    let other_expander = adw::ExpanderRow::builder()
-        .title("Common Sizes")
-        .subtitle("HD, Blog, Thumbnail")
-        .build();
-
-    let other_presets: Vec<(&str, u32, u32)> = vec![
             ("Full HD", 1920, 1080),
-        ("Blog Image", 800, 0),
+            ("HD Ready", 1280, 720),
-        ("Thumbnail", 150, 150),
+            ("Blog Wide", 800, 0),
-    ];
+            ("Blog Standard", 800, 600),
-
+            ("Email Header", 600, 200),
-    for (name, w, h) in &other_presets {
+            ("Large Thumbnail", 300, 300),
-        let row = adw::ActionRow::builder()
+            ("Small Thumbnail", 150, 150),
-            .title(*name)
+            ("Favicon", 32, 32),
-            .subtitle(if *h == 0 { format!("{} wide", w) } else { format!("{} x {}", w, h) })
+        ],
-            .activatable(true)
+    );
-            .build();
-        row.add_suffix(&gtk::Image::from_icon_name("go-next-symbolic"));
-        let width_row_c = width_row.clone();
-        let height_row_c = height_row.clone();
-        let w = *w;
-        let h = *h;
-        row.connect_activated(move |_| {
-            width_row_c.set_value(w as f64);
-            height_row_c.set_value(h as f64);
-        });
-        other_expander.add_row(&row);
-    }
 
     presets_group.add(&fedi_expander);
     presets_group.add(&mainstream_expander);
-    presets_group.add(&other_expander);
+    presets_group.add(&common_expander);
     content.append(&presets_group);
 
-    // Basic adjustments
+    // Advanced options
-    let adjust_group = adw::PreferencesGroup::builder()
-        .title("Basic Adjustments")
-        .build();
-
-    let rotate_row = adw::ComboRow::builder()
-        .title("Rotate")
-        .subtitle("Rotation applied after resize")
-        .build();
-    let rotate_model = gtk::StringList::new(&["None", "90 clockwise", "180", "270 clockwise", "Auto-orient (EXIF)"]);
-    rotate_row.set_model(Some(&rotate_model));
-
-    let flip_row = adw::ComboRow::builder()
-        .title("Flip")
-        .subtitle("Mirror the image")
-        .build();
-    let flip_model = gtk::StringList::new(&["None", "Horizontal", "Vertical"]);
-    flip_row.set_model(Some(&flip_model));
-
-    adjust_group.add(&rotate_row);
-    adjust_group.add(&flip_row);
-    content.append(&adjust_group);
-
-    // Advanced
     let advanced_group = adw::PreferencesGroup::builder()
         .title("Advanced Options")
         .build();
@@ -194,7 +163,7 @@ pub fn build_resize_page(state: &AppState) -> adw::NavigationPage {
 
     drop(cfg);
 
-    // Wire signals to update JobConfig
+    // Wire signals
     {
         let jc = state.job_config.clone();
         enable_row.connect_active_notify(move |row| {