Add log view UI with transaction entry form

Expense/Income toggle, amount entry, currency dropdown, category
dropdown (filtered by transaction type), date picker with calendar
popover, optional note field, save button, and recent transactions
placeholder section.

outlay-gtk/src/log_view.rs

@@ -0,0 +1,204 @@
+use adw::prelude::*;
+use gtk::glib;
+
+pub struct LogView {
+    pub container: gtk::Box,
+    pub type_toggle: gtk::ToggleButton,
+    pub amount_row: adw::EntryRow,
+    pub currency_row: adw::ComboRow,
+    pub category_row: adw::ComboRow,
+    pub date_label: gtk::Label,
+    pub note_row: adw::EntryRow,
+    pub save_button: gtk::Button,
+    pub recent_group: adw::PreferencesGroup,
+}
+
+impl LogView {
+    pub fn new() -> Self {
+        let container = gtk::Box::new(gtk::Orientation::Vertical, 0);
+
+        let clamp = adw::Clamp::new();
+        clamp.set_maximum_size(600);
+        clamp.set_margin_top(24);
+        clamp.set_margin_bottom(24);
+        clamp.set_margin_start(12);
+        clamp.set_margin_end(12);
+
+        let inner = gtk::Box::new(gtk::Orientation::Vertical, 24);
+
+        // -- Transaction type toggle --
+        let type_box = gtk::Box::new(gtk::Orientation::Horizontal, 0);
+        type_box.add_css_class("linked");
+        type_box.set_halign(gtk::Align::Center);
+
+        let expense_btn = gtk::ToggleButton::with_label("Expense");
+        expense_btn.set_active(true);
+        expense_btn.set_hexpand(true);
+
+        let income_btn = gtk::ToggleButton::with_label("Income");
+        income_btn.set_group(Some(&expense_btn));
+        income_btn.set_hexpand(true);
+
+        type_box.append(&expense_btn);
+        type_box.append(&income_btn);
+
+        // -- Form group --
+        let form_group = adw::PreferencesGroup::builder()
+            .title("New Transaction")
+            .build();
+
+        // Amount
+        let amount_row = adw::EntryRow::builder()
+            .title("Amount")
+            .build();
+        amount_row.set_input_purpose(gtk::InputPurpose::Number);
+        form_group.add(&amount_row);
+
+        // Currency
+        let currency_model = gtk::StringList::new(&[
+            "USD", "EUR", "GBP", "JPY", "CAD", "AUD", "CHF", "CNY", "INR", "BRL",
+        ]);
+        let currency_row = adw::ComboRow::builder()
+            .title("Currency")
+            .model(&currency_model)
+            .build();
+        form_group.add(&currency_row);
+
+        // Category
+        let category_model = gtk::StringList::new(&[]);
+        let category_row = adw::ComboRow::builder()
+            .title("Category")
+            .model(&category_model)
+            .build();
+
+        // Populate with default expense categories
+        Self::populate_categories(&category_model, true);
+
+        form_group.add(&category_row);
+
+        // Date picker
+        let today = glib::DateTime::now_local().unwrap();
+        let date_str = today.format("%Y-%m-%d").unwrap().to_string();
+
+        let date_label = gtk::Label::new(Some(&date_str));
+        date_label.set_halign(gtk::Align::End);
+        date_label.set_hexpand(true);
+
+        let calendar = gtk::Calendar::new();
+        let popover = gtk::Popover::new();
+        popover.set_child(Some(&calendar));
+
+        let date_menu_btn = gtk::MenuButton::new();
+        date_menu_btn.set_popover(Some(&popover));
+        date_menu_btn.set_icon_name("x-office-calendar-symbolic");
+        date_menu_btn.add_css_class("flat");
+
+        let date_box = gtk::Box::new(gtk::Orientation::Horizontal, 8);
+        date_box.append(&date_label);
+        date_box.append(&date_menu_btn);
+
+        let date_row = adw::ActionRow::builder()
+            .title("Date")
+            .build();
+        date_row.add_suffix(&date_box);
+        date_row.set_activatable_widget(Some(&date_menu_btn));
+
+        // Connect calendar day-selected to update the label
+        let date_label_ref = date_label.clone();
+        let popover_ref = popover.clone();
+        calendar.connect_day_selected(move |cal| {
+            let dt = cal.date();
+            let formatted = dt.format("%Y-%m-%d").unwrap().to_string();
+            date_label_ref.set_label(&formatted);
+            popover_ref.popdown();
+        });
+
+        form_group.add(&date_row);
+
+        // Note
+        let note_row = adw::EntryRow::builder()
+            .title("Note (optional)")
+            .build();
+        form_group.add(&note_row);
+
+        // -- Save button --
+        let save_button = gtk::Button::with_label("Save");
+        save_button.add_css_class("suggested-action");
+        save_button.add_css_class("pill");
+        save_button.set_halign(gtk::Align::Center);
+        save_button.set_margin_top(8);
+
+        // -- Wire type toggle to filter categories --
+        let category_model_ref = category_model.clone();
+        expense_btn.connect_toggled(move |btn| {
+            if btn.is_active() {
+                Self::populate_categories(&category_model_ref, true);
+            }
+        });
+        let category_model_ref2 = category_model.clone();
+        income_btn.connect_toggled(move |btn| {
+            if btn.is_active() {
+                Self::populate_categories(&category_model_ref2, false);
+            }
+        });
+
+        // -- Recent transactions (placeholder) --
+        let recent_group = adw::PreferencesGroup::builder()
+            .title("Recent")
+            .build();
+
+        let placeholder = adw::ActionRow::builder()
+            .title("No transactions yet")
+            .build();
+        placeholder.add_css_class("dim-label");
+        recent_group.add(&placeholder);
+
+        // -- Assemble --
+        inner.append(&type_box);
+        inner.append(&form_group);
+        inner.append(&save_button);
+        inner.append(&recent_group);
+
+        clamp.set_child(Some(&inner));
+        container.append(&clamp);
+
+        LogView {
+            container,
+            type_toggle: expense_btn,
+            amount_row,
+            currency_row,
+            category_row,
+            date_label,
+            note_row,
+            save_button,
+            recent_group,
+        }
+    }
+
+    fn populate_categories(model: &gtk::StringList, is_expense: bool) {
+        // Remove existing items
+        while model.n_items() > 0 {
+            model.remove(0);
+        }
+
+        if is_expense {
+            let cats = [
+                "Food & Dining", "Groceries", "Transport", "Housing",
+                "Utilities", "Healthcare", "Entertainment", "Shopping",
+                "Education", "Personal Care", "Travel", "Insurance",
+                "Gifts & Donations", "Other Expense",
+            ];
+            for c in cats {
+                model.append(c);
+            }
+        } else {
+            let cats = [
+                "Salary", "Freelance", "Investments", "Gifts Received",
+                "Refunds", "Other Income",
+            ];
+            for c in cats {
+                model.append(c);
+            }
+        }
+    }
+}