Rename .title CSS class to .page-title to avoid libadwaita collision

bread-theme's shared .title rule (1.4em bold) was a bare class selector
that also matched libadwaita's internal row/window-title labels, which
carry the same "title" class. That's what inflated breadman's settings
row titles to ~24px. Scoping the name to .page-title here (the only
consumer of the old class) and bumping bread-theme to the dev branch
where the rename lives.

src/theme.rs

@@ -10,7 +10,7 @@ use std::cell::RefCell;
 
 const APP_CSS: &str = "\
 .view-content { padding: 24px; }\n\
-.view-content > label.title { margin-bottom: 16px; }\n\
+.view-content > label.page-title { margin-bottom: 16px; }\n\
 /* [Show Keybind] chip: reads as a keycap inline with guide/keybind-viewer text. */\n\
 label.keybind-chip { \
   font-family: monospace; \
@@ -44,7 +44,7 @@ window.tour-window { background-color: transparent; }\n\
   border-radius: 12px; \
   padding: 16px 20px; \
 }\n\
-.tour-callout label.title { font-weight: bold; font-size: 15px; }\n\
+.tour-callout label.page-title { font-weight: bold; font-size: 15px; }\n\
 /* The one payoff line in the whole tour — the user did the real thing and \
    the compositor proved it — shouldn't read as the same throwaway meta \
    text as the step counter. */\n\

src/ui/ask.rs

@@ -148,7 +148,7 @@ pub fn build(store: Rc<ContentStore>, binds: Rc<Vec<Keybind>>, mode: Mode) -> Wi
             }
             Kind::Command { name, description } => {
                 let title = Label::new(Some(name));
-                title.add_css_class("title");
+                title.add_css_class("page-title");
                 title.set_xalign(0.0);
                 detail.append(&title);
 

src/ui/guide_view.rs

@@ -8,7 +8,7 @@ pub fn build(store: &ContentStore, guide: &Guide, simplified: bool, binds: &[Key
     vbox.add_css_class("view-content");
 
     let title = Label::new(Some(&guide.meta.title));
-    title.add_css_class("title");
+    title.add_css_class("page-title");
     title.set_xalign(0.0);
     vbox.append(&title);
 

src/ui/home.rs

@@ -47,7 +47,7 @@ pub fn build(
 
     let header = GBox::new(Orientation::Horizontal, 12);
     let title = Label::new(Some("Home"));
-    title.add_css_class("title");
+    title.add_css_class("page-title");
     title.set_xalign(0.0);
     title.set_hexpand(true);
     header.append(&title);

src/ui/keybind_viewer.rs

@@ -7,7 +7,7 @@ pub fn build(binds: &[Keybind]) -> gtk4::Widget {
     let vbox = GBox::new(Orientation::Vertical, 6);
 
     let header = Label::new(Some("Keybinds"));
-    header.add_css_class("title");
+    header.add_css_class("page-title");
     header.set_xalign(0.0);
     vbox.append(&header);
 

src/ui/tour/callout.rs

@@ -72,7 +72,7 @@ pub fn build(
     root.set_size_request(CALLOUT_WIDTH, -1);
 
     let title = Label::new(Some(&step.title));
-    title.add_css_class("title");
+    title.add_css_class("page-title");
     title.set_xalign(0.0);
     title.set_wrap(true);
     root.append(&title);

src/ui/troubleshoot_wizard.rs

@@ -64,7 +64,7 @@ impl Wizard {
         self.clear();
 
         let title = Label::new(Some("What's wrong?"));
-        title.add_css_class("title");
+        title.add_css_class("page-title");
         title.set_xalign(0.0);
         self.content.append(&title);