Move request tabs back to top, keep response tabs+status merged at bottom

- Center "Projects" label in sidebar headerbar via title-widget property
- Fix asymmetric request list margins (margin-start 12→6, add margin-end 6)
- Replace dim method labels with colored chips (GET/POST/PUT/PATCH/DELETE)

src/main-window.ui

@@ -43,22 +43,20 @@
             <!-- Sidebar Header Bar -->
             <child type="top">
               <object class="AdwHeaderBar">
-                <property name="show-title">False</property>
                 <property name="show-end-title-buttons">False</property>
                 <property name="show-start-title-buttons">False</property>
-                <child type="start">
+                <property name="title-widget">
-                  <object class="GtkWindowControls">
-                    <property name="side">start</property>
-                  </object>
-                </child>
-                <child type="start">
                   <object class="GtkLabel">
                     <property name="label">Projects</property>
-                    <property name="margin-start">6</property>
                     <style>
                       <class name="title"/>
                     </style>
                   </object>
+                </property>
+                <child type="start">
+                  <object class="GtkWindowControls">
+                    <property name="side">start</property>
+                  </object>
                 </child>
                 <child type="end">
                   <object class="GtkButton" id="add_project_button">

src/request_tab_widget.py

@@ -166,12 +166,10 @@ class RequestTabWidget(Gtk.Box):
         # Response Panel
         response_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL)
 
-        # Stack switcher at the top
+        # Stack switcher (placed in bottom bar together with status info)
         response_switcher = Gtk.StackSwitcher()
-        response_switcher.set_halign(Gtk.Align.CENTER)
+        response_switcher.set_halign(Gtk.Align.START)
-        response_switcher.set_margin_top(8)
+        response_switcher.set_valign(Gtk.Align.CENTER)
-        response_switcher.set_margin_bottom(8)
-        response_box.append(response_switcher)
 
         # Create a vertical paned for response stack and result panels
         self.response_main_paned = Gtk.Paned(orientation=Gtk.Orientation.VERTICAL)
@@ -358,13 +356,20 @@ class RequestTabWidget(Gtk.Box):
         # Add the main paned to response_box
         response_box.append(self.response_main_paned)
 
-        # Status Bar
+        # Bottom bar: response tabs (left) + status info (right)
-        status_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=12)
+        bottom_bar = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=0)
-        status_box.set_margin_start(12)
+        bottom_bar.set_margin_start(6)
-        status_box.set_margin_end(12)
+        bottom_bar.set_margin_end(12)
-        status_box.set_margin_top(6)
+        bottom_bar.set_margin_top(4)
-        status_box.set_margin_bottom(6)
+        bottom_bar.set_margin_bottom(4)
 
+        bottom_bar.append(response_switcher)
+
+        spacer = Gtk.Box()
+        spacer.set_hexpand(True)
+        bottom_bar.append(spacer)
+
+        status_box = Gtk.Box(orientation=Gtk.Orientation.HORIZONTAL, spacing=12)
         self.status_label = Gtk.Label(label="Ready")
         self.status_label.add_css_class("heading")
         status_box.append(self.status_label)
@@ -375,12 +380,9 @@ class RequestTabWidget(Gtk.Box):
         self.size_label = Gtk.Label(label="")
         status_box.append(self.size_label)
 
-        # Spacer
+        bottom_bar.append(status_box)
-        spacer = Gtk.Box()
-        spacer.set_hexpand(True)
-        status_box.append(spacer)
 
-        response_box.append(status_box)
+        response_box.append(bottom_bar)
 
         split_pane.set_end_child(response_box)
 

src/widgets/project-item.ui

@@ -72,7 +72,8 @@
 
         <child>
           <object class="GtkListBox" id="requests_listbox">
-            <property name="margin-start">12</property>
+            <property name="margin-start">6</property>
+            <property name="margin-end">6</property>
             <style>
               <class name="navigation-sidebar"/>
             </style>

src/widgets/request-item.ui

@@ -11,10 +11,9 @@
 
     <child>
       <object class="GtkLabel" id="method_label">
-        <property name="width-chars">6</property>
+        <property name="xalign">0.5</property>
         <style>
-          <class name="caption"/>
+          <class name="method-chip"/>
-          <class name="dim-label"/>
         </style>
       </object>
     </child>

src/widgets/request_item.py

@@ -20,6 +20,14 @@
 
 from gi.repository import Gtk, GObject
 
+_METHOD_CSS = {
+    'GET':    'accent',
+    'POST':   'success',
+    'PUT':    'warning',
+    'PATCH':  'warning',
+    'DELETE': 'error',
+}
+
 
 @Gtk.Template(resource_path='/cz/bugsy/roster/widgets/request-item.ui')
 class RequestItem(Gtk.Box):
@@ -38,7 +46,9 @@ class RequestItem(Gtk.Box):
     def __init__(self, saved_request):
         super().__init__()
         self.saved_request = saved_request
-        self.method_label.set_text(saved_request.request.method)
+        method = saved_request.request.method
+        self.method_label.set_text(method)
+        self.method_label.add_css_class(_METHOD_CSS.get(method, 'dim-label'))
         self.name_label.set_text(saved_request.name)
 
         # Add click gesture for loading

src/window.py

@@ -203,6 +203,18 @@ class RosterWindow(Adw.ApplicationWindow):
                 color: @accent_color;
                 font-weight: 600;
             }
+
+            /* Method chips in sidebar request list */
+            .method-chip {
+                border-radius: 4px;
+                padding: 1px 5px;
+                font-size: 0.72em;
+                font-weight: 700;
+            }
+            .method-chip.accent  { background-color: alpha(@accent_bg_color,  0.18); }
+            .method-chip.success { background-color: alpha(@success_bg_color, 0.18); }
+            .method-chip.warning { background-color: alpha(@warning_bg_color, 0.18); }
+            .method-chip.error   { background-color: alpha(@error_bg_color,   0.18); }
         """)
 
         Gtk.StyleContext.add_provider_for_display(