Add left sidebar for managing saved requests in projects

Implement a 3-column layout with a collapsible sidebar for organizing
and managing HTTP requests within projects. Requests are stored in
~/.roster/requests.json for easy git versioning.

Features:
- Create, rename, and delete projects
- Save current request to a project with custom name
- Load saved requests with direct click (no confirmation dialog)
- Delete saved requests with confirmation
- Expandable/collapsible project folders
- Context menu for project actions

Technical changes:
- Add SavedRequest and Project data models with JSON serialization
- Implement ProjectManager for persistence to ~/.roster/requests.json
- Create RequestItem and ProjectItem widgets with GTK templates
- Restructure main window UI to nested GtkPaned (3-column layout)
- Add project management dialogs using AdwAlertDialog
- Update build system with new source files and UI resources

src/main-window.ui

@@ -72,58 +72,36 @@
               </object>
             </child>
 
-            <!-- Split View: Request (left) | Response (right) -->
+            <!-- 3-Column Layout: Sidebar | Request | Response -->
             <child>
-              <object class="GtkPaned" id="split_pane">
+              <object class="GtkPaned" id="main_pane">
                 <property name="vexpand">True</property>
                 <property name="orientation">horizontal</property>
-                <property name="position">600</property>
+                <property name="position">250</property>
                 <property name="shrink-start-child">False</property>
-                <property name="shrink-end-child">False</property>
                 <property name="resize-start-child">True</property>
-                <property name="resize-end-child">True</property>
 
-                <!-- LEFT: Request Configuration -->
+                <!-- START: Sidebar for Projects -->
                 <property name="start-child">
                   <object class="GtkBox">
                     <property name="orientation">vertical</property>
+                    <property name="width-request">200</property>
 
-                    <!-- Request Tabs Placeholder -->
-                    <child>
-                      <object class="GtkBox" id="request_tabs_container">
-                        <property name="orientation">vertical</property>
-                        <property name="vexpand">True</property>
-                      </object>
-                    </child>
-                  </object>
-                </property>
-
-                <!-- RIGHT: Response Display -->
-                <property name="end-child">
-                  <object class="GtkBox">
-                    <property name="orientation">vertical</property>
-
-                    <!-- Response Tabs Placeholder -->
-                    <child>
-                      <object class="GtkBox" id="response_tabs_container">
-                        <property name="orientation">vertical</property>
-                        <property name="vexpand">True</property>
-                      </object>
-                    </child>
-
-                    <!-- Status Bar -->
+                    <!-- Sidebar Header -->
                     <child>
                       <object class="GtkBox">
                         <property name="orientation">horizontal</property>
-                        <property name="spacing">12</property>
+                        <property name="spacing">6</property>
                         <property name="margin-start">12</property>
                         <property name="margin-end">12</property>
                         <property name="margin-top">6</property>
                         <property name="margin-bottom">6</property>
 
                         <child>
-                          <object class="GtkLabel" id="status_label">
-                            <property name="label">Ready</property>
+                          <object class="GtkLabel">
+                            <property name="label">Projects</property>
+                            <property name="xalign">0</property>
+                            <property name="hexpand">True</property>
                             <style>
                               <class name="heading"/>
                             </style>
@@ -131,28 +109,130 @@
                         </child>
 
                         <child>
-                          <object class="GtkLabel" id="time_label">
-                            <property name="label"></property>
-                          </object>
-                        </child>
-
-                        <!-- Spacer -->
-                        <child>
-                          <object class="GtkBox">
-                            <property name="hexpand">True</property>
-                          </object>
-                        </child>
-
-                        <!-- History Toggle Button -->
-                        <child>
-                          <object class="GtkToggleButton" id="history_toggle_button">
-                            <property name="icon-name">view-list-symbolic</property>
-                            <property name="tooltip-text">Toggle History Panel</property>
-                            <signal name="toggled" handler="on_history_toggle_button_toggled"/>
+                          <object class="GtkButton" id="add_project_button">
+                            <property name="icon-name">list-add-symbolic</property>
+                            <property name="tooltip-text">Add Project</property>
+                            <signal name="clicked" handler="on_add_project_clicked"/>
+                            <style>
+                              <class name="flat"/>
+                            </style>
                           </object>
                         </child>
                       </object>
                     </child>
+
+                    <!-- Projects List -->
+                    <child>
+                      <object class="GtkScrolledWindow">
+                        <property name="vexpand">True</property>
+                        <child>
+                          <object class="GtkListBox" id="projects_listbox">
+                            <style>
+                              <class name="navigation-sidebar"/>
+                            </style>
+                          </object>
+                        </child>
+                      </object>
+                    </child>
+
+                    <!-- Save Current Request Button -->
+                    <child>
+                      <object class="GtkButton" id="save_request_button">
+                        <property name="label">Save Current Request</property>
+                        <property name="margin-start">12</property>
+                        <property name="margin-end">12</property>
+                        <property name="margin-bottom">12</property>
+                        <signal name="clicked" handler="on_save_request_clicked"/>
+                        <style>
+                          <class name="suggested-action"/>
+                        </style>
+                      </object>
+                    </child>
+                  </object>
+                </property>
+
+                <!-- END: Request/Response Split -->
+                <property name="end-child">
+                  <object class="GtkPaned" id="split_pane">
+                    <property name="orientation">horizontal</property>
+                    <property name="position">600</property>
+                    <property name="shrink-start-child">False</property>
+                    <property name="shrink-end-child">False</property>
+                    <property name="resize-start-child">True</property>
+                    <property name="resize-end-child">True</property>
+
+                    <!-- LEFT: Request Configuration -->
+                    <property name="start-child">
+                      <object class="GtkBox">
+                        <property name="orientation">vertical</property>
+
+                        <!-- Request Tabs Placeholder -->
+                        <child>
+                          <object class="GtkBox" id="request_tabs_container">
+                            <property name="orientation">vertical</property>
+                            <property name="vexpand">True</property>
+                          </object>
+                        </child>
+                      </object>
+                    </property>
+
+                    <!-- RIGHT: Response Display -->
+                    <property name="end-child">
+                      <object class="GtkBox">
+                        <property name="orientation">vertical</property>
+
+                        <!-- Response Tabs Placeholder -->
+                        <child>
+                          <object class="GtkBox" id="response_tabs_container">
+                            <property name="orientation">vertical</property>
+                            <property name="vexpand">True</property>
+                          </object>
+                        </child>
+
+                        <!-- Status Bar -->
+                        <child>
+                          <object class="GtkBox">
+                            <property name="orientation">horizontal</property>
+                            <property name="spacing">12</property>
+                            <property name="margin-start">12</property>
+                            <property name="margin-end">12</property>
+                            <property name="margin-top">6</property>
+                            <property name="margin-bottom">6</property>
+
+                            <child>
+                              <object class="GtkLabel" id="status_label">
+                                <property name="label">Ready</property>
+                                <style>
+                                  <class name="heading"/>
+                                </style>
+                              </object>
+                            </child>
+
+                            <child>
+                              <object class="GtkLabel" id="time_label">
+                                <property name="label"></property>
+                              </object>
+                            </child>
+
+                            <!-- Spacer -->
+                            <child>
+                              <object class="GtkBox">
+                                <property name="hexpand">True</property>
+                              </object>
+                            </child>
+
+                            <!-- History Toggle Button -->
+                            <child>
+                              <object class="GtkToggleButton" id="history_toggle_button">
+                                <property name="icon-name">view-list-symbolic</property>
+                                <property name="tooltip-text">Toggle History Panel</property>
+                                <signal name="toggled" handler="on_history_toggle_button_toggled"/>
+                              </object>
+                            </child>
+                          </object>
+                        </child>
+                      </object>
+                    </property>
                   </object>
                 </property>
               </object>

src/meson.build

@@ -33,6 +33,7 @@ roster_sources = [
   'models.py',
   'http_client.py',
   'history_manager.py',
+  'project_manager.py',
 ]
 
 install_data(roster_sources, install_dir: moduledir)
@@ -42,6 +43,8 @@ widgets_sources = [
   'widgets/__init__.py',
   'widgets/header_row.py',
   'widgets/history_item.py',
+  'widgets/project_item.py',
+  'widgets/request_item.py',
 ]
 
 install_data(widgets_sources, install_dir: moduledir / 'widgets')

src/models.py

@@ -18,7 +18,7 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 
 from dataclasses import dataclass, asdict
-from typing import Dict, Optional
+from typing import Dict, Optional, List
 
 
 @dataclass
@@ -84,3 +84,62 @@ class HistoryEntry:
             response=HttpResponse.from_dict(data['response']) if data.get('response') else None,
             error=data.get('error')
         )
+
+
+@dataclass
+class SavedRequest:
+    """A saved HTTP request with metadata."""
+    id: str  # UUID
+    name: str  # User-provided name
+    request: HttpRequest
+    created_at: str  # ISO format
+    modified_at: str  # ISO format
+
+    def to_dict(self):
+        """Convert to dictionary for JSON serialization."""
+        return {
+            'id': self.id,
+            'name': self.name,
+            'request': self.request.to_dict(),
+            'created_at': self.created_at,
+            'modified_at': self.modified_at
+        }
+
+    @classmethod
+    def from_dict(cls, data):
+        """Create instance from dictionary."""
+        return cls(
+            id=data['id'],
+            name=data['name'],
+            request=HttpRequest.from_dict(data['request']),
+            created_at=data['created_at'],
+            modified_at=data['modified_at']
+        )
+
+
+@dataclass
+class Project:
+    """A project containing saved requests."""
+    id: str  # UUID
+    name: str
+    requests: List[SavedRequest]
+    created_at: str  # ISO format
+
+    def to_dict(self):
+        """Convert to dictionary for JSON serialization."""
+        return {
+            'id': self.id,
+            'name': self.name,
+            'requests': [req.to_dict() for req in self.requests],
+            'created_at': self.created_at
+        }
+
+    @classmethod
+    def from_dict(cls, data):
+        """Create instance from dictionary."""
+        return cls(
+            id=data['id'],
+            name=data['name'],
+            requests=[SavedRequest.from_dict(r) for r in data.get('requests', [])],
+            created_at=data['created_at']
+        )

src/project_manager.py

@@ -0,0 +1,119 @@
+# project_manager.py
+#
+# Copyright 2025 Pavel Baksy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import json
+import uuid
+from pathlib import Path
+from typing import List
+from datetime import datetime, timezone
+from .models import Project, SavedRequest, HttpRequest
+
+
+class ProjectManager:
+    """Manages project and saved request persistence."""
+
+    def __init__(self):
+        # Store in ~/.roster/ (not ~/.config/) for git versioning
+        self.data_dir = Path.home() / '.roster'
+        self.projects_file = self.data_dir / 'requests.json'
+        self._ensure_data_dir()
+
+    def _ensure_data_dir(self):
+        """Create data directory if it doesn't exist."""
+        self.data_dir.mkdir(parents=True, exist_ok=True)
+
+    def load_projects(self) -> List[Project]:
+        """Load projects from JSON file."""
+        if not self.projects_file.exists():
+            return []
+
+        try:
+            with open(self.projects_file, 'r') as f:
+                data = json.load(f)
+            return [Project.from_dict(p) for p in data.get('projects', [])]
+        except Exception as e:
+            print(f"Error loading projects: {e}")
+            return []
+
+    def save_projects(self, projects: List[Project]):
+        """Save projects to JSON file."""
+        try:
+            data = {
+                'version': 1,
+                'projects': [p.to_dict() for p in projects]
+            }
+            with open(self.projects_file, 'w') as f:
+                json.dump(data, f, indent=2)
+        except Exception as e:
+            print(f"Error saving projects: {e}")
+
+    def add_project(self, name: str) -> Project:
+        """Create new project."""
+        projects = self.load_projects()
+        project = Project(
+            id=str(uuid.uuid4()),
+            name=name,
+            requests=[],
+            created_at=datetime.now(timezone.utc).isoformat()
+        )
+        projects.append(project)
+        self.save_projects(projects)
+        return project
+
+    def rename_project(self, project_id: str, new_name: str):
+        """Rename a project."""
+        projects = self.load_projects()
+        for p in projects:
+            if p.id == project_id:
+                p.name = new_name
+                break
+        self.save_projects(projects)
+
+    def delete_project(self, project_id: str):
+        """Delete a project and all its requests."""
+        projects = self.load_projects()
+        projects = [p for p in projects if p.id != project_id]
+        self.save_projects(projects)
+
+    def add_request(self, project_id: str, name: str, request: HttpRequest) -> SavedRequest:
+        """Add request to a project."""
+        projects = self.load_projects()
+        now = datetime.now(timezone.utc).isoformat()
+        saved_request = SavedRequest(
+            id=str(uuid.uuid4()),
+            name=name,
+            request=request,
+            created_at=now,
+            modified_at=now
+        )
+        for p in projects:
+            if p.id == project_id:
+                p.requests.append(saved_request)
+                break
+        self.save_projects(projects)
+        return saved_request
+
+    def delete_request(self, project_id: str, request_id: str):
+        """Delete a saved request."""
+        projects = self.load_projects()
+        for p in projects:
+            if p.id == project_id:
+                p.requests = [r for r in p.requests if r.id != request_id]
+                break
+        self.save_projects(projects)

src/roster.gresource.xml

@@ -5,5 +5,7 @@
     <file preprocess="xml-stripblanks">shortcuts-dialog.ui</file>
     <file preprocess="xml-stripblanks">widgets/header-row.ui</file>
     <file preprocess="xml-stripblanks">widgets/history-item.ui</file>
+    <file preprocess="xml-stripblanks">widgets/project-item.ui</file>
+    <file preprocess="xml-stripblanks">widgets/request-item.ui</file>
   </gresource>
 </gresources>

src/widgets/__init__.py

@@ -19,5 +19,7 @@
 
 from .header_row import HeaderRow
 from .history_item import HistoryItem
+from .project_item import ProjectItem
+from .request_item import RequestItem
 
-__all__ = ['HeaderRow', 'HistoryItem']
+__all__ = ['HeaderRow', 'HistoryItem', 'ProjectItem', 'RequestItem']

src/widgets/project-item.ui

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="libadwaita" version="1.0"/>
+
+  <menu id="project_menu">
+    <section>
+      <item>
+        <attribute name="label">Add Request</attribute>
+        <attribute name="action">project.add-request</attribute>
+      </item>
+      <item>
+        <attribute name="label">Rename</attribute>
+        <attribute name="action">project.rename</attribute>
+      </item>
+      <item>
+        <attribute name="label">Delete</attribute>
+        <attribute name="action">project.delete</attribute>
+      </item>
+    </section>
+  </menu>
+
+  <template class="ProjectItem" parent="GtkBox">
+    <property name="orientation">vertical</property>
+    <property name="spacing">0</property>
+
+    <child>
+      <object class="GtkBox">
+        <property name="orientation">horizontal</property>
+        <property name="spacing">6</property>
+        <property name="margin-start">6</property>
+        <property name="margin-end">6</property>
+        <property name="margin-top">6</property>
+        <property name="margin-bottom">6</property>
+
+        <child>
+          <object class="GtkImage" id="expand_icon">
+            <property name="icon-name">go-next-symbolic</property>
+          </object>
+        </child>
+
+        <child>
+          <object class="GtkLabel" id="name_label">
+            <property name="xalign">0</property>
+            <property name="hexpand">True</property>
+            <style>
+              <class name="heading"/>
+            </style>
+          </object>
+        </child>
+
+        <child>
+          <object class="GtkMenuButton">
+            <property name="icon-name">view-more-symbolic</property>
+            <property name="menu-model">project_menu</property>
+            <style>
+              <class name="flat"/>
+            </style>
+          </object>
+        </child>
+      </object>
+    </child>
+
+    <child>
+      <object class="GtkRevealer" id="requests_revealer">
+        <property name="reveal-child">False</property>
+        <property name="transition-type">slide-down</property>
+
+        <child>
+          <object class="GtkListBox" id="requests_listbox">
+            <property name="margin-start">24</property>
+            <style>
+              <class name="navigation-sidebar"/>
+            </style>
+          </object>
+        </child>
+      </object>
+    </child>
+  </template>
+</interface>

src/widgets/project_item.py

@@ -0,0 +1,98 @@
+# project_item.py
+#
+# Copyright 2025 Pavel Baksy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from gi.repository import Gtk, GObject, Gio
+from .request_item import RequestItem
+
+
+@Gtk.Template(resource_path='/cz/vesp/roster/widgets/project-item.ui')
+class ProjectItem(Gtk.Box):
+    """Widget for displaying a project with its requests."""
+
+    __gtype_name__ = 'ProjectItem'
+
+    expand_icon = Gtk.Template.Child()
+    name_label = Gtk.Template.Child()
+    requests_revealer = Gtk.Template.Child()
+    requests_listbox = Gtk.Template.Child()
+
+    __gsignals__ = {
+        'rename-requested': (GObject.SIGNAL_RUN_FIRST, None, ()),
+        'delete-requested': (GObject.SIGNAL_RUN_FIRST, None, ()),
+        'add-request-requested': (GObject.SIGNAL_RUN_FIRST, None, ()),
+        'request-load-requested': (GObject.SIGNAL_RUN_FIRST, None, (object,)),
+        'request-delete-requested': (GObject.SIGNAL_RUN_FIRST, None, (object,)),
+    }
+
+    def __init__(self, project):
+        super().__init__()
+        self.project = project
+        self.expanded = False
+        self._setup_actions()
+        self._populate()
+
+        # Click gesture for header
+        gesture = Gtk.GestureClick.new()
+        gesture.connect('released', self._on_header_clicked)
+        self.add_controller(gesture)
+
+    def _setup_actions(self):
+        """Setup action group for menu."""
+        actions = Gio.SimpleActionGroup.new()
+
+        action = Gio.SimpleAction.new("add-request", None)
+        action.connect("activate", lambda *_: self.emit('add-request-requested'))
+        actions.add_action(action)
+
+        action = Gio.SimpleAction.new("rename", None)
+        action.connect("activate", lambda *_: self.emit('rename-requested'))
+        actions.add_action(action)
+
+        action = Gio.SimpleAction.new("delete", None)
+        action.connect("activate", lambda *_: self.emit('delete-requested'))
+        actions.add_action(action)
+
+        self.insert_action_group("project", actions)
+
+    def _populate(self):
+        """Populate with project data."""
+        self.name_label.set_text(self.project.name)
+
+        # Clear and add requests
+        while child := self.requests_listbox.get_first_child():
+            self.requests_listbox.remove(child)
+
+        for saved_request in self.project.requests:
+            item = RequestItem(saved_request)
+            item.connect('load-requested',
+                        lambda w, sr=saved_request: self.emit('request-load-requested', sr))
+            item.connect('delete-requested',
+                        lambda w, sr=saved_request: self.emit('request-delete-requested', sr))
+            self.requests_listbox.append(item)
+
+    def _on_header_clicked(self, gesture, n_press, x, y):
+        """Toggle expansion."""
+        self.expanded = not self.expanded
+        self.requests_revealer.set_reveal_child(self.expanded)
+        icon_name = "go-down-symbolic" if self.expanded else "go-next-symbolic"
+        self.expand_icon.set_from_icon_name(icon_name)
+
+    def refresh(self):
+        """Refresh from project data."""
+        self._populate()

src/widgets/request-item.ui

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <template class="RequestItem" parent="GtkBox">
+    <property name="orientation">horizontal</property>
+    <property name="spacing">6</property>
+    <property name="margin-start">6</property>
+    <property name="margin-end">6</property>
+    <property name="margin-top">3</property>
+    <property name="margin-bottom">3</property>
+
+    <child>
+      <object class="GtkLabel" id="method_label">
+        <property name="width-chars">6</property>
+        <style>
+          <class name="caption"/>
+          <class name="dim-label"/>
+        </style>
+      </object>
+    </child>
+
+    <child>
+      <object class="GtkLabel" id="name_label">
+        <property name="xalign">0</property>
+        <property name="ellipsize">end</property>
+        <property name="hexpand">True</property>
+      </object>
+    </child>
+
+    <child>
+      <object class="GtkButton" id="delete_button">
+        <property name="icon-name">edit-delete-symbolic</property>
+        <property name="tooltip-text">Delete request</property>
+        <signal name="clicked" handler="on_delete_clicked"/>
+        <style>
+          <class name="flat"/>
+        </style>
+      </object>
+    </child>
+  </template>
+</interface>

src/widgets/request_item.py

@@ -0,0 +1,55 @@
+# request_item.py
+#
+# Copyright 2025 Pavel Baksy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from gi.repository import Gtk, GObject
+
+
+@Gtk.Template(resource_path='/cz/vesp/roster/widgets/request-item.ui')
+class RequestItem(Gtk.Box):
+    """Widget for displaying a saved request."""
+
+    __gtype_name__ = 'RequestItem'
+
+    method_label = Gtk.Template.Child()
+    name_label = Gtk.Template.Child()
+
+    __gsignals__ = {
+        'load-requested': (GObject.SIGNAL_RUN_FIRST, None, ()),
+        'delete-requested': (GObject.SIGNAL_RUN_FIRST, None, ()),
+    }
+
+    def __init__(self, saved_request):
+        super().__init__()
+        self.saved_request = saved_request
+        self.method_label.set_text(saved_request.request.method)
+        self.name_label.set_text(saved_request.name)
+
+        # Add click gesture for loading
+        gesture = Gtk.GestureClick.new()
+        gesture.connect('released', self._on_clicked)
+        self.add_controller(gesture)
+
+    def _on_clicked(self, gesture, n_press, x, y):
+        """Handle click to load request."""
+        self.emit('load-requested')
+
+    @Gtk.Template.Callback()
+    def on_delete_clicked(self, button):
+        """Handle delete button click."""
+        self.emit('delete-requested')

src/window.py

@@ -21,8 +21,10 @@ from gi.repository import Adw, Gtk, GLib, Gio
 from .models import HttpRequest, HttpResponse, HistoryEntry
 from .http_client import HttpClient
 from .history_manager import HistoryManager
+from .project_manager import ProjectManager
 from .widgets.header_row import HeaderRow
 from .widgets.history_item import HistoryItem
+from .widgets.project_item import ProjectItem
 from datetime import datetime
 import threading
 
@@ -36,9 +38,15 @@ class RosterWindow(Adw.ApplicationWindow):
     url_entry = Gtk.Template.Child()
     send_button = Gtk.Template.Child()
 
-    # Split pane
+    # Panes
+    main_pane = Gtk.Template.Child()
     split_pane = Gtk.Template.Child()
 
+    # Sidebar widgets
+    projects_listbox = Gtk.Template.Child()
+    add_project_button = Gtk.Template.Child()
+    save_request_button = Gtk.Template.Child()
+
     # Containers for tabs
     request_tabs_container = Gtk.Template.Child()
     response_tabs_container = Gtk.Template.Child()
@@ -58,6 +66,7 @@ class RosterWindow(Adw.ApplicationWindow):
 
         self.http_client = HttpClient()
         self.history_manager = HistoryManager()
+        self.project_manager = ProjectManager()
 
         # Create window actions
         self._create_actions()
@@ -67,6 +76,7 @@ class RosterWindow(Adw.ApplicationWindow):
         self._setup_request_tabs()
         self._setup_response_tabs()
         self._load_history()
+        self._load_projects()
 
         # Add initial header row
         self._add_header_row()
@@ -434,3 +444,226 @@ class RosterWindow(Adw.ApplicationWindow):
         # Get the toast overlay (we need to add one)
         # For now, just print to console
         print(f"Toast: {message}")
+
+    # Project Management Methods
+
+    def _load_projects(self):
+        """Load and display projects."""
+        # Clear existing
+        while child := self.projects_listbox.get_first_child():
+            self.projects_listbox.remove(child)
+
+        # Load and populate
+        projects = self.project_manager.load_projects()
+        for project in projects:
+            item = ProjectItem(project)
+            item.connect('rename-requested', self._on_project_rename, project)
+            item.connect('delete-requested', self._on_project_delete, project)
+            item.connect('add-request-requested', self._on_add_to_project, project)
+            item.connect('request-load-requested', self._on_load_request)
+            item.connect('request-delete-requested', self._on_delete_request, project)
+            self.projects_listbox.append(item)
+
+    @Gtk.Template.Callback()
+    def on_add_project_clicked(self, button):
+        """Show dialog to create project."""
+        dialog = Adw.AlertDialog()
+        dialog.set_heading("New Project")
+        dialog.set_body("Enter a name for the new project:")
+
+        entry = Gtk.Entry()
+        entry.set_placeholder_text("Project name")
+        dialog.set_extra_child(entry)
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("create", "Create")
+        dialog.set_response_appearance("create", Adw.ResponseAppearance.SUGGESTED)
+        dialog.set_default_response("create")
+        dialog.set_close_response("cancel")
+
+        def on_response(dlg, response):
+            if response == "create":
+                name = entry.get_text().strip()
+                if name:
+                    self.project_manager.add_project(name)
+                    self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)
+
+    def _on_project_rename(self, widget, project):
+        """Show rename dialog."""
+        dialog = Adw.AlertDialog()
+        dialog.set_heading("Rename Project")
+        dialog.set_body(f"Rename '{project.name}' to:")
+
+        entry = Gtk.Entry()
+        entry.set_text(project.name)
+        dialog.set_extra_child(entry)
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("rename", "Rename")
+        dialog.set_response_appearance("rename", Adw.ResponseAppearance.SUGGESTED)
+
+        def on_response(dlg, response):
+            if response == "rename":
+                new_name = entry.get_text().strip()
+                if new_name:
+                    self.project_manager.rename_project(project.id, new_name)
+                    self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)
+
+    def _on_project_delete(self, widget, project):
+        """Show delete confirmation."""
+        dialog = Adw.AlertDialog()
+        dialog.set_heading("Delete Project?")
+        dialog.set_body(f"Delete '{project.name}' and all its saved requests? This cannot be undone.")
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("delete", "Delete")
+        dialog.set_response_appearance("delete", Adw.ResponseAppearance.DESTRUCTIVE)
+        dialog.set_close_response("cancel")
+
+        def on_response(dlg, response):
+            if response == "delete":
+                self.project_manager.delete_project(project.id)
+                self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)
+
+    @Gtk.Template.Callback()
+    def on_save_request_clicked(self, button):
+        """Save current request to a project."""
+        request = self._build_request_from_ui()
+
+        if not request.url.strip():
+            self._show_toast("Cannot save: URL is empty")
+            return
+
+        projects = self.project_manager.load_projects()
+        if not projects:
+            # Show error - no projects
+            dialog = Adw.AlertDialog()
+            dialog.set_heading("No Projects")
+            dialog.set_body("Create a project first before saving requests.")
+            dialog.add_response("ok", "OK")
+            dialog.present(self)
+            return
+
+        # Create save dialog
+        dialog = Adw.AlertDialog()
+        dialog.set_heading("Save Request")
+        dialog.set_body("Choose a project and enter a name:")
+
+        box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=12)
+
+        # Project dropdown
+        project_list = Gtk.StringList()
+        for p in projects:
+            project_list.append(p.name)
+        dropdown = Gtk.DropDown(model=project_list)
+        box.append(dropdown)
+
+        # Name entry
+        entry = Gtk.Entry()
+        entry.set_placeholder_text("Request name")
+        box.append(entry)
+
+        dialog.set_extra_child(box)
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("save", "Save")
+        dialog.set_response_appearance("save", Adw.ResponseAppearance.SUGGESTED)
+
+        def on_response(dlg, response):
+            if response == "save":
+                name = entry.get_text().strip()
+                if name:
+                    selected = dropdown.get_selected()
+                    project = projects[selected]
+                    self.project_manager.add_request(project.id, name, request)
+                    self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)
+
+    def _on_add_to_project(self, widget, project):
+        """Save current request to specific project."""
+        request = self._build_request_from_ui()
+
+        if not request.url.strip():
+            self._show_toast("Cannot save: URL is empty")
+            return
+
+        dialog = Adw.AlertDialog()
+        dialog.set_heading(f"Save to {project.name}")
+        dialog.set_body("Enter a name for this request:")
+
+        entry = Gtk.Entry()
+        entry.set_placeholder_text("Request name")
+        dialog.set_extra_child(entry)
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("save", "Save")
+        dialog.set_response_appearance("save", Adw.ResponseAppearance.SUGGESTED)
+
+        def on_response(dlg, response):
+            if response == "save":
+                name = entry.get_text().strip()
+                if name:
+                    self.project_manager.add_request(project.id, name, request)
+                    self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)
+
+    def _on_load_request(self, widget, saved_request):
+        """Load saved request into UI (direct load, no warning)."""
+        req = saved_request.request
+
+        # Set method
+        methods = ["GET", "POST", "PUT", "DELETE"]
+        if req.method in methods:
+            self.method_dropdown.set_selected(methods.index(req.method))
+
+        # Set URL
+        self.url_entry.set_text(req.url)
+
+        # Clear headers
+        while child := self.headers_listbox.get_first_child():
+            self.headers_listbox.remove(child)
+
+        # Set headers
+        for key, value in req.headers.items():
+            self._add_header_row(key, value)
+
+        if not req.headers:
+            self._add_header_row()
+
+        # Set body
+        buffer = self.body_textview.get_buffer()
+        buffer.set_text(req.body)
+
+        # Switch to headers tab
+        self.request_stack.set_visible_child_name("headers")
+
+    def _on_delete_request(self, widget, saved_request, project):
+        """Delete saved request with confirmation."""
+        dialog = Adw.AlertDialog()
+        dialog.set_heading("Delete Request?")
+        dialog.set_body(f"Delete '{saved_request.name}'? This cannot be undone.")
+
+        dialog.add_response("cancel", "Cancel")
+        dialog.add_response("delete", "Delete")
+        dialog.set_response_appearance("delete", Adw.ResponseAppearance.DESTRUCTIVE)
+
+        def on_response(dlg, response):
+            if response == "delete":
+                self.project_manager.delete_request(project.id, saved_request.id)
+                self._load_projects()
+
+        dialog.connect("response", on_response)
+        dialog.present(self)