Add PM extension (Projects, Work Logs, Comments) + Quill rich-text UI

Projects: Brick-backed model with list/detail screens and nav entry.
Work Logs: per-contributor time ledger, assignee running-clock +
helper logged minutes with Hours/Minutes input; pause-after-save and
helper-deduct prompts.
Comments: threaded comments with file attachments and Quill composer.
Detail screen: tabbed layout (Work Log / Comments / Activity),
editable title + description via edit dialog, Quill-rendered
descriptions with legacy plain-text fallback.
Create dialog: fixed-width (480px max), Quill description editor.
Shared QuillFieldEditor + QuillReadOnly widgets extracted for reuse.
RLS: hardened activity-log actor binding, immutable creator_id/
created_at triggers, SECURITY INVOKER visibility helper,
append-only work-log and scoped comment policies.
Brick migration for project_id FK on programmer_tasks.

Co-Authored-By: claude-flow <ruv@ruv.net>

lib/widgets/app_shell.dart

@@ -460,13 +460,20 @@ List<NavSection> _buildSections(String role) {
       icon: Icons.task_outlined,
       selectedIcon: Icons.task,
     ),
-    if (role == 'admin' || role == 'programmer')
+    if (role == 'admin' || role == 'programmer') ...[
       NavItem(
         label: 'Programmer Tasks',
         route: '/programmer-tasks',
         icon: Icons.developer_mode_outlined,
         selectedIcon: Icons.developer_mode,
       ),
+      NavItem(
+        label: 'Projects',
+        route: '/programmer-projects',
+        icon: Icons.folder_outlined,
+        selectedIcon: Icons.folder,
+      ),
+    ],
     NavItem(
       label: 'IT Service Requests',
       route: '/it-service-requests',
@@ -723,6 +730,7 @@ String _routeToTitle(String location) {
     '/tickets'             => 'Tickets',
     '/tasks'               => 'Tasks',
     '/programmer-tasks'    => 'Programmer Tasks',
+    '/programmer-projects' => 'Projects',
     '/it-service-requests' => 'IT Service Requests',
     '/network-map'         => 'Network Map',
     '/notifications'       => 'Notifications',