Add edit capability to reports app for Directors Forecast

Adds a third capability 'edit' (Edit Directors Forecast) for the reports
app to gate pickup/dry/wet override saves and snapshot creation.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/db.js

@@ -286,8 +286,9 @@ export async function initDb() {
     SELECT a.id, c.slug, c.name, c.description, c.sort_order
     FROM apps a
     CROSS JOIN (VALUES
-      ('view',   'View & Run Reports', 'Browse and run all custom reports',                        1),
-      ('export', 'Export to CSV',      'Download report results as a CSV file',                    2)
+      ('view',   'View & Run Reports',     'Browse and run all custom reports',                        1),
+      ('export', 'Export to CSV',          'Download report results as a CSV file',                    2),
+      ('edit',   'Edit Directors Forecast', 'Edit pickup/dry/wet overrides and save forecast snapshots', 3)
     ) AS c(slug, name, description, sort_order)
     WHERE a.slug = 'reports'
     ON CONFLICT (app_id, slug) DO UPDATE SET