feat: expense/invoice popups, task row hover fix, delivery submissions

- Expense detail popup: 80vw×80vh, inline editing, save gated on dirty state, Download Receipt in footer
- Add expense form: same layout with FileAttachment drag-drop on right
- New invoice popup: 80vw×80vh inline form replacing navigate-away page
- Tasks table: suppress row hover background, only Name/Project table-links highlight
- TaskDetail Submissions tab: reads from deliveries table, shows R## version, sent_by, message
- Submit for Review: writes to deliveries + delivery_files (deliveries bucket)
- deliveries.version_number column added and backfilled from revision history
- Port 4173 for dev server

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

.agents/plugins/marketplace.json

@@ -0,0 +1,20 @@
+{
+  "name": "local-plugins",
+  "interface": {
+    "displayName": "Local Plugins"
+  },
+  "plugins": [
+    {
+      "name": "caveman",
+      "source": {
+        "source": "local",
+        "path": "./.codex-plugins/caveman"
+      },
+      "policy": {
+        "installation": "AVAILABLE",
+        "authentication": "ON_INSTALL"
+      },
+      "category": "Productivity"
+    }
+  ]
+}