feat(28-01): add Shift+V keyboard shortcut for video nodes

- Add case 'v' to node creation hotkeys in WorkflowCanvas
- Creates generateVideo node at viewport center
- Update CLAUDE.md documentation with new shortcut

CLAUDE.md

@@ -116,6 +116,7 @@ Returns `{ images: string[], text: string | null }`.
 - `Shift + P` - Add prompt node at center
 - `Shift + I` - Add image input node
 - `Shift + G` - Add generate (nanoBanana) node
+- `Shift + V` - Add video (generateVideo) node
 - `Shift + L` - Add LLM node
 - `Shift + A` - Add annotation node
 - `H` - Stack selected nodes horizontally

src/components/WorkflowCanvas.tsx

@@ -767,6 +767,9 @@ export function WorkflowCanvas() {
           case "g":
             nodeType = "nanoBanana";
             break;
+          case "v":
+            nodeType = "generateVideo";
+            break;
           case "l":
             nodeType = "llmGenerate";
             break;