feat(canvas): add video-prompt node and enhance video generation support

- Introduced a new node type "video-prompt" for AI video generation, including its integration into the canvas command palette and node template picker.
- Updated connection validation to allow connections from text nodes to video-prompt and from video-prompt to ai-video nodes.
- Enhanced error handling and messaging for video generation failures, including specific cases for provider issues.
- Added tests to validate new video-prompt functionality and connection policies.
- Updated localization files to include new labels and prompts for video-prompt and ai-video nodes.

tests/lib/video-poll-logging.test.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from "vitest";
+
+import {
+  shouldLogVideoPollAttempt,
+  shouldLogVideoPollResult,
+} from "@/lib/video-poll-logging";
+
+describe("video poll logging", () => {
+  it("logs only the first and every fifth in-progress attempt", () => {
+    expect(shouldLogVideoPollAttempt(1)).toBe(true);
+    expect(shouldLogVideoPollAttempt(2)).toBe(false);
+    expect(shouldLogVideoPollAttempt(5)).toBe(true);
+    expect(shouldLogVideoPollAttempt(6)).toBe(false);
+  });
+
+  it("always logs terminal poll results", () => {
+    expect(shouldLogVideoPollResult(2, "IN_PROGRESS")).toBe(false);
+    expect(shouldLogVideoPollResult(5, "IN_PROGRESS")).toBe(true);
+    expect(shouldLogVideoPollResult(17, "COMPLETED")).toBe(true);
+    expect(shouldLogVideoPollResult(3, "FAILED")).toBe(true);
+  });
+});