feat(ui): add Run interactively action to task context menu

Spawns Windows Terminal in the list working directory running
`claude --permission-mode auto` with the task title and description
prefilled as the initial prompt. Reuses the planning launcher
infrastructure but skips worktree, system prompt, and MCP setup.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/ClaudeDo.Worker/Planning/InteractiveLaunchContext.cs

@@ -0,0 +1,6 @@
+namespace ClaudeDo.Worker.Planning;
+
+public sealed record InteractiveLaunchContext(
+    string TaskId,
+    string WorkingDir,
+    string InitialPrompt);