feat: add Mux Robots API commands

[dylanjha]

Summary

• Adds mux robots command group with 10 subcommands covering the full Robots API
• Job management: list, get, delete, cancel
• Workflow commands: summarize, moderate, generate-chapters, ask-questions, find-key-moments, translate-captions
• Uses direct fetch calls via a shared src/lib/robots.ts helper (the Mux Node SDK does not yet support the Robots API)
• Surfaces specific API error messages (e.g. TOS acceptance required) instead of generic permission errors
• Updates README with full command documentation

Test plan

• 66 unit tests pass (bun test src/commands/robots/)
• Full test suite passes (743 tests, 0 failures)
• pnpm run check (biome) passes
• All 10 commands tested end-to-end against live Mux API (fam-vids environment)
• Verify --agent mode works with robots commands

🤖 Generated with Claude Code

---

Note

Medium Risk
Introduces new API-integrating commands and upgrades the Mux SDK, which may change runtime behavior or types; however changes are mostly additive and isolated to new command paths.

Overview
Adds a new mux robots command group wired into the main CLI, enabling job listing/retrieval/cancellation plus workflow job creation for summarize, moderate, generate chapters, ask questions, find key moments, and translate captions.

Updates docs to describe the new Robots commands/options and bumps @mux/mux-node to ^14.0.0 to use the robotsPreview API surface. Also hardens mux assets create --upload by erroring if Mux returns an upload without a signed url.

^{Reviewed by Cursor Bugbot for commit 68a7750. Bugbot is set up for automated code reviews on this repo. Configure here.}

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: --no-upload flag silently ignored due to wrong property
  • Updated translate-captions option handling to use Cliffy’s parsed upload === false value so --no-upload correctly sets upload_to_mux to false.

Or push these changes by commenting:

@cursor push 5e7498be26

Preview (5e7498be26)

diff --git a/src/commands/robots/translate-captions.ts b/src/commands/robots/translate-captions.ts
--- a/src/commands/robots/translate-captions.ts
+++ b/src/commands/robots/translate-captions.ts
@@ -5,7 +5,7 @@
 interface TranslateCaptionsOptions {
   trackId: string;
   toLanguageCode: string;
-  noUpload?: boolean;
+  upload?: boolean;
   passthrough?: string;
   json?: boolean;
 }
@@ -44,7 +44,7 @@
         track_id: options.trackId,
         to_language_code: options.toLanguageCode,
       };
-      if (options.noUpload) {
+      if (options.upload === false) {
         params.upload_to_mux = false;
       }

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^{Reviewed by Cursor Bugbot for commit f2f158f. Configure here.}