fix(cli): handle malformed Bluesky profile URLs

[rissrice2105-agent]

Summary

• catch malformed percent-encoding in Bluesky profile URL paths
• return a clear user-facing validation error instead of a raw URIError
• add a focused regression test

Closes #727

Validation

• pnpm exec vitest run packages/cli/src/social-follow.test.ts (7 tests passed)
• pnpm --filter @profullstack/sh1pt... build
• pnpm --filter @profullstack/sh1pt typecheck

[greptile-apps]

Greptile Summary

This PR adds a try/catch around the decodeURIComponent mapping over Bluesky URL path segments, converting the raw URIError that is thrown for malformed percent-encoding (e.g. %E0%A4%A) into a user-friendly validation error. A focused regression test covers the new branch.

• social-follow.ts: Wraps url.pathname.split('/').filter(Boolean).map(decodeURIComponent) in a try/catch that rethrows as a readable Error containing the original input.
• social-follow.test.ts: Adds one regression test asserting that a URL with an incomplete percent-encoding sequence throws the expected message rather than a raw URIError.

Confidence Score: 5/5

Safe to merge — the change is a minimal, well-scoped guard on a single error path with a matching regression test.

The fix wraps exactly the code that can throw a URIError, the new error message is consistent with surrounding error messages in the same function, and the regression test correctly exercises the incomplete percent-encoding case. No existing behaviour is altered for valid inputs.

No files require special attention.

Important Files Changed

Filename	Overview
packages/cli/src/social-follow.ts	Adds a try/catch around the decodeURIComponent map call to surface a clear validation error instead of a raw URIError for malformed Bluesky profile URL paths.
packages/cli/src/social-follow.test.ts	Adds one regression test for the malformed percent-encoding case; test input and assertion match the implementation correctly.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[parseSocialFollowTarget input] --> B{new URL succeeds?}
    B -- No --> C{bluesky platform or actor-like?}
    C -- Yes --> D[Return bare actor target]
    C -- No --> E[Throw: Expected a social account URL]
    B -- Yes --> F{host === bsky.app?}
    F -- No --> G[Throw: only supports bsky.app URLs]
    F -- Yes --> H[try: pathname.split.filter.map decodeURIComponent]
    H -- URIError / any error --> I[Throw: Could not parse Bluesky profile URL input]
    H -- Success --> J{profileIndex found?}
    J -- No --> K[Throw: Could not find handle or DID]
    J -- Yes --> L[Extract actor and source tab]
    L --> M[Return SocialFollowTarget]

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_{Reviews (2): Last reviewed commit: "fix(cli): handle malformed Bluesky profi..." | Re-trigger Greptile}

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