feat: harden live spectator mode

[kimanicode]

Closes #587

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Summary

Implements and hardens the live match spectator mode work for issue #587.

• Fixes live move list rendering by adding stable keys for grouped move rows
• Expands spectator utility test coverage for clock normalization, malformed move payloads, and captured-piece symbols
• Expands spectator WebSocket tests for sync, incremental move updates, clock updates, spectator counts, game-over events, and malformed messages
• Adds local react-icons type declarations so frontend TypeScript checks pass

Summary by CodeRabbit

Release Notes

• Tests

  • Expanded test coverage for spectator utilities and socket integration, including validation of edge cases and malformed input handling.

• Chores

  • Added TypeScript type definitions for icon library imports.
  • Improved component rendering optimization.

[coderabbitai]

📝 Walkthrough

Walkthrough

These changes expand test coverage for spectator utilities and socket handling, introduce TypeScript declarations for react-icons components, and refactor fragment handling in SpectatorMoveList for improved React reconciliation during rendering.

Changes

Cohort / File(s)	Summary
Test Coverage Expansion frontend/__tests__/spectatorUtils.test.ts, frontend/__tests__/useSpectatorSocket.test.ts	New test cases added: spectatorUtils.test.ts covers edge cases for formatClock (negative seconds, non-integers) and adds tests for getCapturedPieceSymbols piece-to-symbol translation; useSpectatorSocket.test.ts introduces integration tests validating socket message handling (move, clock, spectator_count, game_over) and error handling for malformed payloads.
Type Declarations frontend/types/react-icons.d.ts	New TypeScript module declarations for react-icons/fa and react-icons/ri, defining IconType as ComponentType<SVGProps<SVGSVGElement>> and exporting specific icon components (e.g., FaBolt, FaSearch, RiAiGenerate, RiRobot2Line).
Component Refactoring frontend/components/watch/SpectatorMoveList.tsx	Migrated from unkeyed React fragments (<>...</>) to keyed Fragment components to improve React reconciliation during move row mapping and rendering.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 In tests we trust, with coverage bright,
Icons typed, our imports right,
Fragments keyed for render's grace,
Spectators watch from every space! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: hardening live spectator mode through bug fixes (stable keys for move list rendering) and expanded test coverage for utilities and WebSocket integration.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[drips-wave]

@kimanicode Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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[coderabbitai]

🧹 Nitpick comments (1)

frontend/types/react-icons.d.ts (1)

36-44: Consider removing unused icon declarations or documenting their purpose.

All icons currently imported from react-icons/ri in the codebase (RiAliensFill) are properly declared. However, RiAiGenerate and RiRobot2Line are declared but never imported or used anywhere. Either remove these unused declarations or add a comment explaining they are intentional future placeholders.

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@frontend/types/react-icons.d.ts` around lines 36 - 44, The declarations
RiAiGenerate and RiRobot2Line are unused placeholders while RiAliensFill is
actually used; either remove the unused exports (delete the declarations for
RiAiGenerate and RiRobot2Line) or add a short comment above them documenting
they are intentional future placeholders (e.g., "// reserved for future icons:
RiAiGenerate, RiRobot2Line") so reviewers know they are deliberate; update the
declarations block that currently exports IconType and the three symbols
(RiAiGenerate, RiAliensFill, RiRobot2Line) accordingly.

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@frontend/types/react-icons.d.ts`:
- Around line 36-44: The declarations RiAiGenerate and RiRobot2Line are unused
placeholders while RiAliensFill is actually used; either remove the unused
exports (delete the declarations for RiAiGenerate and RiRobot2Line) or add a
short comment above them documenting they are intentional future placeholders
(e.g., "// reserved for future icons: RiAiGenerate, RiRobot2Line") so reviewers
know they are deliberate; update the declarations block that currently exports
IconType and the three symbols (RiAiGenerate, RiAliensFill, RiRobot2Line)
accordingly.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 9b9c32e1-200c-49bb-88a0-ac14541b9af0

📥 Commits

Reviewing files that changed from the base of the PR and between 8f92605 and 0711ae9.

📒 Files selected for processing (4)

• frontend/__tests__/spectatorUtils.test.ts
• frontend/__tests__/useSpectatorSocket.test.ts
• frontend/components/watch/SpectatorMoveList.tsx
• frontend/types/react-icons.d.ts

[kimanicode]

Closes #587

Summary

Implements and hardens the live match spectator mode work for issue #587.

• Fixes live move list rendering by adding stable keys for grouped move rows
• Expands spectator utility test coverage for clock normalization, malformed move payloads, and captured-piece symbols
• Expands spectator WebSocket tests for sync, incremental move updates, clock updates, spectator counts, game-over events, and malformed messages
• Adds local react-icons type declarations so frontend TypeScript checks pass

Summary by CodeRabbit

Release Notes

• Tests

  • Expanded test coverage for spectator utilities and socket integration, including validation of edge cases and malformed input handling.

• Chores

  • Added TypeScript type definitions for icon library imports.
  • Improved component rendering optimization.

[kimanicode]

Hi @gabito1451 , just check in on this PR when you get a chance. Happy to make any changes if needed.