Room limit

[Gawor270]

No description provided.

[linear]

FCE-2483 Add players limit to 4 per room

[Copilot]

Pull request overview

This pull request implements a room player limit feature for the Deep Sea Stories application. The implementation adds a maximum capacity of 4 players per room, with proper error handling when attempting to join a full room, and a UI indicator showing current player count against the limit.

Key Changes

• Introduces a ROOM_PLAYERS_LIMIT constant (set to 4) shared across backend and frontend
• Implements server-side validation that prevents additional players from joining full rooms
• Adds a visual player count indicator component showing "X/4" players in the game view

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/common/src/constants.ts	Defines the new ROOM_PLAYERS_LIMIT constant (4 players)
packages/common/src/index.ts	Exports the room limit constant for cross-package usage
packages/backend/src/domain/errors.ts	Adds GameRoomFullError class and removes unused error definitions
packages/backend/src/game/room.ts	Implements player limit check in addPlayer method before peer creation
packages/backend/src/controllers/peers.ts	Catches room full errors and converts them to user-facing TRPC errors
packages/backend/src/controllers/stories.ts	Removes unused FailedToStartStoryError import and usage
packages/web/src/components/PlayerCountIndicator.tsx	New component displaying current player count vs limit with icon
packages/web/src/views/GameView.tsx	Calculates player count and renders the indicator component in the UI
packages/web/src/views/JoinView.tsx	Adds error handling to display user-friendly messages for room capacity errors

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[AHGIJMKLKKZNPJKQR]

When someone leaves (e.g. by closing their browser tab), they don't release their slot, effectively making the room limit 3