Chat identity rework

Reworked how player identity works in chat. Previously players could toggle between showing their character name or their account display name, which created confusion around whispers and player inspection — especially for accounts with multiple characters. The toggle is gone. Chat now always shows your display name, the account-level identity that persists across all your characters.

Whispers now resolve by display name only. Typing /w followed by a character name no longer works. This removes ambiguity: you always know exactly who you're talking to, and the target can't change by switching characters.

Clicking a player name in chat still opens the full inspection modal, but the layout is restructured. Display name is now the primary header with role badge and corporation tag. Below that, an "Active Nomad" section shows what character they're currently playing: class, level, title, and all the usual gear and stats. Your account identity is permanent and visible, your character identity is what you're playing right now.