feat: v2 — queue matchmaking, procedural audio, sprite archetypes, auth

- Add queue-based matchmaking with Elo-proximity and 10s timeout
- Procedural sound engine (SFX, voice announcer, 4-track music)
- Sprite system refactored into 6 archetypes (standard, lobster, sheep, cyborg, blob, tank)
- 42+ fight choreographies with themed/generic/wild card selection
- 4 KO finish styles, super-speed mode, hyperdetail close-ups
- Auth routes, JoinBout page, bot profile with stats
- 7-tier ranking system (Baby through Legend)
- Arena and challenge system expansions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/refactor/SKILL.md

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+---
+name: refactor
+description: Refactor code for quality, maintainability, and adherence to project standards
+disable-model-invocation: true
+allowed-tools: Read, Edit, Write, Glob, Grep, Bash
+argument-hint: "[file-or-area]"
+---
+
+Refactor the specified code ($ARGUMENTS) following Archipelago coding standards.
+
+## Checklist
+
+### Rust Backend
+- [ ] No `unwrap()` or `expect()` — use `?` operator with context
+- [ ] Replace `#[allow(dead_code)]` — either use it or remove it
+- [ ] Functions under 50 lines, single responsibility
+- [ ] Custom error types per module with `thiserror`
+- [ ] `tracing` for logging — no `println!` or secrets in logs
+- [ ] Split files over 500 lines into focused modules
+- [ ] Run `cargo clippy --all-targets --all-features` mentally and fix issues
+
+### Vue Frontend
+- [ ] Extract ALL inline Tailwind to global classes in `neode-ui/src/style.css`
+- [ ] Use semantic class names: `.glass-card`, `.info-card`, `.glass-button`, `.path-option-card`
+- [ ] Replace ALL `.gradient-button` with `.glass-button` (gradient buttons are BANNED)
+- [ ] Replace ALL `.gradient-card` / `.gradient-card-dark` with `.glass-card` or `.path-option-card`
+- [ ] Settings.vue is the gold standard — all screens should match its patterns
+- [ ] Replace `any` types with proper interfaces or `unknown`
+- [ ] Ensure `<script setup lang="ts">` on all components
+- [ ] Remove dead code (unused imports, components like HelloWorld.vue)
+- [ ] Remove all `TODO`/`FIXME` — fix now or create GitHub issues
+- [ ] Consolidate `console.log` calls to use a logging utility
+- [ ] Split views over 800 LOC into sub-components
+
+### General
+- [ ] No hardcoded paths (`/Users/dorian/...`)
+- [ ] No hardcoded credentials — use env vars or secrets manager
+- [ ] Comment WHY not WHAT
+- [ ] Remove commented-out code entirely
+
+After refactoring, verify the code still compiles/type-checks. For frontend: `cd neode-ui && npm run type-check`. Do NOT deploy — leave that to `/deploy`.