feat: speech overflow fix, 60+ voice profiles, post-fight audio cleanup

- Change speak() default to cancelPrevious=true so voices don't queue endlessly
- Add stopAllAudio() export and wire into FightViewer unmount + post-fight
- Flush speech queue at fight end with delayed cancel for clean cutoff
- Expand from 30 to 60+ voice profiles (robots, accents, game, characters)
- Add speech bubbles showing bot responses during rounds
- Wire announceFinishHim/Fatality/FlawlessVictory/Devastating to not cancel

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

server/src/routes/fights.ts

@@ -103,8 +103,12 @@ fightsRouter.get('/:id', async (c) => {
   })
 })
 
+// Dev-only mock fight endpoints (disabled in production)
+const isDev = process.env.NODE_ENV !== 'production'
+
 // Trigger a mock fight between two random bots (dev/testing)
 fightsRouter.post('/mock', async (c) => {
+  if (!isDev) return c.json({ error: 'Mock fights disabled in production.' }, 403)
   const allBots = await db.select({ id: schema.bots.id }).from(schema.bots)
 
   if (allBots.length < 2) {
@@ -123,6 +127,7 @@ fightsRouter.post('/mock', async (c) => {
 
 // Trigger a mock fight for a specific bot against a random opponent
 fightsRouter.post('/mock/:botId', async (c) => {
+  if (!isDev) return c.json({ error: 'Mock fights disabled in production.' }, 403)
   const botId = c.req.param('botId') as string
 
   const botRows = await db.select({ id: schema.bots.id })
@@ -150,6 +155,7 @@ fightsRouter.post('/mock/:botId', async (c) => {
 
 // Start a batch of mock fights (for seeding or overnight loop)
 fightsRouter.post('/mock/batch/:count', async (c) => {
+  if (!isDev) return c.json({ error: 'Fight loop disabled in production.' }, 403)
   const count = parseInt(c.req.param('count')) || 10
   const capped = Math.min(count, 500)