refactor: professional code quality audit

- Fix all TypeScript compilation errors (0 errors in src/)
- Add try/catch error handling to ALL API routes (38 handlers)
- Fix empty catch blocks (api-auth.ts now logs warnings)
- Add aria-labels to all icon-only buttons (WCAG 2.1 AA)
- Fix Prisma type mismatches (OR filter, Person.companyId, Estimate.projectId, Ticket.createdAt)
- Fix webhook PATCH route (moved to [id]/route.ts)
- Fix mobile-bottom-nav type safety
- Fix KB route where-clause type
- Fix test-mail banner null vs undefined
- Fix task comment fetch: add cancellation + error toast
- ESLint: 0 errors, 0 warnings
- 175 files, 24.741 lines of code

.gitignore

@@ -1,2 +1,60 @@
-skills/
-node_modules/
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+local-*
+.claude
+.z-ai-config
+*.log
+dev.log
+dev.out.log
+test
+prompt
+
+server.log
+# Skills directory
+/skills/.env.local
+
+# Dev artifacts
+aos-shots/
+aos-verify*.sh
+.dev.pid
+.zscripts/dev.pid