fix: Round 14 — 28 Tier 1 + Tier 2 bugs fixed across 17 source files

fix: pre-release audit round 12 — 33 bugs fixed across all tiers

feat: brief KB overview for system prompt + original query cross-check

fix: SQL fuzzy matching fallback for country names with alternate forms

feat: LLM-generated welcome summary for knowledge base contents

feat: show KB overview summary on welcome page in both CLI and web UI

fix: Round 8 audit — 15 bugs fixed across 10 files (1 CRITICAL, 7 HIGH, 3 MEDIUM, 4 LOW)

fix: 10 bugs (4 HIGH + 6 MEDIUM) from comprehensive codebase audit

fix: harden source display, subdirectory paths, and chunk ID uniqueness

fix: improve clarification context and meta-question routing

fix: prevent NameError when QU disabled and fix connection leak

feat: wire SQL routing through CLI and web UI

fix: harden codebase against format injection, empty responses, and unsafe config access

feat: add query understanding layer for better retrieval

style: hide distance scores from /sources output

feat: show web search status in welcome panel

style: make welcome message more personal and conversational

feat: add chatbot introduction to CLI welcome panel

Initial commit: RAG Research Chatbot Template