Add sidebar sparklines, data health badge, hypothesis tracker, insight cards

Fix TDZ error: move auto-send useEffect after streamMessage declaration

Auto-send calibration prompt after task card loads dataset

Redesign ClaudeQuant: narrow scope to experiments & research

Clean up dead tool handler code from route.js

Fix hallucinated tool calls: tell Claude no tools + strip from output

Format question answers as clean bold/unbolded pairs

Remove tools, switch to Opus 4.6

Restore original full system prompt (remove compression)

Remove skill card system, simplify to single system prompt

Compress prompts 70% + add conversation windowing for rate limit

Switch to claude-sonnet-4-5 (higher rate limit on current API tier)

Switch model to claude-opus-4-5 to avoid rate limit on opus-4-6

Remove explicit code_execution tool (auto-injected by web_fetch/web_search)

Increase max_tokens to 32768 and show truncation notice