AI assist, accounts, bigger dashboard

• New AI layer on every flag, nudges confidence up or down from kNN and online logistic regression trained on your labels
• New AI live feed, see each decision with verdict, neighbour dots, agreement bar, probability donut
• New Learned weights panel, shows which features the AI trusts per check
• New mass-FP detector, proposes suppression rules you approve with one click
• New account system, one login for forums and the dashboard
• New pairing flow, requires a free account so servers survive cookie clears
• Already signed in? Pair auto-links to your account, nothing else to click
• Existing browser-only servers auto-merge into your account the moment you sign in
• Recovery codes issued at pair time as a backup
• Flags now carry 30+ features, a replay window and a session summary
• Settings page gained AI, FP filter, Replay, Ping compensation, Bedrock, per-check severity sliders
• Hourly chart now shows am/pm at 6h intervals
• Account reminder banner for browser-only paired servers
• New config paths: ai.enabled, ai.max_adjustment, ai.min_agreement, ai.verdict_ttl_seconds, ai.send_features