harden terminal view, add $impeccable design docs, update AGENTS.md

PRODUCT.md

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+# Product
+
+## Register
+
+product
+
+## Users
+
+Islandflow is for serious individual traders and researchers working in live market conditions. They use real-time options flow, equity prints, inferred dark/off-exchange signals, and deterministic replay to investigate market behavior under pressure, where speed and confidence both matter.
+
+## Product Purpose
+
+Islandflow exists to help users quickly decide whether unusual market activity is meaningful, explainable, and actionable. The product should surface evidence fast enough to support real-time decisions, while preserving enough context and traceability to trust or dismiss a signal with confidence.
+
+## Brand Personality
+
+Precise, composed, forensic (with tactical tone when needed). The interface should feel like an instrument panel: utility-first, calm under load, and trustworthy. Brand voice should appear in orientation moments, empty states, onboarding, and high-level framing, while core workflows prioritize clarity, speed, and evidence.
+
+## Anti-references
+
+- Meme-stock or finfluencer-style trading apps that rely on hype, gamification, urgency theater, or promotional calls to action.
+- Generic SaaS analytics dashboards with decorative gradients, vague card stacks, and non-actionable vanity metrics.
+- Bloomberg-style visual density used as aesthetic cosplay instead of as a genuinely useful information structure.
+
+## Design Principles
+
+- Evidence before impression: every important signal should be explainable with clear supporting context.
+- Utility over theater: visual choices must improve legibility, prioritization, and decision speed.
+- Composure under volatility: interactions and layouts should remain stable and readable during bursts of market activity.
+- Trust through precision: labels, states, and data semantics should be explicit, unambiguous, and internally consistent.
+- Workflow-first framing: the interface should support investigative flow from detection to validation to action.
+
+## Accessibility & Inclusion
+
+- Target WCAG AA contrast at minimum across all core interfaces.
+- Support reduced motion preferences, especially for live ticks, pulses, chart transitions, and alert animations.
+- Never rely on red/green color alone for directionality or status; pair with text, icons, shape, and/or position.
+- Keep real-time updates readable by avoiding flashing effects, excessive animation, and layout shifts during high-volume periods.