chore: initialize beadboard baseline

README.md

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+# BeadBoard
+
+Windows-native Beads dashboard built with Next.js 15, React 19, and TypeScript.
+
+## Core Rules
+- Read source of truth from `.beads/issues.jsonl`.
+- Perform all writes through `bd.exe`.
+- Never write directly to `.beads/issues.jsonl`.
+- Use Windows-safe path normalization for all project path operations.
+
+## Stack
+- Next.js 15 (App Router)
+- React 19
+- TypeScript (strict)
+
+## Local Development
+- `npm install`
+- `npm run dev`
+- `npm run typecheck`
+- `npm run test`
+
+## Scope
+BeadBoard provides Kanban, dependency graph, timeline, and agent-session views over one or more registered Windows project roots.