feat: Agent Orchestrator — multi-project agent dashboard

Tauri + Svelte 5 + Rust application for orchestrating multiple AI coding agents.
Includes Claude, Aider, Codex, and Ollama provider support, multi-agent
communication (btmsg/bttask), session anchors, plugin sandbox, FTS5 search,
Landlock sandboxing, and 507 vitest + 110 cargo tests.

.claude/rules/12-performance-awareness.md

@@ -0,0 +1,26 @@
+---
+paths:
+  - "src/**/*.{ts,js,py,go,rs,dart,kt,java}"
+  - "lib/**/*.{ts,js,py,go,rs,dart,kt,java}"
+  - "app/**/*.{ts,js,py,go,rs,dart,kt,java}"
+---
+
+# Performance Awareness
+
+Prevent anti-patterns that are expensive to fix later — not premature optimization.
+
+## Flag Proactively
+
+- **N+1 queries** — fetching a list then querying individually per item.
+- **Unbounded fetches** — no pagination or limits.
+- **O(n^2) when O(n) exists** — nested loops, repeated scans, quadratic string building.
+- **Loading into memory** — entire files/datasets when streaming is possible.
+- **Missing indexes** — unindexed columns in tables expected to grow beyond 10k rows.
+- **Synchronous blocking** — blocking event loop/main thread during I/O.
+- **Connection pool exhaustion** — new connections per request instead of pooling.
+- **Unverified slow queries** — use EXPLAIN/EXPLAIN ANALYZE; don't guess about indexes.
+
+## Rules
+
+- Flag anti-patterns and offer to fix or create a TODO.
+- Quantify: "loads ~10MB per request" not "might use a lot of memory."