Update ESP32 firmware roadmap - focus on hardware development

- Restructured roadmap to focus on ESP32 firmware development only
- Removed time constraints from all development phases
- Clarified data flow: ESP32 streams to webapp, webapp handles all logging
- Updated deliverables: firmware components, hardware integration, OLED support
- Removed PC software and web visualization phases (handled by separate webapp)
- Updated success criteria for ESP32 firmware performance metrics
- Updated dev notes to reflect webapp integration architecture

CLAUDE.md

@@ -35,8 +35,8 @@ pio device monitor
 
 ### Device Roles & Communication Flow
 ```
-Anchors: Auto-position ’ Store coordinates locally ’ Report to tags
-Tags: Range to anchors ’ Collect coordinates ’ USB to PC ’ Real-time + logging
+Anchors: Auto-position <EFBFBD> Store coordinates locally <20> Report to tags
+Tags: Range to anchors <EFBFBD> Collect coordinates <20> USB to PC <20> Real-time + logging
 ```
 
 ### Key Technical Patterns
@@ -86,10 +86,11 @@ Key values in config.h:
 
 ## Development Roadmap Context
 
-This system implements **Phase 1** of a 5-phase indoor positioning project (see docs/ROADMAP.md):
-- **Current**: Basic anchor-tag ranging with USB data collection
-- **Next**: Anchor auto-positioning, dual-file logging, PC software, web visualization
-- **Goal**: <15min warehouse setup, <30cm accuracy, real-time + offline analysis
+This ESP32 firmware implements the hardware foundation for the UWB positioning system (see docs/ROADMAP.md):
+- **Current**: Basic anchor-tag ranging with USB data streaming via UWBHelper library
+- **Next**: Anchor auto-positioning, coordinate relay through tag, battery optimization
+- **Goal**: <15min anchor setup, <30cm ranging accuracy, reliable USB data streaming to webapp
+- **WebApp Integration**: All data logging, visualization, and analysis handled by separate Next.js webapp
 
 ## Hardware Requirements