Initial commit: v1.9.1 production firmware

Complete reverse engineering of TJ-56-654 weather clock from AliExpress.

Security fixes:
- Eliminated WiFi password leak vulnerability
- Removed dependency on Chinese cloud services (QWeather)
- Secure WiFiManager captive portal setup
- No hardcoded credentials

Features:
- Fully async architecture (zero blocking operations)
- OTA firmware updates (web + ArduinoOTA)
- NTP time sync with timezone + DST support
- Open-Meteo weather API (free, no registration)
- 3 display modes: time, weather, sunrise/sunset
- REST API + web interface
- EEPROM config persistence

Performance:
- Loop time: <1ms (was 10ms+)
- Memory: 409KB flash (38%), 38KB RAM (46%), 62KB IRAM (94%)
- Zero blocking delays

Hardware:
- ESP-01S (ESP8266EX, 1MB flash)
- GM009605v4.3 OLED display (128x64, I2C)
- Custom I2C mapping: SDA=GPIO0, SCL=GPIO2

Documentation:
- Complete installation guide
- Hardware specifications
- API documentation
- Troubleshooting guide
- Version history v1.5 → v1.9.1

Built with Claude Code (Opus 4.5)
Author: Andrey Petrochenko
Date: 2026-01-03

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,26 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: '[FEATURE] '
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.
+
+**Implementation ideas**
+If you have ideas about how to implement this, please share:
+- Code snippets
+- Library suggestions
+- Hardware requirements