Add board photos (1600 px, optimized) and Home Assistant screenshot; integrate into README, photos index, changelog

CHANGELOG.md

@@ -3,6 +3,15 @@
 All notable changes to this project are documented here.
 The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## [Unreleased]
+
+### Added
+
+- **Photos** (`photos/`): assembled-board photos (front/back, assembled and
+  soldered), an active CO₂ measurement shot, and a Home Assistant dashboard
+  screenshot. Committed to the tree, embedded in the README, and attached as
+  assets to the v1.0.0 release.
+
 ## [1.0.0] - 2026-10-19
 
 First public release of the ESP32-C3 CO₂ & environment sensor board (prototype v1).

README.md

@@ -18,6 +18,29 @@ running.
 
 ![3D render](docs/esp-sensair-3d-top.png)
 
+## Photos
+
+Photos of the assembled prototype are in [`photos/`](photos/) and attached to the
+[latest release](https://git.honney333.work/honney/esp_sensair/releases/latest).
+
+| | |
+|---|---|
+| ![Assembled board, front side](photos/frontside.jpg) | ![Assembled board, back side](photos/backside.jpg) |
+| Front side (assembled) | Back side (assembled) |
+
+| | |
+|---|---|
+| ![Front side, soldered](photos/frontside_soldered.jpg) | ![Back side, soldered](photos/backside_soldered.jpg) |
+| Front side, soldered | Back side, soldered |
+
+Running, with an active CO₂ measurement:
+
+![Active CO₂ measurement](photos/active_co2_measurement.jpg)
+
+Live values on the Home Assistant dashboard:
+
+![Home Assistant dashboard](photos/sensor_current_homeassistant.png)
+
 ## Block diagram
 
 ```
@@ -177,7 +200,7 @@ ESPHome on `esp32-c3-devkitm-1`, framework **esp-idf**. Config template:
 ├── bom/                         bill of materials (CSV)
 ├── docs/                        schematic PDF, layer plots, 3D render
 ├── firmware/                    ESPHome config templates, secrets templates, notes
-├── photos/                      photographs of the assembled board
+├── photos/                      photographs of the assembled board (also release assets)
 ├── CHANGELOG.md                 release history
 ├── LICENSE                      CERN-OHL-S-2.0 (hardware)
 └── LICENSE.MIT                  MIT (firmware config, BOM, docs)

photos/README.md

@@ -1,13 +1,14 @@
-Photographs of the assembled board.
+# Photos
 
-Suggested shots for the README (top-down, evenly lit, plain background, 1600 px wide):
+Photographs of the assembled prototype board (v1). The same files are attached as
+assets on the [latest release](https://git.honney333.work/honney/esp_sensair/releases/latest)
+and embedded in the [README](../README.md).
 
-- `top.jpg`      assembled board, front side, all parts visible
+| File | Description |
-- `bottom.jpg`   solder side
+|---|---|
-- `installed.jpg` board in its final location / enclosure
+| `frontside.jpg` | assembled board, front side |
-- `running.jpg`  Home Assistant dashboard showing live values
+| `backside.jpg` | assembled board, back side |
-
+| `frontside_soldered.jpg` | front side, soldered |
-Add them to the README once taken:
+| `backside_soldered.jpg` | back side, soldered |
-
+| `active_co2_measurement.jpg` | board running, active CO₂ measurement |
-    ![Assembled board, top](photos/top.jpg)
+| `sensor_current_homeassistant.png` | Home Assistant dashboard with live values |
-    ![Assembled board, bottom](photos/bottom.jpg)