Add board photos and Home Assistant dashboard 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/`): bare fabricated board (front/back), assembled and
+  soldered board (front/back), an active CO₂ measurement shot, and a Home
+  Assistant dashboard screenshot. Committed to the tree and embedded in the
+  README and the v1.0.0 release notes.
+
 ## [1.0.0] - 2026-10-19
 
 First public release of the ESP32-C3 CO₂ & environment sensor board (prototype v1).

README.md

@@ -18,6 +18,33 @@ running.
 
 ![3D render](docs/esp-sensair-3d-top.png)
 
+## Photos
+
+Photos of the prototype live in [`photos/`](photos/), are embedded below, and are shown
+in the [v1.0.0 release notes](https://git.honney333.work/honney/esp_sensair/releases/tag/v1.0.0).
+
+Bare fabricated board, straight from the fab (front and back):
+
+| | |
+|---|---|
+| ![Bare fabricated board, front side](photos/frontside.jpg) | ![Bare fabricated board, back side](photos/backside.jpg) |
+| Front side | Back side |
+
+Assembled and soldered (front and back):
+
+| | |
+|---|---|
+| ![Assembled board, front side, soldered](photos/frontside_soldered.jpg) | ![Assembled board, 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 +204,7 @@ 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 prototype board (v1). They are embedded in the
+[README](../README.md) and shown in the
+[v1.0.0 release notes](https://git.honney333.work/honney/esp_sensair/releases/tag/v1.0.0).
 
-- `top.jpg`      assembled board, front side, all parts visible
-- `bottom.jpg`   solder side
-- `installed.jpg` board in its final location / enclosure
-- `running.jpg`  Home Assistant dashboard showing live values
-
-Add them to the README once taken:
-
-    ![Assembled board, top](photos/top.jpg)
-    ![Assembled board, bottom](photos/bottom.jpg)
+| File | Description |
+|---|---|
+| `frontside.jpg` | bare fabricated board, front side (straight from the fab) |
+| `backside.jpg` | bare fabricated board, back side (straight from the fab) |
+| `frontside_soldered.jpg` | assembled board, front side, soldered |
+| `backside_soldered.jpg` | assembled board, back side, soldered |
+| `active_co2_measurement.jpg` | board running, active CO₂ measurement |
+| `sensor_current_homeassistant.png` | Home Assistant dashboard with live values |