Title: test: add FollowButton unit tests

.env.example

@@ -1,22 +1,33 @@
-VITE_BACKEND_URL=/api
-# UTM settings for shared profile links (optional)
-# Set any of these to enable UTM parameters on shared profile URLs.
-VITE_UTM_SOURCE=twitter
-VITE_UTM_MEDIUM=social
-VITE_UTM_CAMPAIGN=share_profile
-#VITE_UTM_TERM=
-#VITE_UTM_CONTENT=
+# Access Layer Client — environment variables
+# Copy this file to `.env` and adjust values as needed:
+#   cp .env.example .env
+# All client-exposed variables must be prefixed with VITE_ (see https://vitejs.dev/guide/env-and-mode).
+# See CONTRIBUTING.md ("Environment variables") for which vars are required vs optional.
+
+# --- Required (sensible defaults provided) ---
+
+# Base URL for the backend API. Use the local backend during development.
 VITE_BACKEND_URL=http://localhost:3000/api/v1
+
+# Chain ID selected by default on load. 84532 = Base Sepolia testnet.
 VITE_DEFAULT_CHAIN_ID=84532
+
+# RPC URL for a local Anvil node (chain 31337). Used when developing against a local chain.
 VITE_ANVIL_RPC_URL=http://127.0.0.1:8545
+
+# RPC URL for the Base Sepolia testnet (chain 84532). The public default works out of the box.
 VITE_BASE_SEPOLIA_RPC_URL=https://sepolia.base.org
+
+# --- Optional ---
+
+# RPC URL for the Ethereum Sepolia testnet (chain 11155111). Get one from Alchemy, Infura, or another provider.
 VITE_SEPOLIA_RPC_URL=
+
+# RPC URL for Ethereum mainnet (chain 1). Only needed when testing against mainnet.
 VITE_MAINNET_RPC_URL=
 
-# UTM settings for shared profile links (optional)
-# Set any of these to enable UTM parameters on shared profile URLs.
-# Remove or comment out to disable UTM tracking.
-# Example configuration:
+# UTM parameters appended to shared profile links (optional).
+# Set any of these to enable UTM tracking; remove or leave blank to disable.
 VITE_UTM_SOURCE=accesslayer
 VITE_UTM_MEDIUM=share
 VITE_UTM_CAMPAIGN=profile-sharing

.gitignore

@@ -26,4 +26,17 @@ dist-ssr
 *.sln
 *.sw?
 issue.md
-pr.md
+pr.md
+
+# Test artifacts
+__snapshots__
+*.snap
+coverage
+.nyc_output
+
+# OS artifacts
+Thumbs.db
+
+# Lock files from other package managers
+package-lock.json
+yarn.lock

.kiro/specs/holder-count-cache-invalidation-test/.config.kiro

@@ -0,0 +1 @@
+{"specId": "a3f82c1e-9d47-4b8e-bc63-7e5a2f3d1094", "workflowType": "requirements-first", "specType": "feature"}