Add multi-account OAuth, Obsidian integration, product assets, and test tooling

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -3,6 +3,12 @@
 YAHOO_EMAIL=you@yahoo.com
 YAHOO_APP_PASSWORD=xxxx xxxx xxxx xxxx
 
+# ── Gmail ────────────────────────────────────────────────────────────────────
+# Generate an App Password at: https://myaccount.google.com/apppasswords
+# Requires 2-Step Verification to be enabled on your Google account
+GMAIL_EMAIL=you@gmail.com
+GMAIL_APP_PASSWORD=xxxx xxxx xxxx xxxx
+
 # ── Optional: Custom IMAP/SMTP Server ────────────────────────────────────────
 # Uncomment and configure these if you want to use a second email account
 # CUSTOM_EMAIL=you@yourdomain.com
@@ -12,5 +18,22 @@ YAHOO_APP_PASSWORD=xxxx xxxx xxxx xxxx
 # CUSTOM_SMTP_HOST=mail.yourdomain.com
 # CUSTOM_SMTP_PORT=587
 
+# ── MySQL ────────────────────────────────────────────────────────────────────
+MYSQL_HOST=127.0.0.1
+MYSQL_PORT=3306
+MYSQL_USER=root
+MYSQL_PASSWORD=your-mysql-password
+
 # ── Server ───────────────────────────────────────────────────────────────────
 PORT=3456
+MCP_API_KEY=your-secret-api-key
+
+# ── Obsidian Vault ───────────────────────────────────────────────────────────
+# Path to the vault directory inside the container (mount in docker-compose.yml)
+OBSIDIAN_VAULT_PATH=/vaults
+# Syncthing GUI URL (accessible from within the container via host.docker.internal)
+SYNCTHING_URL=http://host.docker.internal:8384
+# API key from ~/.config/syncthing/config.xml → <apikey>
+SYNCTHING_API_KEY=your-syncthing-api-key
+# Folder ID as set in Syncthing config
+SYNCTHING_FOLDER_ID=obsidian-vault