T-Builder 0.9.0

The rebuild: the plugin is a thin executor. The agent (the chat), its knowledge, its skills and the site profile moved to the account on tredcoo.ai; the platform runs the agent and calls the site's tools. Nothing waits on the site any more.

• POST /wp-json/t-builder/v1/run (includes/class-executor.php) runs one tool per signed request as the administrator who connected the site; GET /ping answers with the version. Signatures are an HMAC over time, method, route and body with a callback secret the site generates on connect and hands over in POST /v1/abilities; a site connected before 0.9.0 gets its secret on the next check, with no reconnect. The site key itself never leaves the site.
• Removed: class-chat.php and both chat routes, class-skills.php and the skills tool, class-profile.php with the profile and profile-update tools, the setup wizard, the model choice, the conversation export, the chat shortcuts; the options t_builder_chat, t_builder_chat_ref, t_builder_model, t_builder_job_*, t_builder_profile, t_builder_skills, t_builder_scan, the transient t_builder_account_skills, the user meta t_builder_job.
• New tool context, first in the list: the site (plugins as names), the toolbox lines, the project files (notes to 3000 characters) and the plugin version, so a turn starts with one read.
• New tool template-read: the template's original upload (the rendered copy when the original is gone) as its head, its @font-face blocks, font links and font families with counts, its colour variables and the 30 most used colours, a text or regex search with context, or a raw slice; linked stylesheets inside the upload count; every answer capped at 20 KB. Learned from a client's chat where the model said it had no tool to open the raw file and asked for CSS to be pasted.
• template-scan adds fonts, tokens (accent, background, heading, body, font_heading, font_body) and faces (families the template ships) per widget, straight from the engine's definitions.
• Self-updater (includes/class-updater.php): GET /v1/plugin/latest from the account, cached six hours in t_builder_latest, offered through update_plugins and the "View details" window; "Check for updates now" on the Settings tab.
• /v1/me may carry project { id, name, url }; the Settings tab shows a button to the site's project on tredcoo.ai, or the sentence to create one.
• Admin page: Settings (connection, project, tools, requirements, update, site facts, project files) and Activity. Header: plugin name, site name, version.
• T_BUILDER_REST_URL in wp-config.php names the address the platform reaches the executor at when that differs from the site's own REST URL (the Docker test site).