feat(projects): group Servers as an organizational lens

CHANGELOG.md

@@ -6,6 +6,23 @@ follows [SemVer](https://semver.org/).
 
 ## [Unreleased]
 
+### Added
+- **Projects** — a named grouping of Servers as an organizational lens
+  over the Fleet. A Server belongs to at most one Project; Servers
+  without a Project render as plain cards on the Fleet page (no
+  "Unassigned" pseudo-group). Manage from **Settings → Projects** (list,
+  inline create, rename, recolor, delete). Assign at server creation
+  time via the Add Server modal (with inline "Add new project") or from
+  a Server's settings tab. Server detail shows a color-tinted Project
+  badge near the title.
+- Audit events: `project.created`, `project.renamed`, `project.recolored`,
+  `project.deleted`, `server.project_assigned`, `server.project_unassigned`.
+  Deleting a Project cascade-unassigns its Servers (preserved with
+  `project_id` nulled) and emits one event per affected Server in the
+  same transaction.
+- New UI helpers `ui_project_group_header` and `ui_project_badge`
+  (`MastWeb.Components.UI.Domain`), with previews on `/dev/ui`.
+
 ## [0.6.0] - 2026-05-22
 
 ### Added

CLAUDE.md

@@ -49,6 +49,16 @@ We have a `./components.pen` file with the current UI design. When making
 ui changes, check the pencil mcp to see if the design is already there. 
 If not, STOP and ask for an update before implementing. This keeps the code and design in sync.
 
+**Responsiveness is non-negotiable for new components.** Any new helper
+added to `lib/mast_web/components/ui/*` must work across the full
+breakpoint scale on day one (Tailwind `sm:` / `md:` / `lg:` prefixes on
+layout, padding, font sizes, column counts; `flex-wrap` or
+`grid-cols-1 md:grid-cols-N` instead of fixed widths; `min-w-0 truncate`
+for text in flex children; ≥40px tap targets). Then add the component to
+`/dev/ui` so it can be previewed at multiple widths. Shipping a fixed-
+width component is a sweep waiting to happen — we've already done that
+sweep twice.
+
 
 ## Architecture decisions