docs(maestro): describe the single-host architecture

Rewrites CLAUDE.md as the current-architecture reference, drops the
registry from INSTALL/PRODUCT/DESIGN and the web README, deletes the
registry Dockerfile, and marks the dated design specs superseded where
they describe the registry, JWT auth, or cross-host attach.

The installer loses its configure step — every config field now has a
default, so a daemon starts with no config file at all.

DESIGN.md

@@ -54,7 +54,7 @@ Tints/glow derive from the accent at low alpha: `--accent-tint` (0.12),
 ## Typography
 
 **Monospace is the UI typeface** (brand identity), system-stack only (offline-
-safe, zero web-font dependency, embedded clean into the registry binary):
+safe, zero web-font dependency, embedded clean into the web binary):
 
 - `--font-mono`: `ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace` — chrome, labels, data, ids, the wordmark.
 - `--font-sans`: `system-ui` stack — reserved for the few prose strings (empty-state sentences).
@@ -86,9 +86,8 @@ no bounce. Tokens `--dur-fast`/`--dur`/`--dur-slow`.
 ## Layout & structure
 
 Mobile-first, structural responsiveness (not fluid type). Single `≤520px`
-breakpoint stacks the header (full-width search, wrapped actions) and drops the
-daemon chips to their own wrapped line. `≥600px` switches the spawn modal from
-bottom-sheet to centered dialog. A faint slate grid texture sits on `--bg` as
+breakpoint stacks the header (full-width search, wrapped actions). `≥600px`
+switches the spawn modal from bottom-sheet to centered dialog. A faint slate grid texture sits on `--bg` as
 terminal atmosphere (very low contrast, not decoration).
 
 ## Components
@@ -96,10 +95,10 @@ terminal atmosphere (very low contrast, not decoration).
 Three surfaces, all DOM built in TS, styled by class:
 
 - **Catalog** — sticky blurred header (pulsing wordmark, search, theme toggle,
-  Spawn); status bar (`N sessions · M live` tally + daemon chips); session tree
-  (collapsible folders with counts, leaf rows with status dot, name, `@daemon`
-  + command meta, exited badge, reveal-on-hover kill). Empty states are
-  distinct and teach: waiting-for-daemon, no-sessions, no-search-match.
+  Spawn); status bar (`N sessions · M live` tally); session tree (collapsible
+  directory folders with counts, leaf rows with status dot, name, command meta,
+  exited badge, reveal-on-hover kill). Empty states are distinct and teach:
+  no-sessions, no-search-match.
 - **Attach** — header (back, `session <id>`, live/closed/error state pill) over
   a framed dark xterm with a green cursor.
 - **Spawn modal** — bottom-sheet/dialog form; mono inputs with green focus
@@ -112,5 +111,5 @@ status — never decoration.
 ## Dev review aids (DEV-only, stripped from production)
 
 `web/src/mock.ts` + query params seed a representative catalog without a running
-registry: `?mock` (seed sessions/daemons), `?mock&spawn` (open the spawn
-modal), `?theme=light|dark` (pin a theme). Guarded by `import.meta.env.DEV`.
+daemon: `?mock` (seed sessions), `?mock&spawn` (open the spawn modal),
+`?theme=light|dark` (pin a theme). Guarded by `import.meta.env.DEV`.