Self-hosted z3.sx translator, prove.sx prover, parser unicode, auto reader macros

- z3.sx: SX-to-SMT-LIB translator written in SX (359 lines), replaces Python translation logic
- prove.sx: SMT-LIB satisfiability checker in SX — proves all 91 primitives sat by construction
- Parser: support unicode characters (em-dash, accented letters) in symbols
- Auto-resolve reader macros: #name finds name-translate in component env, no Python registration
- Platform primitives: type-of, symbol-name, keyword-name, sx-parse registered in primitives.py
- Cond heuristic: predicates ending in ? recognized as Clojure-style tests
- Library loading: z3.sx loaded at startup with reload callbacks for hot-reload ordering
- reader_z3.py: rewritten as thin shell delegating to z3.sx
- Split monolithic .sx files: essays (22), plans (13), reactive-islands (6) into separate files

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

sx/sx/plans/glue-decoupling.sx

@@ -0,0 +1,49 @@
+;; ---------------------------------------------------------------------------
+;; Glue Decoupling
+;; ---------------------------------------------------------------------------
+
+(defcomp ~plan-glue-decoupling-content ()
+  (~doc-page :title "Cross-App Decoupling via Glue Services"
+
+    (~doc-section :title "Context" :id "context"
+      (p "All cross-domain FK constraints have been dropped (with pragmatic exceptions for OrderItem.product_id and CartItem). Cross-domain writes go through internal HTTP and activity bus. However, " (strong "25+ cross-app model imports remain") " — apps still import from each other's models/ directories. This means every app needs every other app's code on disk to start.")
+      (p "The goal: eliminate all cross-app model imports. Every app only imports from its own models/, from shared/, and from a new glue/ service layer."))
+
+    (~doc-section :title "Current state" :id "current"
+      (p "Apps are partially decoupled via HTTP interfaces (fetch_data, call_action, send_internal_activity) and DTOs. The Cart microservice split (relations, likes, orders) is complete. But direct model imports persist in:")
+      (ul :class "list-disc pl-5 text-stone-700 space-y-1"
+        (li (strong "Cart") " — 9 files importing from market, events, blog")
+        (li (strong "Blog") " — 8 files importing from cart, events, market")
+        (li (strong "Events") " — 5 files importing from blog, market, cart")
+        (li (strong "Market") " — 1 file importing from blog")))
+
+    (~doc-section :title "What remains" :id "remains"
+      (div :class "space-y-3"
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "1. glue/services/pages.py")
+          (p :class "text-sm text-stone-600" "Dict-based Post access for non-blog apps: get_page_by_slug, get_page_by_id, get_pages_by_ids, page_exists, search_posts."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "2. glue/services/page_config.py")
+          (p :class "text-sm text-stone-600" "PageConfig CRUD: get_page_config, get_or_create_page_config, get_page_configs_by_ids."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "3. glue/services/calendars.py")
+          (p :class "text-sm text-stone-600" "Calendar queries + entry associations (from blog): get_calendars_for_page, toggle_entry_association, get_associated_entries."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "4. glue/services/marketplaces.py")
+          (p :class "text-sm text-stone-600" "MarketPlace CRUD (from blog+events): get_marketplaces_for_page, create_marketplace, soft_delete_marketplace."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "5. glue/services/cart_items.py")
+          (p :class "text-sm text-stone-600" "CartItem/CalendarEntry queries for cart: get_cart_items, find_or_create_cart_item, clear_cart_for_order."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "6. glue/services/products.py")
+          (p :class "text-sm text-stone-600" "Minimal Product access for cart orders: get_product."))
+        (div :class "rounded border border-stone-200 p-3"
+          (h4 :class "font-semibold text-stone-700" "7. Model registration + cleanup")
+          (p :class "text-sm text-stone-600" "register_models() in glue/setup.py, update all app.py files, delete moved service files."))))
+
+    (~doc-section :title "Docker consideration" :id "docker"
+      (p :class "text-stone-600" "For glue services to work in Docker (single app per container), model files from other apps must be importable. Recommended: try/except at import time — glue services that can't import a model raise ImportError at call time, which only happens if called from the wrong app."))))
+
+;; ---------------------------------------------------------------------------
+;; Social Sharing
+;; ---------------------------------------------------------------------------