feat: add TodoMVC example with editorial design

Full TodoMVC implementation using Pocketbook's synced atom:
- Add, toggle, edit (double-click), destroy todos
- Filter: All / Active / Completed
- Toggle all, clear completed
- Live sync status indicator (online/offline/pending)
- Data persists in IndexedDB, syncs to server via Transit

Design: Ink & Paper aesthetic — cream paper background with grain
texture, Instrument Serif italic header, Newsreader body text,
DM Mono UI chrome, terracotta accent with green completion marks,
deckled left border on card.

Also:
- Server now serves static files from resources/public (/ → todomvc.html)
- Fix CLJS compilation: resolve close!/put! naming conflicts with
  core.async, use qualified async/close!, add clojure.string require
- Fix unbalanced parens in do-pull!
- Remove old placeholder example

src/pocketbook/idb.cljs

@@ -2,7 +2,7 @@
   "IndexedDB wrapper with Transit serialization.
    Stores documents as Transit-encoded strings preserving all Clojure types."
   (:require [cognitect.transit :as t]
-            [cljs.core.async :refer [chan put! close!]]))
+            [cljs.core.async :as async :refer [chan put!]]))
 
 ;; ---------------------------------------------------------------------------
 ;; Transit
@@ -40,11 +40,11 @@
     (set! (.-onsuccess req)
       (fn [e]
         (put! ch (.-result (.-target e)))
-        (close! ch)))
+        (async/close! ch)))
     (set! (.-onerror req)
       (fn [e]
         (js/console.error "IDB open error:" e)
-        (close! ch)))
+        (async/close! ch)))
     ch))
 
 (defn- tx
@@ -68,8 +68,8 @@
                    :deleted (boolean (:deleted doc false))
                    :synced  (boolean (:synced doc false))}
         req   (.put store obj)]
-    (set! (.-onsuccess req) (fn [_] (put! ch true) (close! ch)))
-    (set! (.-onerror req) (fn [e] (js/console.error "IDB put error:" e) (close! ch)))
+    (set! (.-onsuccess req) (fn [_] (put! ch true) (async/close! ch)))
+    (set! (.-onerror req) (fn [e] (js/console.error "IDB put error:" e) (async/close! ch)))
     ch))
 
 (defn put-docs!
@@ -86,8 +86,8 @@
                      :deleted (boolean (:deleted doc false))
                      :synced  (boolean (:synced doc false))}]
         (.put store obj)))
-    (set! (.-oncomplete txn) (fn [_] (put! ch true) (close! ch)))
-    (set! (.-onerror txn) (fn [e] (js/console.error "IDB batch put error:" e) (close! ch)))
+    (set! (.-oncomplete txn) (fn [_] (put! ch true) (async/close! ch)))
+    (set! (.-onerror txn) (fn [e] (js/console.error "IDB batch put error:" e) (async/close! ch)))
     ch))
 
 (defn get-doc
@@ -107,9 +107,9 @@
                       :updated (.-updated result)
                       :deleted (.-deleted result)
                       :synced  (.-synced result)}))
-          (close! ch))))
+          (async/close! ch))))
     (set! (.-onerror req)
-      (fn [e] (js/console.error "IDB get error:" e) (close! ch)))
+      (fn [e] (js/console.error "IDB get error:" e) (async/close! ch)))
     ch))
 
 (defn get-all-by-prefix
@@ -137,9 +137,9 @@
               (.continue cursor))
             (do
               (put! ch @docs)
-              (close! ch))))))
+              (async/close! ch))))))
     (set! (.-onerror req)
-      (fn [e] (js/console.error "IDB cursor error:" e) (close! ch)))
+      (fn [e] (js/console.error "IDB cursor error:" e) (async/close! ch)))
     ch))
 
 (defn get-unsynced
@@ -166,9 +166,9 @@
               (.continue cursor))
             (do
               (put! ch @docs)
-              (close! ch))))))
+              (async/close! ch))))))
     (set! (.-onerror req)
-      (fn [e] (js/console.error "IDB unsynced error:" e) (close! ch)))
+      (fn [e] (js/console.error "IDB unsynced error:" e) (async/close! ch)))
     ch))
 
 (defn delete-doc!
@@ -178,8 +178,8 @@
         txn   (tx db "docs" :readwrite)
         store (.objectStore txn "docs")
         req   (.delete store id)]
-    (set! (.-onsuccess req) (fn [_] (put! ch true) (close! ch)))
-    (set! (.-onerror req) (fn [e] (js/console.error "IDB delete error:" e) (close! ch)))
+    (set! (.-onsuccess req) (fn [_] (put! ch true) (async/close! ch)))
+    (set! (.-onerror req) (fn [e] (js/console.error "IDB delete error:" e) (async/close! ch)))
     ch))
 
 ;; ---------------------------------------------------------------------------
@@ -197,8 +197,8 @@
       (fn [e]
         (let [result (.-result (.-target e))]
           (put! ch (when result (.-value result)))
-          (close! ch))))
-    (set! (.-onerror req) (fn [_] (close! ch)))
+          (async/close! ch))))
+    (set! (.-onerror req) (fn [_] (async/close! ch)))
     ch))
 
 (defn set-meta!
@@ -208,15 +208,15 @@
         txn   (tx db "meta" :readwrite)
         store (.objectStore txn "meta")
         req   (.put store #js {:key key :value value})]
-    (set! (.-onsuccess req) (fn [_] (put! ch true) (close! ch)))
-    (set! (.-onerror req) (fn [_] (close! ch)))
+    (set! (.-onsuccess req) (fn [_] (put! ch true) (async/close! ch)))
+    (set! (.-onerror req) (fn [_] (async/close! ch)))
     ch))
 
 ;; ---------------------------------------------------------------------------
 ;; Close
 ;; ---------------------------------------------------------------------------
 
-(defn close!
+(defn close-db!
   "Close the IDB connection."
   [db]
   (when db (.close db)))