migration: establish exact preserved app baseline

app/static/pages/auction/page.js

@@ -0,0 +1,4 @@
+window.XiaobaiPageModules.register("auction", ["auctionView"], {
+  enter: ["loadAuction"],
+  leave: ["clearAuction"],
+});

app/static/pages/dragon-tiger/page.js

@@ -0,0 +1,3 @@
+window.XiaobaiPageModules.register("dragon_tiger", ["dragonView"], {
+  enter: ["loadDragonTiger"],
+});

app/static/pages/heaven/page.js

@@ -0,0 +1,4 @@
+window.XiaobaiPageModules.register("heaven", ["heavenView"], {
+  enter: ["loadHeaven"],
+  leave: ["stopHeaven"],
+});

app/static/pages/ladder/page.js

@@ -0,0 +1 @@
+window.XiaobaiPageModules.register("ladder", ["ladderView"]);

app/static/pages/mentor/page.js

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+window.XiaobaiPageModules.register("mentor", ["mentorView"], {
+  enter: ["loadMentor"],
+});

app/static/pages/pools/page.js

@@ -0,0 +1,7 @@
+window.XiaobaiPageModules.register("pools", [
+  "limitPool",
+  "brokenView",
+  "downView",
+  "yesterdayView",
+  "performanceView",
+]);

app/static/pages/popularity/page.js

@@ -0,0 +1,3 @@
+window.XiaobaiPageModules.register("popularity", ["popularityView"], {
+  enter: ["loadPopularity"],
+});

app/static/pages/review/page.js

@@ -0,0 +1,3 @@
+window.XiaobaiPageModules.register("review", ["reviewWorkspaceView"], {
+  enter: ["loadReview"],
+});

app/static/pages/rotation/page.js

@@ -0,0 +1,3 @@
+window.XiaobaiPageModules.register("rotation", ["rotationView"], {
+  enter: ["loadRotation"],
+});

app/static/pages/runtime.js

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+(function exposePageModuleRuntime(global) {
+  "use strict";
+
+  const definitions = new Map();
+  let sealed = false;
+
+  function register(feature, viewIds, lifecycle = {}) {
+    if (sealed) throw new Error("Page module registry is already sealed");
+    if (!feature || !Array.isArray(viewIds) || !viewIds.length) {
+      throw new Error("Page modules require a feature and at least one view ID");
+    }
+    viewIds.forEach((viewId) => {
+      if (definitions.has(viewId)) throw new Error(`Duplicate page module: ${viewId}`);
+      definitions.set(viewId, Object.freeze({
+        feature,
+        viewId,
+        enter: Object.freeze([...(lifecycle.enter || [])]),
+        leave: Object.freeze([...(lifecycle.leave || [])]),
+      }));
+    });
+  }
+
+  function create(options) {
+    sealed = true;
+    const pages = options.pages;
+    const actions = Object.freeze({ ...(options.actions || {}) });
+    const missing = pages.all.filter((page) => !definitions.has(page.id)).map((page) => page.id);
+    if (missing.length) throw new Error(`Missing page modules: ${missing.join(", ")}`);
+
+    function run(actionNames, context) {
+      actionNames.forEach((actionName) => {
+        const action = actions[actionName];
+        if (typeof action !== "function") throw new Error(`Unknown page action: ${actionName}`);
+        action(context);
+      });
+    }
+
+    function beforeMount(viewId, previousView) {
+      actions.closeTransientUi?.({ viewId, previousView });
+      if (previousView && previousView !== viewId) {
+        run(definitions.get(previousView)?.leave || [], { viewId, previousView });
+      }
+    }
+
+    function afterMount(viewId, previousView) {
+      const context = { viewId, previousView };
+      actions.applyAccess?.(context);
+      run(definitions.get(viewId)?.enter || [], context);
+    }
+
+    return Object.freeze({
+      afterMount,
+      beforeMount,
+      get: (viewId) => definitions.get(viewId) || null,
+      has: (viewId) => definitions.has(viewId),
+    });
+  }
+
+  global.XiaobaiPageModules = Object.freeze({ create, register });
+})(window);

app/static/pages/screener/page.js

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+window.XiaobaiPageModules.register("screener", ["screenerView"], {
+  enter: ["loadScreener"],
+});
+
+window.XiaobaiPageModules.register("screener", ["screenerTrackingView"]);

app/static/pages/sentiment/page.js

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+window.XiaobaiPageModules.register("sentiment", ["sentimentCycleView"], {
+  enter: ["loadSentiment"],
+});

app/static/pages/themes/page.js

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+window.XiaobaiPageModules.register("themes", ["themeLibraryView"], {
+  enter: ["loadThemes"],
+});