refactor(ts): Convert internal window dependencies to ES modules

Phase 1 of ESBuild migration: Convert 193+ internal window reads
to proper ES module imports across consumer modules.

Replaced window global pattern with direct function imports:
- (window as any).showToast → import { showToast } → showToast(msg, "type")
- (window as any).api.post → import { apiPost } → apiPost(url, data)
- (window as any).dom.getElementById → import { getElementById }

Modules migrated:
- admin.ts: Convert 14 showToast window reads
- analytics.ts: Add ES export (no window reads)
- conflicts.ts: Convert 6 showToast window reads
- custom-section-builder.ts: Convert api.post reads, add ES exports
- dashboard.ts: Convert 10 window reads (api, showToast)
- device-management.ts: Convert 4 showToast window reads, add Alpine registration
- linking.ts: Convert showToast window reads
- queue.ts: Convert 8 showToast window reads

Additionally added Alpine.js registration for templates:
- device-management.ts: Register copyToClipboard, regenerateDeviceToken

Benefits:
- Type-safe imports with build-time validation
- No runtime checks needed (ES modules guarantee existence)
- Clear dependency chains via explicit imports
- Eliminates 193+ window global reads

Pattern now: Import at top, direct function calls, Alpine registration
at bottom for template access.

Migration progress: Phase 1 complete
Next: Phase 2 (Alpine registration for remaining modules)

web/src/dashboard.ts

@@ -1,3 +1,6 @@
+import { apiPost, apiPut } from "./api";
+import { showToast } from "./toast";
+
 // Dashboard functionality with unified collections architecture
 // Procedural/imperative style (no OOP)
 
@@ -19,7 +22,7 @@ async function openDashboardSettings(): Promise<void> {
   ) as HTMLSelectElement;
   const libraryId = librarySelect?.value;
   if (!libraryId) {
-    (window as any).showToast.error("No library selected");
+    showToast("No library selected", "error");
     return;
   }
 
@@ -34,7 +37,7 @@ async function openDashboardSettings(): Promise<void> {
     const prefs = await response.json();
     applyPreferencesToModal(prefs);
   } else {
-    (window as any).showToast.error("Failed to load library preferences");
+    showToast("Failed to load library preferences", "error");
     console.error("API Error:", response.status, response.statusText);
     return; // Don't open modal with stale data.
   }
@@ -125,20 +128,18 @@ async function saveDashboardSettings(): Promise<void> {
       "library-select",
     ) as HTMLSelectElement;
     const libraryId = librarySelect?.value || "";
-    const response = await (window as any).api.put("/dashboard/preferences", {
+    const response = await apiPut("/dashboard/preferences", {
       library_id: libraryId,
       hidden_collections: hiddenCollections,
       collection_order: collectionOrder,
       items_per_section: parseInt(itemsPerCollection),
     });
     if (response.ok) {
-      (window as any).showToast.success("Dashboard settings saved");
+      showToast("Dashboard settings saved", "success");
       closeDashboardSettings();
       // Fetch updated sections and re-render (like switchLibrary does)
       if (!libraryId) {
-        (window as any).showToast.error(
-          "Unable to refresh dashboard - no library selected",
-        );
+        showToast("Unable to refresh dashboard - no library selected", "error");
         return;
       }
       const sectionResponse = await fetch(
@@ -155,11 +156,11 @@ async function saveDashboardSettings(): Promise<void> {
         renderDashboardCollections(data.sections);
         localStorage.setItem("selectedLibraryId", libraryId);
       } else {
-        (window as any).showToast.error("Failed to refresh sections");
+        showToast("Failed to refresh sections", "error");
       }
     }
   } catch (error) {
-    (window as any).showToast.error("Failed to save settings");
+    showToast("Failed to save settings", "error");
     console.error("Save dashboard settings error:", error);
   }
 }
@@ -176,21 +177,16 @@ async function restoreSystemCollection(
   }
 
   try {
-    const response = await (window as any).api.post(
-      "/dashboard/restore-system-collection",
-      {
-        collection_name: collectionName,
-      },
-    );
+    const response = await apiPost("/dashboard/restore-system-collection", {
+      collection_name: collectionName,
+    });
 
     if (response.ok) {
-      (window as any).showToast.success(
-        `"${collectionTitle}" restored to defaults`,
-      );
+      showToast(`"${collectionTitle}" restored to defaults`, "success");
       setTimeout(() => window.location.reload(), 1000);
     }
   } catch (error) {
-    (window as any).showToast.error("Failed to restore system collection");
+    showToast("Failed to restore system collection", "error");
     console.error("Restore system collection error:", error);
   }
 }
@@ -232,7 +228,7 @@ async function switchLibrary(libraryId: string): Promise<void> {
     renderDashboardCollections(data.sections);
     localStorage.setItem("selectedLibrary", libraryId);
   } catch (error) {
-    (window as any).showToast.error("Failed to load library");
+    showToast("Failed to load library", "error");
     console.error("Switch library error:", error);
   } finally {
     loading.classList.add("hidden");
@@ -366,7 +362,7 @@ async function reloadPage(): Promise<void> {
   const currentLibraryId = librarySelect?.value;
 
   if (!currentLibraryId) {
-    (window as any).showToast.error("No library selected");
+    showToast("No library selected", "error");
     return;
   }