feat: daily vani

internal/model/vani.go

@@ -0,0 +1,24 @@
+package model
+
+import "time"
+
+// VaniPayload is the prebuilt display blob for the "Vāṇī of the Day" CTA. It's
+// owned by the frontend's rendering needs and stored verbatim as JSONB, so the
+// home page can render without re-reading Mongo.
+type VaniPayload struct {
+	Kind      string `json:"kind"`                 // "verse" | "prose" | "transcript"
+	Label     string `json:"label"`                // "Verse" | "Chapter" | "Lecture" | "Conversation"
+	Title     string `json:"title"`                // reference / chapter title / lecture name
+	Subtitle  string `json:"subtitle"`             // short excerpt or date · place
+	Href      string `json:"href"`                 // in-app path to open the item
+	BookTitle string `json:"book_title,omitempty"` // e.g. "Bhagavad-gītā As It Is"
+}
+
+// VaniPick is one persisted day's choice. RefID is `<kind>:<mongo _id hex>` and
+// is what the 90-day no-repeat rule dedupes on.
+type VaniPick struct {
+	Day     time.Time
+	Kind    string
+	RefID   string
+	Payload VaniPayload
+}