app: Classes binder + Mind Dump — v0.5.0

Two new tabs in the Studio Notebook:

- 📚 Classes: a binder for courses, workshops, books, and video series.
  Each class has a subject, source, link, status (taking / want / done),
  a what-it's-about note, photos, handout files, and dated pages of
  class notes that can be edited in place.
- 💭 Mind Dump: idea capture filed by category (things to make — with a
  medium: clay / wood / silver / metal / mixed — marketing, packaging,
  display & booth, shop & site, other) with spark / trying / did it /
  parked status, sketch photos, one-tap 'make it a to-do', and filters.
  The Today jot box gains a 💭 idea chip; those land as 'unsorted' to
  file later.

Schema: Course, CoursePage, Idea (additive; prisma db push at boot).
Files tab now labels attachments that belong to a class.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

app/prisma/schema.prisma

@@ -167,3 +167,36 @@ model PriceEntry {
   note       String   @default("")
   created    DateTime @default(now())
 }
+
+// ── Classes binder — a course, workshop, book, or video series Bonna learns from
+model Course {
+  id      Int          @id @default(autoincrement())
+  title   String
+  subject String       @default("")       // methods · skills · marketing · business · glaze chemistry …
+  source  String       @default("")       // teacher / school / author / channel
+  url     String       @default("")
+  status  String       @default("taking") // taking · want · done
+  notes   String       @default("")
+  created DateTime     @default(now())
+  pages   CoursePage[]
+}
+
+model CoursePage {
+  id       Int      @id @default(autoincrement())
+  courseId Int
+  course   Course   @relation(fields: [courseId], references: [id], onDelete: Cascade)
+  title    String   @default("")
+  text     String
+  created  DateTime @default(now())
+  updated  DateTime @default(now())
+}
+
+// ── Mind dump — ideas, filed by category ("" = unsorted, from the Today jot box)
+model Idea {
+  id       Int      @id @default(autoincrement())
+  text     String
+  category String   @default("")      // make · marketing · packaging · display · shop · other
+  medium   String   @default("")      // for "make": clay · wood · silver · metal · mixed
+  status   String   @default("spark") // spark · trying · made · parked
+  created  DateTime @default(now())
+}