FRE-592: Implement character database and relationship mapping

Add full character management system with enriched profiles (bio, traits,
arcs, motivation, conflict, secrets), relationship mapping between
characters with types and strength, character search/filter by role and
arc type, and character statistics (scene count, dialogue, screen time).

Includes database schema, tRPC router procedures, SolidJS components,
API hooks, and unit tests.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/db/schema/characters.ts

@@ -0,0 +1,49 @@
+import { sqliteTable, text, integer } from "drizzle-orm/sqlite-core";
+import { scripts } from "./scripts";
+
+export const characters = sqliteTable("characters", {
+  id: integer("id").primaryKey({ autoIncrement: true }),
+  scriptId: integer("script_id")
+    .notNull()
+    .references(() => scripts.id),
+  name: text("name").notNull(),
+  slug: text("slug").notNull(),
+  role: text("role", { enum: ["protagonist", "antagonist", "supporting", "background", "ensemble"] }).notNull().default("supporting"),
+  bio: text("bio"),
+  description: text("description"),
+  arc: text("arc"),
+  arcType: text("arc_type", { enum: ["positive", "negative", "flat", "complex"] }),
+  age: integer("age"),
+  gender: text("gender"),
+  voice: text("voice"),
+  traits: text("traits"),
+  motivation: text("motivation"),
+  conflict: text("conflict"),
+  secret: text("secret"),
+  imageUrl: text("image_url"),
+  createdAt: integer("created_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+  updatedAt: integer("updated_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+});
+
+export const characterRelationships = sqliteTable("character_relationships", {
+  id: integer("id").primaryKey({ autoIncrement: true }),
+  characterIdA: integer("character_a_id")
+    .notNull()
+    .references(() => characters.id),
+  characterIdB: integer("character_b_id")
+    .notNull()
+    .references(() => characters.id),
+  relationshipType: text("relationship_type", {
+    enum: ["family", "romantic", "friendship", "rivalry", "mentor", "alliance", "conflict", "professional", "other"],
+  }).notNull(),
+  description: text("description"),
+  strength: integer("strength").notNull().default(50),
+  isAntagonistic: integer("is_antagonistic", { mode: "boolean" }).notNull().default(false),
+  createdAt: integer("created_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+  updatedAt: integer("updated_at", { mode: "timestamp" }).$defaultFn(() => new Date()),
+});
+
+export type Character = typeof characters.$inferSelect;
+export type NewCharacter = typeof characters.$inferInsert;
+export type CharacterRelationship = typeof characterRelationships.$inferSelect;
+export type NewCharacterRelationship = typeof characterRelationships.$inferInsert;

src/db/schema/index.ts

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+export { users, type User, type NewUser } from "./users";
+export { projects, type Project, type NewProject } from "./projects";
+export { scripts, type Script, type NewScript } from "./scripts";
+export { characters, characterRelationships, type Character, type NewCharacter, type CharacterRelationship, type NewCharacterRelationship } from "./characters";
+export { scenes, sceneCharacters, type Scene, type NewScene, type SceneCharacter, type NewSceneCharacter } from "./scenes";
+export { revisions, revisionChanges, type Revision, type NewRevision, type RevisionChange, type NewRevisionChange } from "./revisions";