Update docs and formatting; remove obsolete v2 schema doc

- Refresh AI guide docs (api, svelte-patterns, testing-patterns)
- Add API updates notes, drop the outdated portal_api_v2_schema.md
- Format package.json

AGENTS.md

@@ -97,9 +97,9 @@ Use narrower commands when appropriate.
 
 If validation fails:
 
-* Diagnose the failure.
-* Fix the issue.
-* Run validation again.
+- Diagnose the failure.
+- Fix the issue.
+- Run validation again.
 
 Never finish with known failures.
 
@@ -113,15 +113,15 @@ portal.Rhemawavetech.com
 
 Stack:
 
-* SvelteKit 2
-* Svelte 5
-* TypeScript
-* Tailwind CSS v4
-* Prisma 7
-* PostgreSQL
-* Better Auth
-* Vitest
-* Playwright
+- SvelteKit 2
+- Svelte 5
+- TypeScript
+- Tailwind CSS v4
+- Prisma 7
+- PostgreSQL
+- Better Auth
+- Vitest
+- Playwright
 
 Package manager:
 
@@ -266,9 +266,9 @@ AdminPage.svelte
 
 Registry metadata exists for:
 
-* columns
-* searches
-* relations
+- columns
+- searches
+- relations
 
 Forms are manually implemented per route.
 
@@ -309,8 +309,8 @@ Only load that file when modifying Svelte components or Svelte logic.
 
 Testing uses:
 
-* Vitest
-* Playwright browser testing
+- Vitest
+- Playwright browser testing
 
 For testing patterns, read:
 
@@ -338,10 +338,10 @@ Only load that file when working on API functionality.
 
 Prettier rules:
 
-* tabs
-* single quotes
-* no trailing commas
-* 80 character print width
+- tabs
+- single quotes
+- no trailing commas
+- 80 character print width
 
 Follow existing formatting.
 
@@ -391,17 +391,14 @@ Confirm:
 2. Relevant tests/checks were run.
 3. Failures were fixed.
 4. The final response explains:
-
-   * what changed
-   * files modified
-   * verification performed
+   - what changed
+   - files modified
+   - verification performed
 
 Do not stop at:
 
-* "I found the issue"
-* "Here is a plan"
-* "The next step would be"
+- "I found the issue"
+- "Here is a plan"
+- "The next step would be"
 
 Finish the work.
-
-