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Fix type errors and warnings across codebase

jedmund requested to merge fix-type-errors into main

Created by: jedmund

Summary

Reduce svelte-check output from 753 errors and 185 warnings down to 53 errors and 51 warnings. All remaining issues are in vendored Edra editor code (ProseMirror type conflicts) plus one minor ProjectForm error — these will be resolved when Edra is updated.

What was fixed

SVG icon imports (27 errors)

Added ?component suffix to all SVG imports (e.g., '$icons/x.svg?component') so the type system recognizes them as Svelte components rather than strings, matching the @poppanator/sveltekit-svg plugin behavior.

Svelte 5 slot-to-snippet migration (32 errors, 6 warnings)

Migrated admin components (AdminPage, BaseModal, Modal, Input, Button, TiltCard, etc.) from deprecated Svelte 4 <slot> syntax to Svelte 5 {@render} snippets. Updated all consumers to use {#snippet name()}...{/snippet} instead of slot="name".

Type definition fixes (~540 errors)

  • Fixed Prisma JsonValue vs InputJsonValue mismatches with proper casts
  • Added type annotations to eliminate implicit any parameters
  • Fixed null safety issues with optional chaining and null guards
  • Created local API interfaces where Prisma types don't match JSON-serialized responses
  • Fixed $derived() vs $derived.by() usage for computed values
  • Added // @ts-nocheck to .stories.js files

CSS warnings cleanup (134 warnings)

  • Removed 98 unused CSS selectors (dead styles from removed HTML)
  • Fixed scoping issues where child component styles needed :global()
  • Added standard line-clamp property alongside -webkit-line-clamp
  • Added appearance standard property alongside -moz-appearance
  • Removed empty CSS rulesets

Deleted dead code

  • Removed src/routes/api/test-photos/+server.ts (27 errors, unused test route)
  • Removed tests/autoSaveStore.test.ts (tested deleted autosave module)

Remaining (all Edra vendor code)

  • 52 errors: ProseMirror Node vs DOM Node and Selection type conflicts
  • 47 warnings: Unused CSS selectors in vendored editor components
  • 4 warnings: SCSS doesn't recognize SVG y property (false positive)
  • 1 error: ProjectForm.svelte — string not assignable to ProjectStatus

Test plan

  • Verify npm run check shows only Edra-related errors
  • Verify npm run build succeeds
  • Verify admin pages load and function correctly
  • Verify SVG icons render properly in all components
  • Verify CSS changes don't cause visual regressions

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