0.8.3: custom tooltips, editor-hide, pack script, settings reshuffle

Tooltips
- New v-tooltip directive + TooltipHost floating panel replace the
  native title attribute across 95+ sites (topbar, timeline, sidebar,
  properties, stage overlays, fullscreen preview, export dialog,
  clipart drawer, modals). Styled dark card with a configurable
  label + optional help line for inline documentation; screen
  readers still get an aria-label when the panel is disabled.
- Settings → Interface toggle (`ruwio:tooltipsEnabled`) hides the
  visual panel for users who know the app. IconButton now routes
  its title prop through v-tooltip so every existing call site is
  tooltip-aware without churn.

Editor-hide + export filter
- New `Layer.editorHidden` flag, eye toggle per layer row, skipped
  by the Konva stage and the mask-preview canvas path but honoured
  by exports and fullscreen preview (runtime untouched).
- Export dialog gets a "Skip hidden tracks" switch that strips
  editor-hidden layers from every format (scene JS, runtime,
  example HTML, MP4, WebM) on opt-in. Disabled when the scene has
  no hidden layers.

Button editor
- `+` buttons appear on empty state slots in button-timeline rows
  and duplicate the nearest keyframe (prev by preference, next
  otherwise) onto that slot. New `duplicateKeyframeAt` store
  action carries props, easing, hold, and bezier handles across.

Stage / interaction
- Plain left-click on the empty content view pans the viewport,
  but only when the pointer isn't over a Konva shape — transformer
  handles, vertex dots, and selection boxes that extend past the
  canvas edge keep their drag.

Settings reshuffle
- Timeline tab merged into Document (Duration + FPS sit under a
  new "Timing" sub-heading). New Interface tab gathers three
  global prefs: Show tooltips, Show locked tracks, Asset
  thumbnails — driven by shared composables so the existing
  toolbar toggles stay in sync. Interface-tab CSS defensively
  resets the scoped label flex-column + uppercase rule that was
  making the toggle row look like an accident.

Project identity + UX polish
- Favicon wired up (moved to public/favicon.ico, linked from
  index.html); scripts/pack.sh packs the minimum Vue project
  (src, index.html, configs, public) into a tarball with the
  right version in the filename, and `npm run pack` drives it.
- About dialog now credits Torsten Hoeltge.

Test infra
- Progress bar turns red mid-run on the first failure: runAll
  gets an onResult callback that TestOverlay uses to push each
  result into the reactive array incrementally.
- mountComponent in the test harness registers v-tooltip on the
  isolated app instance so IconButton's aria-label contract
  actually fires under test.

Regression tests
- duplicateKeyframeAt: copy fidelity (props, easing, hold),
  collision refusal, unknown-id guards, separated-track targeting.
- Shared composables: useTooltipPref and useAssetThumbsPref both
  return the same ref across calls and persist to localStorage.
- Tooltip contract: IconButton ships `aria-label` (not title);
  live-DOM smoke tests match on aria-label selectors now.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/devtools/testRunner.ts

@@ -131,6 +131,7 @@ function cleanStack(stack: string | undefined): string | undefined {
 export interface RunOptions {
   onProgress?: (done: number, total: number) => void
   onTestStart?: (suite: string, name: string) => void
+  onResult?: (result: TestResult) => void
   interTestDelayMs?: number
 }
 
@@ -149,16 +150,17 @@ export async function runAll(
       opts.onTestStart?.(s.name, t.name)
       await new Promise((r) => requestAnimationFrame(() => r(null)))
       const start = performance.now()
+      let pushed: TestResult
       try {
         if (s.beforeEach) await s.beforeEach()
         await t.fn()
         if (s.afterEach) await s.afterEach()
-        results.push({
+        pushed = {
           suite: s.name,
           name: t.name,
           ok: true,
           durationMs: performance.now() - start,
-        })
+        }
       } catch (err) {
         try {
           if (s.afterEach) await s.afterEach()
@@ -166,15 +168,21 @@ export async function runAll(
           /* ignore cleanup errors if test already failed */
         }
         const e = err as Error
-        results.push({
+        pushed = {
           suite: s.name,
           name: t.name,
           ok: false,
           error: e.message || String(err),
           stack: cleanStack(e.stack),
           durationMs: performance.now() - start,
-        })
+        }
       }
+      results.push(pushed)
+      // Per-result callback fires before the progress tick so the UI
+      // can paint a failing-run indicator (e.g. flip the progress bar
+      // to red) the moment a test fails instead of only once runAll
+      // resolves.
+      opts.onResult?.(pushed)
       done++
       opts.onProgress?.(done, total)
       if (delay > 0) await new Promise((r) => setTimeout(r, delay))