feat: app icon/splash asset guidelines + app.json config (FIBEROPS-209)

- Fix slug typo: "firberops" → "fiberops"
- Update splash backgroundColor to brand #F8FAFC (was Expo default #2563EB)
- Update android adaptiveIcon backgroundColor to brand cyan #0891B2
- Add assets/ASSETS.md with full brand guidelines (colors, fonts, dimensions)
- Add scripts/generate-assets.sh to regenerate PNGs from SVG sources via inkscape/rsvg-convert

assets/ASSETS.md

@@ -0,0 +1,87 @@
+# FiberOps Mobile — Asset Guidelines
+
+> The files in this directory are currently **placeholder** Expo defaults.
+> Replace them with brand-correct assets using the specs below.
+> Run `scripts/generate-assets.sh` to regenerate from SVG sources once installed.
+
+---
+
+## Brand Colors
+
+| Token | Hex | Usage |
+|-------|-----|-------|
+| Primary cyan | `#0891B2` | App icon background, adaptive icon background, tint color |
+| Splash background | `#F8FAFC` | Splash screen background (near-white) |
+| Text on cyan | `#FFFFFF` | "FO" / "FiberOps" text on colored backgrounds |
+| Text on light | `#0891B2` | "FiberOps" wordmark on splash |
+
+## Brand Font
+
+**Fira Sans** (Bold / SemiBold) — preferred for the "FO" monogram and "FiberOps" wordmark.
+Fallback: Inter, SF Pro, or any geometric sans-serif.
+
+---
+
+## Asset Inventory
+
+### `icon.png` — App Icon
+- **Dimensions:** 1024 × 1024 px
+- **Format:** PNG, no transparency
+- **Design:** Solid `#0891B2` background with rounded corners (corner radius ~22.5 % of width ≈ 230 px), centered white "FO" wordmark in Fira Sans Bold at ~460 px.
+- **Used by:** iOS home screen, App Store listing, Expo Go thumbnail.
+
+### `adaptive-icon.png` — Android Adaptive Icon Foreground
+- **Dimensions:** 1024 × 1024 px
+- **Format:** PNG with **transparent** background
+- **Design:** Centered white "FO" wordmark (same as icon, no background fill). Android clips to a circle/squircle and composites over `backgroundColor` (`#0891B2`).
+- **Safe zone:** Keep visual content within the inner 66 % (≈ 672 px) to avoid clipping on all Android shapes.
+
+### `android-icon-background.png`
+- **Dimensions:** 1024 × 1024 px
+- **Format:** PNG
+- **Design:** Solid `#0891B2` fill — no other content.
+
+### `android-icon-foreground.png`
+- **Dimensions:** 1024 × 1024 px
+- **Format:** PNG with transparent background
+- **Design:** Same as `adaptive-icon.png`.
+
+### `android-icon-monochrome.png`
+- **Dimensions:** 1024 × 1024 px
+- **Format:** PNG, single-channel (white on transparent or black on transparent)
+- **Design:** Outline / solid "FO" mark only — no color fill. Used by Android 13+ themed icons.
+
+### `splash-icon.png` — Splash Screen Logo
+- **Dimensions:** 1284 × 2778 px (iPhone 14 Pro Max native) or at minimum 1024 × 1024 px centered mark
+- **Format:** PNG with transparent background (Expo composites over `backgroundColor`)
+- **Design:** Centered "FO" logomark (200–300 px) above "FiberOps" wordmark in `#0891B2`. Background is handled by `app.json` → `splash.backgroundColor` (`#F8FAFC`).
+- **Resize mode:** `contain` (set in app.json) — keep content in the center 40 % of canvas.
+
+### `favicon.png` — Web Favicon
+- **Dimensions:** 48 × 48 px (also works at 32 × 32 and 16 × 16)
+- **Format:** PNG
+- **Design:** `#0891B2` square background with white "F" or "FO" mark.
+
+---
+
+## Generating Assets
+
+See `../scripts/generate-assets.sh` for the full generation pipeline using Inkscape or rsvg-convert.
+
+Quick summary:
+1. Edit `scripts/fiberops-icon.svg` (source of truth)
+2. Run `scripts/generate-assets.sh`
+3. All PNG files in `assets/` are overwritten with fresh exports
+
+---
+
+## app.json Reference
+
+| Key | Value |
+|-----|-------|
+| `expo.icon` | `./assets/icon.png` |
+| `expo.splash.image` | `./assets/splash-icon.png` |
+| `expo.splash.backgroundColor` | `#F8FAFC` |
+| `expo.android.adaptiveIcon.foregroundImage` | `./assets/adaptive-icon.png` |
+| `expo.android.adaptiveIcon.backgroundColor` | `#0891B2` |
+| `expo.web.favicon` | `./assets/favicon.png` |