Implement major visual overhaul and brand identity transition to "Aubergine Nocturne" style across all screens.

### Design & Theming
- Implement a fixed dark editorial theme with a palette of deep aubergine, warm copper (Accent), and cream (Text) using OKLCH-to-sRGB color tokens.
- Integrate premium typography using Google Fonts:
    - **Cormorant Garamond:** Editorial display serif for headlines and status labels.
    - **Instrument Sans:** Clean UI sans for body text and actions.
    - **JetBrains Mono:** Monospaced typeface for dates, counters, and ledger-style labels.
- Replace standard Material3 components with custom "Aubergine" styled components (cards, chips, and dividers).

### Calendar & Insights
- Redesign the Calendar grid with refined "bubble" day cells, high-contrast period indicators, and a horizontal "Today" footer.
- Add a new `PhaseArc` visualization in Cycle Insights to show the current phase progress within the overall cycle length.
- Enhance `CycleHistoryChart` with dashed average lines and active-state highlighting for the latest cycle.
- Refine the cycle status banner with a pulsing `GlowDot` and detailed phase descriptions.

### Day Detail & Health Trends
- Reorganize Day Detail into numbered sections (Cycle, Symptoms, Notes, Intimacy).
- Redesign the symptom logging interface with expanded category drawers and custom rating boxes.
- Transform Health Trends with a sparkline-based condition frequency view and a mono-styled range selector.
- Update `AddIntimacyForm` to follow the new typography and color scheme within its modal bottom sheet.

### Onboarding & Settings
- Rewrite the Onboarding flow to feature an editorial "Welcome" step with a monogram header and private-ledger tagline.
- Overhaul Settings with custom toggle tabs for preferences and a redesigned profile management card.

### Domain & Logic
- Update `CyclePredictionEngine` to include logic for `avgPeriodLength` and a more precise phase mapping algorithm that eliminates gaps between cycle windows.
- Refine `CycleRepository` to set `cycleLength` only when a new cycle starts, rather than at period end, to ensure accurate start-to-next-start calculations.
- Add `ui-text-google-fonts` dependency to support the new typeface requirements.

Signed-off-by: whitlocktech <whitlocktech@gmail.com>

app/build.gradle.kts

@@ -59,6 +59,7 @@ dependencies {
     implementation(libs.compose.ui.tooling.preview)
     implementation(libs.compose.material3)
     implementation(libs.compose.material.icons.extended)
+    implementation(libs.compose.ui.text.google.fonts)
     implementation(libs.lifecycle.runtime.ktx)
     implementation(libs.lifecycle.viewmodel.compose)
     implementation(libs.lifecycle.runtime.compose)