fix(tokens): animate market cap period changes and reset the period on each open

[bmc08gt]

Four market cap chart bugs in the currency-info overlay:

• Switching periods no longer animated. The overlay passes animateChartOpen = false to skip the draw-in, and that set Vico's animationSpec to null. animationSpec also drives the transition between datasets. The flag now controls initialAnimationSpec (first draw only), and animationSpec stays at tween(300).
• The period didn't reset between opens. The overlay reuses one TokenInfoViewModel across opens, so selectedPeriod persisted. OnMintProvided gained resetChartPeriod, which the overlay sets on each open.
• A mint with the same market cap as the previous one didn't load its chart. The history load hangs off two distinctUntilChanged calls keyed on the market cap alone, so the reused VM skipped it until Retry or a period change. Both now key on the mint too.
• The line changed color before the new data drew. The trend was derived from the incoming data during composition, while Vico builds the model off the main thread and starts the morph when runTransaction returns. Switching ALL to 1W on the emulator showed the old all-time line in red for about 450 ms. The trend is now set after runTransaction returns, and the line, area and marker colors fade over the same 300 ms as the curve. They're read at draw time, so the chart isn't rebuilt per frame; Vico's AreaFill.single and its indicator cache take fixed colors, so this adds VerticalGradientAreaFill and ColorProviderComponent. A recording of the same switch shows the old line staying green until the morph starts, then fading through to red with it.

Notes on the second fix:

• The pushed TokenInfoScreen leaves resetChartPeriod off. It re-dispatches OnMintProvided from LaunchedEffect(Unit) when a screen pushed over it pops (e.g. Swap), and a reset there would throw away the period the user picked.
• historicalMarketCapData is keyed by period only, so opening a different mint now clears it rather than briefly showing the previous mint's chart.
• The period-selection flow dropped distinctUntilChanged. Once the state resets to All, it would swallow re-picking the period from the previous open. The tab row ignores taps on the already-selected period instead, so there's no reload on a redundant tap.

New reducer tests in TokenInfoViewModelStateTest cover the reset, the default of keeping the period, and keeping versus clearing chart data by mint. TokenInfoViewModelChartLoadTest opens two mints with the same market cap on one VM and checks both load history; it failed on the second mint before the fix.