fix(Capacitor): format capacitance using formatSiUnit to match Resistor and Inductor

[KrishnaX12]

Description

This PR updates Capacitor._getSchematicSymbolDisplayValue() to format invalid or unparseable capacitance values using formatSiUnit(this._parsedProps.capacitance) + "F", aligning its error display behavior with <resistor /> (Resistor.ts) and <inductor /> (Inductor.ts). Valid string expressions (e.g., "10uF", "100nF") continue to be preserved as written to prevent unnecessary diffs in existing schematic renderings.

Issue Fixed

When an invalid or non-numeric string value such as capacitance="lijF" or capacitance="fh" was passed to <capacitor />, it previously rendered the raw unparseable string on the schematic symbol instead of NaNpF (unlike <resistor /> which displays NaNpΩ and <inductor /> which displays NaNpH).

With this change, all passive components now uniformly display standard NaNp... formatting (NaNpΩ, NaNpH, NaNpF) when given invalid input strings.

Verification & Screenshots

Tested locally via terminal symbol rendering and automated unit tests (tests/components/normal-components/capacitor-display-value.test.tsx).

Before (Without Fix):

After

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Project	Deployment	Actions	Updated (UTC)
tscircuit-core-benchmarks	Ready	Preview, Comment	Jul 26, 2026 1:25pm

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