Fix: manual deployment bug

[HarshMN2345]

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Greptile Summary

This PR fixes a bug where $currentPlan.deploymentSize could be undefined even when $currentPlan itself was truthy, causing the file-size limit to incorrectly default to 0 bytes for cloud users. It also replaces hardcoded 'File size exceeds 10MB' error messages with a dynamic value derived from readableMaxSize, and restructures the paused-project modal footer to render an explicit mobile layout.

• Four deployment-upload files (create-function, createManual, create-site, createManualDeploymentModal) each gain the ?.deploymentSize optional-chaining guard and a dynamic error message built from humanFileSize.
• pausedProjectModal splits its footer into explicit {#if $isSmallViewport} / {:else} branches so buttons render full-width and stacked on mobile, preserving the existing behaviour where the Upgrade button is only shown on larger viewports.

Confidence Score: 5/5

Safe to merge — changes are narrowly scoped to fixing a falsy-deploymentSize guard, improving error messages, and improving mobile layout.

The optional-chaining fix is correct and targets a real edge case where a cloud plan object can exist without a deploymentSize field. The dynamic error message follows the existing readableMaxSize.value + readableMaxSize.unit pattern used throughout the codebase. The responsive layout refactor in pausedProjectModal preserves the pre-existing behaviour for the Upgrade button on mobile. No logic regressions were identified across the five changed files.

No files require special attention.

Important Files Changed

Filename	Overview
src/routes/(console)/project-[region]-[project]/functions/create-function/manual/+page.svelte	Adds ?.deploymentSize optional chaining so a plan without a deploymentSize field correctly falls back to the regional limit; replaces hardcoded "10MB" error message with the dynamic readable size.
src/routes/(console)/project-[region]-[project]/functions/function-[function]/(modals)/createManual.svelte	Same ?.deploymentSize fix and dynamic error message as the create-function page; comment removal is pure cleanup.
src/routes/(console)/project-[region]-[project]/sites/create-site/manual/+page.svelte	Applies the ?.deploymentSize optional-chaining fix and removes the stale "already in MB" comment; error message was already dynamic so no message change here.
src/routes/(console)/project-[region]-[project]/sites/site-[site]/deployments/createManualDeploymentModal.svelte	Same ?.deploymentSize fix and dynamic error message as the other deployment modals.
src/routes/(console)/project-[region]-[project]/pausedProjectModal.svelte	Restructures footer buttons to use a proper two-branch layout for small vs. large viewports; Upgrade button behaviour on mobile is unchanged from before (it was already hidden via {#if !$isSmallViewport}).

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