implement 2 methods and add more tests. bump to 0.7.8

[mordamax]

host-api-test-sdk 0.7.5

Full handler coverage

Two previously missing handlers are now implemented:

• handleCreateTransaction — product accounts can create transactions. The test host returns the call data as-is for assertions.
• handleAccountCreateProof — Ring VRF proof creation. The test host signs the message with the product account's sr25519 key as a stand-in for actual ring VRF.

The only remaining unimplemented handler is renderChatCustomMessage (custom chat renderer callback).

Comprehensive integration tests

12 new integration tests bring the total from 34 to 46, covering every major handler:

• Theme subscribe (host→product theme changes)
• Entropy derivation (deterministic, same-key-same-result)
• Login flow (authenticated, rejected, disconnect/reconnect)
• User identity (getUserId returns primaryUsername)
• Resource allocation (all 4 resource types allocated)
• Feature check (configured chain matches, unknown chain doesn't)
• Local storage (write, read, clear round-trip)
• Statement store proof creation
• Create transaction for product accounts
• Account create proof (Ring VRF)

Updated dependencies

@novasamatech/* → ^0.7.8.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​novasamatech/​host-container@​0.7.7 ⏵ 0.7.8	+1		+1	+1
	@​novasamatech/​product-sdk@​0.7.7 ⏵ 0.7.8	+1		+1	+1
	@​novasamatech/​host-api@​0.7.7 ⏵ 0.7.8				+1

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