harden storage getStore for browser runtimes and filter null keys

Author: maycon-mello

CLAUDE.md

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+1. Think Before Coding
+Don't assume. Don't hide confusion. Surface tradeoffs.
+
+Before implementing:
+
+State your assumptions explicitly. If uncertain, ask.
+If multiple interpretations exist, present them - don't pick silently.
+If a simpler approach exists, say so. Push back when warranted.
+If something is unclear, stop. Name what's confusing. Ask.
+2. Simplicity First
+Minimum code that solves the problem. Nothing speculative.
+
+No features beyond what was asked.
+No abstractions for single-use code.
+No "flexibility" or "configurability" that wasn't requested.
+No error handling for impossible scenarios.
+If you write 200 lines and it could be 50, rewrite it.
+Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.
+
+3. Surgical Changes
+Touch only what you must. Clean up only your own mess.
+
+When editing existing code:
+
+Don't "improve" adjacent code, comments, or formatting.
+Don't refactor things that aren't broken.
+Match existing style, even if you'd do it differently.
+If you notice unrelated dead code, mention it - don't delete it.
+When your changes create orphans:
+
+Remove imports/variables/functions that YOUR changes made unused.
+Don't remove pre-existing dead code unless asked.
+The test: Every changed line should trace directly to the user's request.
+
+4. Goal-Driven Execution
+Define success criteria. Loop until verified.
+
+Transform tasks into verifiable goals:
+
+"Add validation" → "Write tests for invalid inputs, then make them pass"
+"Fix the bug" → "Write a test that reproduces it, then make it pass"
+"Refactor X" → "Ensure tests pass before and after"
+For multi-step tasks, state a brief plan:
+
+1. [Step] → verify: [check]
+2. [Step] → verify: [check]
+3. [Step] → verify: [check]
+Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.
+
+# env variables 
+export EDV_AUTH_KEY=DOCKWALLET-TEST
+export EDV_URL=https://edv.truvera.io
+export PROOF_TEMPLATE_FOR_ANY_CREDENTIAL=61146961-e1b2-4c08-bbc9-2bc9fd815575
+export CERTS_API_KEY=eyJzY29wZXMiOlsidGVzdCIsImFsbCJdLCJzdWIiOiI3Iiwic2VsZWN0ZWRUZWFtSWQiOiI4IiwiY3JlYXRvcklkIjoiNyIsImlhdCI6MTY5ODg1MzI0MiwiZXhwIjo0Nzc4MTQ5MjQyfQ.njdeY1QzgBP9alG2wWjr_8tpEGnMpa2baEPVhtjKYiZTHYe_FnBKVu7jksk-eoIOYqD41MtOP9mjn9cG9Ure2A
+export TESTING_API_URL=https://api-staging.truvera.io
+
+# nodejs version
+nvm use 24
+
+# running integration tests
+npm run test:integration integration-tests/verification-flow/range-proofs.test.ts
+
+# runing unit tests
+npm run test