Add version number from package.json to footer — match Dropcast pattern

[realproject7]

Summary

Track app version in package.json and display it in the footer, matching Dropcast's pattern.

Implementation

• Import `package.json` in the footer component: `import packageJson from '@/package.json'`
• Display `v{packageJson.version}` in the footer
• Set initial version to `0.1.0`

Versioning Rules (for all agents)

• 3rd digit (patch): bump for minor updates, bug fixes — T3 can bump autonomously
• 2nd digit (minor): bump for feature additions, major updates — requires operator (T1) permission
• 1st digit (major): bump for pivot-level changes — requires operator (T1) permission

Acceptance Criteria

• package.json version set to `0.1.0`
• Version displayed in footer
• Versioning rules documented in CLAUDE.md or project rules