chore: refresh dependencies and compatibility

[Saluana]

Summary

Refreshes OR3 Chat's dependencies on top of the current or3-cloud branch and applies the small compatibility/test-harness changes needed to keep the upgraded toolchain green.

Dependency updates

Runtime highlights:

• @noble/hashes -> 2.4.0
• @nuxt/ui -> 4.11.1
• @openrouter/sdk -> 1.2.145
• @vueuse/core -> 14.4.0
• dexie -> 4.4.6
• dexie-export-import -> 4.4.1
• nuxt -> 4.5.2
• reka-ui -> 2.10.4
• vue -> 3.5.43
• vue-router -> 5.3.1
• zod -> 4.6.5
• lockfile refresh also resolves Orama to 3.1.18 and Tiptap packages to 3.31.3 within existing manifest ranges.

Development/tooling highlights:

• Playwright -> 1.63.0
• Vite -> 8.3.0
• Vitest / coverage-v8 -> 4.1.11
• vue-tsc -> 3.3.11
• @vitejs/plugin-vue -> 6.0.9
• Convex -> 1.46.0
• ESLint -> 9.39.5
• tsx -> 4.23.13
• Node types remain on the Node 24 line and move to 24.13.5.

Compatibility migrations

• Updated vitest.config.ts to use native ESM import.meta.dirname instead of the legacy __dirname pattern. This removes Vite 8.3's native config-loader compatibility warning and matches the repo's Node >=24 / ESM baseline.
• Isolated SystemPromptsModal.test.ts from Reka UI dialog internals by stubbing the dialog primitives and related auto-components. The failure reproduced on the untouched baseline dependency set, so this is existing test-harness debt exposed by verification rather than an application regression from the upgrades.
• No production API or application behavior change is intended.

Verification

Passed on the upgraded dependency set:

• bun install --frozen-lockfile
• bun run type-check
• bun run test - 1852 tests passed
• bun run test:cloud:provider-compatibility
• bun run build

Lint was also run. bun run lint currently reports 287 existing problems (11 errors, 276 warnings). The untouched or3-cloud baseline reports the exact same counts, so this PR does not introduce new lint debt and does not broaden scope to unrelated cleanup.

Deferred major migrations

• TypeScript remains on ^5.9.3; the TypeScript 6/7 compiler transition is intentionally deferred to a dedicated migration.
• @typescript-eslint remains on its current major line for the same reason.
• fake-indexeddb and jsdom remain on their current major lines because moving them is not necessary for this dependency refresh and would add unrelated test-environment migration risk.

This PR is intentionally left open and is not merged.

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