chore(deps): automated bump for main

[ericfitz-deps-bot]

Automated dependency bump for main (safe patch/minor only).

Generated by the deps:bump skill running headless in CI. Review before merging.

Skill output / manual-review plan

Commit made: `f6d3f4a0`.

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## Manual Review Plan

### Priority 1: Ecosystem-Coordinated Update — Angular v21 → v22

These must all be updated together using `ng update`:

| Package | Current | Latest |
|---------|---------|--------|
| `@angular/core` | 21.2.17 | 22.0.4 |
| `@angular/animations` | 21.2.17 | 22.0.4 (deprecated!) |
| `@angular/cdk` | 21.2.14 | 22.0.2 |
| `@angular/cli` | 21.2.16 | 22.0.4 |
| `@angular/common` | 21.2.17 | 22.0.4 |
| `@angular/compiler` | 21.2.17 | 22.0.4 |
| `@angular/compiler-cli` | 21.2.17 | 22.0.4 |
| `@angular/forms` | 21.2.17 | 22.0.4 |
| `@angular/material` | 21.2.14 | 22.0.2 |
| `@angular/platform-browser` | 21.2.17 | 22.0.4 |
| `@angular/platform-browser-dynamic` | 21.2.17 | 22.0.4 (deprecated!) |
| `@angular/router` | 21.2.17 | 22.0.4 |
| `@angular-devkit/build-angular` | 21.2.16 | 22.0.4 (deprecated!) |
| `@angular-eslint/builder` | 21.4.0 | 22.0.0 |
| `@angular-eslint/eslint-plugin` | 21.4.0 | 22.0.0 |
| `@angular-eslint/eslint-plugin-template` | 21.4.0 | 22.0.0 |
| `@angular-eslint/schematics` | 21.4.0 | 22.0.0 |
| `@angular-eslint/template-parser` | 21.4.0 | 22.0.0 |
| `angular-eslint` | 21.4.0 | 22.0.0 |
| `ngx-markdown` | 21.3.0 | 22.0.0 |

**Recommendation:** Use `ng update @angular/core @angular/cli @angular/material angular-eslint` on a feature branch. Review https://angular.dev/update-guide (v21 → v22). Note that `@angular/animations` and `@angular/platform-browser-dynamic` are marked as deprecated — check if usage can be removed as part of the upgrade. `@angular-devkit/build-angular` is also deprecated; v22 may use a different builder.

### Priority 2: Major Version Updates (independent)

| Package | Current | Latest | Notes |
|---------|---------|--------|-------|
| `typescript` | 5.9.3 | 6.0.3 | Major — test ecosystem compatibility first |
| `@types/node` | 25.9.4 | 26.0.1 | Major — may need Node.js 26 environment |

**Recommendation:** Update `typescript` after confirming Angular v22 supports TS 6. Update `@types/node` to match Node.js 26 runtime if/when upgraded.

### Priority 3: Held / Pinned

| Package | Current | Latest | Reason |
|---------|---------|--------|-------|
| `@antv/x6` | 2.19.2 | 3.1.7 | Pinned in `package.json` comments: "v3.x has breaking changes requiring significant refactoring" |
| `@antv/x6-plugin-clipboard` | 2.1.6 | 3.0.0 | Tied to @antv/x6 major; deprecated at v2 |

**Recommendation:** Defer until a dedicated DFD refactoring sprint is planned.