feat(web): add interactive Angular web UI dashboard and execution visualizer

Introduces the full-featured, modern Angular 19 web dashboard for ARTEMIS.
Provides real-time multimodal agent stream visualization, live device feeds,
interactive step inspection, task queue management, and model telemetry.

Key Features & UI Architecture:
- Workspace & Layout:
  * Split-pane responsive layout with draggable resizer bar for execution stream and chat/task panel.
  * Standalone Angular components powered by Signals and reactive computed state.
- Real-Time Multimodal Agent Stream:
  * SSE connection (/api/stream/:session_id) for live streaming of thoughts, actions, and tool calls.
  * Hierarchical phase grouping (Planning -> Execution -> Verification -> Summary).
  * Interactive step viewer with before/after screenshot overlays, coordinate pins, bounding boxes, and OCR text highlights.
  * Live planning loader, error diagnostics banner, retry status indicator, and token usage metrics.
- Task Queue & Chat Interface:
  * Goal submission with instant dispatch to backend runner (/api/run).
  * Active task queue tracker (running, pending queue in FIFO order, completed/failed historical sessions).
  * Session switcher with model info badges and Markdown notes viewer (e.g. task_plan.md).
- Floating Video Player & Live Stream:
  * Draggable, floating video player overlay for reviewing session recordings and live device feeds (/api/stream/device-live).
  * Playback controls: play/pause, seek scrubber, speed multipliers (0.5x - 4.0x), looping, and theater mode.
- Formatting & Parsing Utilities:
  * Android UI action formatter (tap, type, swipe, drag, keyevent, app launch).
  * Tool call formatter for ADB commands, note management, video inspection, and failure recovery.
  * Markdown parsing and milestone checklist rendering.

tsconfig.spec.json

@@ -0,0 +1,15 @@
+/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
+/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./out-tsc/spec",
+    "types": [
+      "jasmine"
+    ]
+  },
+  "include": [
+    "src/**/*.spec.ts",
+    "src/**/*.d.ts"
+  ]
+}