Add a new "test-jazz-stream" task to flow.toml for testing live stream recording flow, including setup instructions and verification steps.

Update CommentBox component to handle image uploads with validation, preview, and progress tracking, and to manage comments with Jazz container initialization.

tests/README.md

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+# Jazz Live Stream Recording Test
+
+Tests the end-to-end flow of live stream recording with Jazz FileStream.
+
+## Prerequisites
+
+1. **Start Linsa dev server** (in one terminal):
+   ```bash
+   cd /Users/nikiv/org/linsa/linsa
+   f dev
+   ```
+
+2. **Wait for server to be ready** at `http://localhost:3000`
+
+## Running the Test
+
+In a separate terminal:
+
+```bash
+cd /Users/nikiv/org/linsa/linsa
+f test-jazz-stream
+```
+
+Or with shortcuts:
+```bash
+f test
+f tjs
+```
+
+## What the Test Does
+
+1. **Simulates stream-guard** uploading video chunks
+2. **POSTs to API** `/api/stream-recording`
+3. **Creates 5 chunks** of fake video data (256KB each)
+4. **Stores chunks** in `/Users/nikiv/fork-i/garden-co/jazz/glide-storage/stream-recordings/`
+5. **Verifies** chunk files exist on disk
+
+## Viewing the Results
+
+After the test completes:
+
+1. **Open Linsa streams page**:
+   ```
+   http://localhost:3000/streams
+   ```
+
+2. **Wait for auto-sync** (happens every 5 seconds)
+   - The page will fetch chunks from the API
+   - Convert them to Jazz FileStream
+   - Display the timeline
+
+3. **Open Glide browser**:
+   - Build and run Glide
+   - Timeline will appear on canvas
+   - Horizontal scrollable timeline showing the 5 chunks
+
+## Test Output
+
+The test will show:
+- Stream ID and key
+- Chunk upload progress
+- Storage location
+- Links to view the timeline
+
+## Manual Testing
+
+You can also manually POST chunks:
+
+```bash
+curl -X POST http://localhost:3000/api/stream-recording?action=start \
+  -H "Content-Type: application/json" \
+  -d '{
+    "streamId": "manual-test",
+    "title": "Manual Test Stream",
+    "startedAt": '$(date +%s000)',
+    "streamKey": "test-key"
+  }'
+
+# Upload a chunk
+echo "fake video data" | base64 | \
+  curl -X POST http://localhost:3000/api/stream-recording?action=chunk \
+  -H "Content-Type: application/json" \
+  -d @- <<EOF
+{
+  "streamId": "manual-test",
+  "chunkIndex": 0,
+  "data": "$(cat -)",
+  "timestamp": $(date +%s000)
+}
+EOF
+```
+
+## Cleanup
+
+Test recordings are stored in:
+```
+/Users/nikiv/fork-i/garden-co/jazz/glide-storage/stream-recordings/
+```
+
+You can delete test streams manually if needed.