fix(mcp): apply_patch preserves schema-defaulted ids in multi-op batches

SceneBridge.applyPatch now threads the Zod-parsed node through to the
apply phase instead of the raw input. Previously, when a caller sent a
create patch without an `id` field, the schema's objectId default ran
during dry-run parsing but only in `res.data`; the apply phase pushed
the unparsed `p.node` (no id) to the store, so subsequent tools that
walked `level.children` crashed on undefined entries (e.g.
duplicate_level -> cloneLevelSubtree -> extractIdPrefix(undefined)).

Also adds test-reports/ artefacts from live end-to-end testing:
- t1-stdio: 21/21 tools pass via stdio (~106ms)
- t2-http: connect/single-session behaviour (HTTP transport quirk
  documented)
- t3-scenario: 2-bedroom apartment built end-to-end — 12/12 steps
  after this fix (24 final nodes, validate=true, apartment.json
  exported)
- t4-errors: 24/24 invalid-input cases rejected with proper MCP errors
- t5-resources-prompts: 4/4 resources, 3/3 prompts, dev server
  /api/health 200 OK

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/mcp/test-reports/t3-scenario/REPORT.md

@@ -0,0 +1,81 @@
+# T3 Scenario Report — 2-Bedroom Apartment
+
+Generated: 2026-04-18T16:20:27.809Z
+Transport: http (shared HTTP server)
+Server URL: http://localhost:3917/mcp
+
+## Step-by-step
+
+### Step 1: discover OK (4ms)
+
+- Summary: building=building_bfqg91ai9ijps9ej, level=level_wyuoxj87czq3v0re (of 1 buildings, 1 levels)
+- Node IDs (2): building_bfqg91ai9ijps9ej, level_wyuoxj87czq3v0re
+
+### Step 2: perimeter walls OK (2ms)
+
+- Summary: created 4 perimeter walls (result.createdIds=["wall_y87bsrljd2245n51","wall_sja6jpda73tlhxwb","wall_aegff27krjwgmkmi","wall_dcymglyle9ff09ti"])
+- Node IDs (4): wall_y87bsrljd2245n51, wall_sja6jpda73tlhxwb, wall_aegff27krjwgmkmi, wall_dcymglyle9ff09ti
+
+### Step 3: interior partitions OK (1ms)
+
+- Summary: created 7 interior walls
+- Node IDs (7): wall_rl83cc5tnbf4b34j, wall_qv53jm9kvl7k6slf, wall_8y52fwzco2ep7fb1, wall_hrfixeusz7zb7x63, wall_1ullk9bm6dw15i9t, wall_c4fjjswnk0mprctm, wall_p359pffjf3qs59cy
+
+### Step 4: set zones OK (3ms)
+
+- Summary: created 4 zones: bedroom-1, bedroom-2, bathroom, living-kitchen
+- Node IDs (4): zone_3fyksm10tb0dhn1e, zone_u95l1bt35jci3gvu, zone_r9ma8tvsqt9w1zey, zone_l189q61kf9ra2m8t
+
+### Step 5: cut openings OK (6ms)
+
+- Summary: 3 doors, 3 windows
+- Node IDs (6): door_cjzja4lt8owg88wg, door_bs7bf0azevq9vd76, door_o8etwqsemfgj5mkj, window_47x40mtv2l4ca9p4, window_n09awmg5m3ct4fvn, window_xlta3f3f0cnmbti3
+
+### Step 6: validate scene OK (1ms)
+
+- Summary: valid=true, errors=0
+
+### Step 7: measure furthest zones OK (3ms)
+
+- Summary: furthest: zone_3fyksm10tb0dhn1e <-> zone_u95l1bt35jci3gvu = 7.000m
+- Node IDs (2): zone_3fyksm10tb0dhn1e, zone_u95l1bt35jci3gvu
+
+### Step 8: export json OK (1ms)
+
+- Summary: exported 15392 bytes -> apartment.json
+
+### Step 9: undo 3 steps OK (2ms)
+
+- Summary: undone=3, nodes 24 -> 21 (delta=3)
+
+### Step 10: redo 3 steps OK (2ms)
+
+- Summary: redone=3, nodes 21 -> 24
+
+### Step 11: duplicate level + validate OK (2ms)
+
+- Summary: newLevelId=level_cxvltlqvgqcasiep, cloned=22, valid=true, errors=0
+- Node IDs (1): level_cxvltlqvgqcasiep
+
+### Step 12: delete duplicated level OK (3ms)
+
+- Summary: deleted 22 nodes; nodes 46 -> 24
+- Node IDs (22): level_cxvltlqvgqcasiep, wall_xhn7o9bfpmcv2znr, window_0qb4bgvzp46y412o, window_cjk6a6zwsn48dj5u, wall_hgatfahp4i53s139, wall_fp25ulcwqmsim8p5, window_jv0g8uos313ljbbe, wall_mjue0xaodm8d3vzi, wall_brw2c9vg502md7a0, wall_1at54a0mfxgq2txb, door_l8k2adas2djwpcf8, wall_6m920gigvtn113af, wall_2hazwrgv922l3t6q, door_a62eecbdzpdoqnlo, wall_11h43exay41fub7f, door_06dpidftldcoaisv, wall_u7e1gp0xbir5112y, wall_jbwbwvgt9lzw51mk, zone_hkp5wsyw7aydi175, zone_rpqx5ul6bl1tpdmd ...
+
+## Final Counts
+
+- Total nodes: 24
+- Zones: 4
+- Doors: 3
+- Windows: 3
+- Post-step-5 node count: 24
+
+## Validation
+
+- Valid: true
+- Errors: 0
+
+## Transport Notes
+
+- Used transport: **http**
+- Reason: shared HTTP server