docs: reorganize continue.md for better logical flow

- Move Tooling & Sim Engine Capabilities next to Test Refactoring Status
  (status depends on the capability matrix, so they belong together)
- Merge Tooling and Sim Engine Capabilities into single section
- Remove 'Sim Engine Fix Applied' section (applied, documented in commit)
- Add SI units requirement to precalc scripts rule
- Update cross-references (Section 5 for capability matrix)

continue.md

@@ -1,32 +1,5 @@
 # Test Refactoring Optimization Strategy
 
-## Tooling
-- `scripts/sim_engine.py` — Generic orbital mechanics simulator (Python, TOML 1.0 configs)
-  - Replicates C++ physics: Kepler propagation, orbital↔Cartesian transforms, drift detection
-  - Multi-body hierarchical propagation with global/local coordinate tracking
-  - Use for precalculating expected values (transition times, final states, energy conservation)
-- TOML configs in `tests/` must use TOML 1.0 inline table syntax (single-line `{}`)
-  - Old configs in `old_tests/` use multiline inline tables (toml-c17 style) — keep for reference
-  - Python's `tomllib` requires single-line inline tables
-
-## Sim Engine Capabilities
-### Implemented
-- Body propagation (elliptical + parabolic via Barker's equation)
-- Orbital↔Cartesian transforms (full z-x-z Euler rotation)
-- Velocity drift detection and element reconstruction
-- Global coordinate computation (hierarchical parent→child)
-- Spacecraft struct, loading, propagation
-- Impulsive burns (prograde, retrograde, normal, antinormal, radial_in, radial_out, custom)
-- TOML 1.0 config parsing
-### NOT Implemented (notify the user before beginning to refactor)
-- SOI transitions
-- Maneuver trigger system (TRIGGER_TIME, TRIGGER_TRUE_ANOMALY)
-- Hohmann transfer calculations
-- Rendezvous planning
-- OrbitTracker
-- Energy functions (KE, PE, total)
-- Hyperbolic propagation
-
 ## Refactoring Rules
 
 ### 1. Structure
@@ -66,6 +39,7 @@
 - **Always output local-frame values** (distances from parent, not global from origin).
   - C++ tests typically use local coordinates (e.g., `vec3_distance(craft->local_position, (Vec3){0,0,0})`).
   - Global distances are dominated by parent body positions (e.g., Earth-Sun distance swamps LEO orbit).
+- **Always output SI units** (meters, m/s, seconds) — C++ tests use SI internally.
 - Output C++-style comments with precalculated constants for embedding in the test.
 - Run with: `python3 scripts/precalc_<test_name>.py`
 - If sim_engine.py lacks a feature, use analytical formulas instead (**but notify the user what feature was missing**)
@@ -75,7 +49,7 @@
 ### Step 1: Refactor
 - Verify the test file has a TOML config in `old_tests/`. If it doesn't, skip — it's likely hardcoded.
 - Check if the test is already in `tests/` (already refactored). Skip if so.
-- Check the capability matrix — if the test needs SOI, maneuvers, rendezvous, etc., flag this before starting.
+- Check the capability matrix in Section 5 — if the test needs SOI, maneuvers, rendezvous, etc., flag this before starting.
 - Process **one test file at a time**.
 - Create `scripts/precalc_<test_name>.py` and run it to get expected values.
 - Copy from `old_tests/` to `tests/`, rewrite using the pattern from `test_true_anomaly_roundtrip.cpp`.
@@ -102,6 +76,36 @@
 - **Always ask for review** before moving to the next file.
 - **Only commit when asked.**
 
+## Tooling & Sim Engine Capabilities
+
+### Tooling
+- `scripts/sim_engine.py` — Generic orbital mechanics simulator (Python, TOML 1.0 configs)
+  - Replicates C++ physics: Kepler propagation, orbital↔Cartesian transforms, drift detection
+  - Multi-body hierarchical propagation with global/local coordinate tracking
+  - Use for precalculating expected values (transition times, final states, energy conservation)
+- TOML configs in `tests/` must use TOML 1.0 inline table syntax (single-line `{}`)
+  - Old configs in `old_tests/` use multiline inline tables (toml-c17 style) — keep for reference
+  - Python's `tomllib` requires single-line inline tables
+
+### Sim Engine Capabilities
+#### Implemented
+- Body propagation (elliptical + parabolic via Barker's equation)
+- Orbital↔Cartesian transforms (full z-x-z Euler rotation)
+- Velocity drift detection and element reconstruction
+- Global coordinate computation (hierarchical parent→child)
+- Spacecraft struct, loading, propagation
+- Impulsive burns (prograde, retrograde, normal, antinormal, radial_in, radial_out, custom)
+- TOML 1.0 config parsing
+
+#### NOT Implemented (notify the user before beginning to refactor)
+- SOI transitions
+- Maneuver trigger system (TRIGGER_TIME, TRIGGER_TRUE_ANOMALY)
+- Hohmann transfer calculations
+- Rendezvous planning
+- OrbitTracker
+- Energy functions (KE, PE, total)
+- Hyperbolic propagation
+
 ## Test Refactoring Status
 
 ### Completed
@@ -110,9 +114,6 @@
 - `test_cartesian_to_elements_basic` ✅ — Element round-trip conversion (semi-major axis, eccentricity, true anomaly, inclination, radius, velocity)
 - `test_parabolic_orbit` ✅ — Parabolic orbit energy conservation + escape trajectory + initial conditions
 
-### Sim Engine Fix Applied
-- Added `semi_latus_rectum` → `OrbitalElements.p` mapping in `bodies_from_config()` and `spacecraft_from_config()` (needed for parabolic orbit configs)
-
 ### Can Refactor Now (sim_engine.py supports all features needed)
 - `test_extreme_eccentricity` — high-eccentricity orbits
 - `test_extreme_orientation_mixed` — extreme inclinations/eccentricities