feat(SNNBot): upgrade bot API, fix debug overlay and aiming lines

- Upgrade to robocode_tankroyale_botapi v1.0.7 (SVG viewBox fix)
- Fix Y-axis mirror in aiming line toXY helper
- Resize debug panel to half arena width/height
- Replace neuron boxes with barcode-style spike lines
- Thickness-encoded weight connections (all 216 lines)
- Add aiming line legend (top-left, white text)
- Dynamic aiming line length (distance + 50px overshoot)

SNNBot_garage/tests/config.nims

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+--path:"../../common_libs"

SNNBot_garage/tests/test_basic_battle.nim

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+## Integration test: SNNBot vs SittingDuck.
+## Requires a running TR server (set TR_SERVER_JAR / TR_BATTLE_RUNNER env vars).
+## Also includes an offline parseServerOutput unit test — no Java needed.
+
+import std/[os, unittest]
+import test_framework/battle_result
+
+# ---------- offline unit test (no server needed) ----------
+
+suite "parseServerOutput":
+  test "parses a 1-round battle fixture":
+    const fixture = """
+{"event":"game_started","bots":["SNNBot","SittingDuck"]}
+{"event":"round_ended","round":1,"results":[{"name":"SNNBot","score":100,"rank":1,"survived":true},{"name":"SittingDuck","score":0,"rank":2,"survived":false}]}
+{"event":"battle_ended","results":[{"name":"SNNBot","totalScore":100,"rank":1,"firstPlaces":1,"survivalCount":1},{"name":"SittingDuck","totalScore":0,"rank":2,"firstPlaces":0,"survivalCount":0}]}
+"""
+    let r = parseServerOutput(fixture)
+
+    check r.bots == @["SNNBot", "SittingDuck"]
+    check r.rounds.len == 1
+    check r.rounds[0].results[0].name == "SNNBot"
+    check r.rounds[0].results[0].survived == true
+    check r.results.len == 2
+    check r.winners == @["SNNBot"]
+
+# ---------- integration tests (require TR server + BattleRunner JARs) ----------
+
+const
+  DefaultServerJar  = "/home/davide/Projects/tank-royale/server/build/libs/robocode-tankroyale-server-0.35.5-all.jar"
+  DefaultRunnerJar  = "/home/davide/Projects/tank-royale/runner/examples/lib/robocode-tankroyale-runner.jar"
+
+let serverJar  = getEnv("TR_SERVER_JAR",    DefaultServerJar)
+let runnerJar  = getEnv("TR_BATTLE_RUNNER", DefaultRunnerJar)
+if not fileExists(serverJar) or not fileExists(runnerJar):
+  echo "Skipping integration tests: JAR files not found (set TR_SERVER_JAR / TR_BATTLE_RUNNER to override)"
+  quit(0)
+
+import test_framework/test_framework
+
+const
+  snnbotDir      = currentSourcePath().parentDir.parentDir
+  sittingDuckDir = currentSourcePath().parentDir.parentDir.parentDir /
+                   "common_libs" / "test_framework" / "adversaries" / "SittingDuck"
+
+suite "SNNBot integration battles":
+  test "completes 1 round vs SittingDuck without crashing":
+    let r = runBattle(@[snnbotDir, sittingDuckDir], rounds = 1)
+
+    check r.rounds.len == 1
+    check r.results.len == 2
+
+    var snn, duck: BotResult
+    for b in r.results:
+      if b.name == "SNNBot":       snn = b
+      if b.name == "SittingDuck": duck = b
+    check snn.name == "SNNBot"
+    check duck.name == "SittingDuck"
+
+    # Just assert it completed and scored something — no aiming quality check
+    check snn.totalScore >= 0
+    check duck.totalScore >= 0
+
+    for rnd in r.rounds:
+      check rnd.results.len == 2
+      for br in rnd.results:
+        check br.score >= 0