refactor(phase5): Comprehensive stabilisation pass. De-duplicated App/Controller state, hardened session reset, and updated integration tests with deterministic polling.

config.toml

@@ -1,7 +1,7 @@
 [ai]
-provider = "gemini"
+provider = "gemini_cli"
 model = "gemini-2.5-flash-lite"
-temperature = 0.0
+temperature = 0.5
 top_p = 1.0
 max_tokens = 32000
 history_trunc_limit = 900000
@@ -24,7 +24,7 @@ bg_shader_enabled = false
 crt_filter_enabled = false
 separate_task_dag = false
 separate_usage_analytics = false
-separate_tier1 = true
+separate_tier1 = false
 separate_tier2 = false
 separate_tier3 = false
 separate_tier4 = false
@@ -77,7 +77,7 @@ logs_dir = "C:\\projects\\manual_slop\\logs"
 scripts_dir = "C:\\projects\\manual_slop\\scripts"
 
 [rag]
-enabled = false
+enabled = true
 embedding_provider = "gemini"
 chunk_size = 1000
 chunk_overlap = 200