refactor(structure): relocate remaining legacy files out of main

AGENTS.md

@@ -5,13 +5,13 @@
 - `components/domain/{include,internal,src}`: business-domain services.
 - `components/control_plane/{include,internal,src}`: lifecycle, policy, health, retry/backoff orchestration.
 - `components/app_composition/{include,internal,src}`: composition boundary; `app_main` only wires modules.
-- `main/dependency_whitelist.md`: approved exceptions for unavoidable lateral dependencies.
+- `dependency_whitelist.md`: approved exceptions for unavoidable lateral dependencies.
-- `main/third_party/`, `components/domain/assets/fonts/`, `tools/`: vendored code, embedded assets, utility scripts.
+- `components/domain/third_party/`, `components/domain/assets/fonts/`, `tools/`: vendored code, embedded assets, utility scripts.
 - `build/`: generated artifacts only (ignored).
 
 ## Mandatory Architecture Constraints
 1. Dependencies are one-way only: `app_composition -> control_plane -> domain -> platform`.
-2. Lateral direct dependencies are forbidden unless listed in `main/dependency_whitelist.md`.
+2. Lateral direct dependencies are forbidden unless listed in `dependency_whitelist.md`.
 3. Cross-domain communication must use events or Port interfaces; never include another domain's `internal/*.h`.
 4. Each component keeps one public header in `include/`; private headers stay in `internal/` via `PRIV_INCLUDE_DIRS`.
 5. Runtime state must have a single source of truth (SSOT); other modules subscribe/query instead of copying fields.

components/domain/CMakeLists.txt

@@ -15,10 +15,10 @@ idf_component_register(
         "src/voice_interaction_ws_audio.c"
         "src/voice_interaction_marker.c"
         "src/voice_interaction_tasks.c"
-        "../../main/third_party/qrcodegen.c"
+        "third_party/qrcodegen.c"
     INCLUDE_DIRS
         "include"
-        "../../main/third_party"
+        "third_party"
     PRIV_INCLUDE_DIRS
         "internal"
     REQUIRES