feat(profiles): first-class profile switching — phase 0 baseline port (#820)

* feat(profiles): make profile switching actually scope the app (issue #781 follow-up)

* fix(profiles): inherit connection token when switching to same-dashboard profile (issue #781 follow-up)

* fix(chat): reset open session on profile switch + prefill login profile (desktop parity)

* fix(ws): inject profile into profile-scoped RPC params so chat follows the selected profile

* test(chat): de-poison SlashCommandDispatchRpcTest (drop static Dispatchers mock)

mockkStatic(Dispatchers::class) + a stubbed Dispatchers.IO bleeds JVM-wide and
breaks later classes in suite order (CI 2026-08-06: COMMAND_DISPATCH captures
cross-wired → ComparisonFailure on lower stack PRs). ChatViewModel gains an
injected ioDispatcher (38 sites); the slash test constructs the VM with the
test dispatcher so the IO stub is unnecessary.

---------

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/data/ws/HermesWsClient.kt

@@ -580,7 +580,13 @@ object HermesWsClient {
         onSent: ((String) -> Unit)? = null,
     ): String {
         val id = requestId.incrementAndGet().toString()
-        val request = JsonRpcRequest(id = id, method = method, params = params.mapValues { it.value.toJsonElement() })
+        val decoratedParams = WsProfileParams.decorate(method, params)
+        val request =
+            JsonRpcRequest(
+                id = id,
+                method = method,
+                params = decoratedParams.mapValues { it.value.toJsonElement() },
+            )
         val json = OkHttpProvider.json.encodeToString(request)
         if (BuildConfig.DEBUG) Log.d(TAG, "→ $json")
         synchronized(outboundLock) {

app/src/main/java/com/m57/hermescontrol/data/ws/WsMethods.kt

@@ -72,4 +72,54 @@ object WsMethods {
 
     /** Usage bars (token/cost breakdown the legacy credits block rendered). */
     const val USAGE_BARS = "usage.bars"
+
+    // ── Profile-scoped method set ────────────────────────────────────────
+    // Methods that the TUI gateway resolves against the per-profile
+    // HERMES_HOME / state.db when `params.profile` is present.
+    //
+    // Two categories on the server:
+    //   (a) @_profile_scoped (method_ctx.py) — binds HERMES_HOME via
+    //       ContextVar for the handler's lifetime.
+    //   (b) Manual params.get("profile") / _profile_db(params) — opens
+    //       the named profile's state.db explicitly.
+    //
+    // This set is the union of both.  Only methods the mobile app
+    // actually calls are listed (pet.* are included for completeness
+    // since they read per-profile config).  The set is intentionally an
+    // explicit allowlist: unknown / new methods default to un-scoped,
+    // which is safe — the server ignores an unrecognised `profile` key.
+
+    /**
+     * Methods whose server handler reads `params["profile"]` to resolve the
+     * correct per-profile data.  Used by [WsProfileParams] to decide which
+     * RPCs get the active profile injected automatically.
+     */
+    val PROFILE_SCOPED_METHODS: Set<String> =
+        setOf(
+            // Category (b): manual params.get("profile") / _profile_db
+            // Evidence: methods_session.py lines 42, 164, 232, 317, 845
+            SESSION_CREATE, // session.create
+            SESSION_LIST, // session.list
+            SESSION_RESUME, // session.resume
+            SESSION_DELETE, // session.delete
+            SESSION_STATUS, // session.status
+            // session.most_recent uses _profile_db(params) too, but
+            // mobile doesn't call it; documented for completeness.
+            // Category (a): @_profile_scoped decorator
+            // Evidence: methods_session.py @_profile_scoped at each @method
+            // Binds HERMES_HOME so config/skills/pets resolve to the
+            // focused profile.
+            "verification.status", // line 282
+            "pet.info", // line 1253
+            "pet.info.meta", // line 1279
+            "pet.cells", // line 1302
+            "pet.gallery", // line 1407
+            "pet.select", // line 1490
+            "pet.remove", // line 1517
+            "pet.export", // line 1547
+            "pet.rename", // line 1574
+            "pet.thumb", // line 1612
+            "pet.disable", // line 1647
+            "pet.scale", // line 1661
+        )
 }

app/src/main/java/com/m57/hermescontrol/data/ws/WsProfileParams.kt

@@ -0,0 +1,46 @@
+package com.m57.hermescontrol.data.ws
+
+import com.m57.hermescontrol.data.local.AuthManager
+
+/**
+ * WS-layer analog of [com.m57.hermescontrol.data.remote.ProfileScopeInterceptor].
+ *
+ * Injects `"profile"` into JSON-RPC `params` for profile-scoped methods so the
+ * TUI gateway resolves the correct `HERMES_HOME` / `state.db` for the selected
+ * profile.  Without this, WS RPCs always hit the backend's **launch** profile
+ * (usually "default"), even after the user switches profiles in the app.
+ *
+ * Rules (mirror the REST interceptor contract):
+ *  - If [AuthManager.getSelectedProfileId] is `null` → pass through unchanged
+ *    (legacy single-profile behavior).
+ *  - If the caller already supplied an explicit `"profile"` key in [params] →
+ *    explicit wins; do **not** overwrite.
+ *  - Only decorate methods in [WsMethods.PROFILE_SCOPED_METHODS].  Never touch
+ *    global / ops RPCs (`setup.*`, `gateway.*`, `auth.*`, ticket flows, etc.).
+ */
+object WsProfileParams {
+    /**
+     * Return a copy of [params] with `"profile"` injected when the active
+     * profile is set and the [method] is profile-scoped.  Returns [params]
+     * unchanged (same reference) when no injection is needed.
+     */
+    fun decorate(
+        method: String,
+        params: Map<String, Any>,
+    ): Map<String, Any> {
+        // No active profile → legacy single-profile behavior.
+        val profile = AuthManager.getSelectedProfileId() ?: return params
+
+        // Only scoped methods get the profile key.
+        if (method !in WsMethods.PROFILE_SCOPED_METHODS) return params
+
+        // Explicit profile param from the caller wins.
+        if (params.containsKey("profile")) return params
+
+        // Inject profile into a new map (params may be immutable / emptyMap).
+        return buildMap(params.size + 1) {
+            putAll(params)
+            put("profile", profile)
+        }
+    }
+}