feat(reticulum): complete messaging, calls, and P4 support

Add official Sideband/LXST messaging and telephony flows, realtime resource ownership, call and ping UI, durable unread state, and bounded Nomad/Micron browsing.

Integrate ESP32-P4/C6 gateway transport, TinyUSB CDC, ES8311 audio, shared Codec2 call media, Reticulum defaults, compatibility settings, and conformance coverage.

modules/ui_shared/include/ui/screens/chat/chat_conversation_styles.h

@@ -18,7 +18,7 @@ void apply_reply_label(lv_obj_t* label);
 
 // message row + bubble
 void apply_message_row(lv_obj_t* row);
-void apply_bubble(lv_obj_t* bubble, bool is_self);
+void apply_bubble(lv_obj_t* bubble, bool is_self, bool source_unverified = false);
 void apply_bubble_text(lv_obj_t* label);
 void apply_bubble_time(lv_obj_t* label);
 void apply_bubble_status(lv_obj_t* label);

modules/ui_shared/include/ui/screens/network/micron_markup_contract.h

@@ -7,6 +7,7 @@ namespace ui::screens::network::micron
 {
 
 constexpr std::size_t kMaxAnchorNameBytes = 48;
+constexpr std::size_t kMaxLinkTargetBytes = 160;
 constexpr std::size_t kMaxTableCells = 6;
 
 enum class Align : std::uint8_t
@@ -47,9 +48,28 @@ struct LinkFields
     char anchor[kMaxAnchorNameBytes] = {};
 };
 
+struct ColorToken
+{
+    bool valid = false;
+    std::uint32_t rgb = 0;
+    std::size_t consumed = 0;
+};
+
+struct PartialReference
+{
+    bool valid = false;
+    bool has_display_hint = false;
+    std::uint16_t display_hint = 0;
+    LinkTargetKind target_kind = LinkTargetKind::Unknown;
+    char target[kMaxLinkTargetBytes] = {};
+};
+
 bool anchor_name_char(char ch);
 void slug_from_text(const char* text, char* out, std::size_t out_len);
 
+bool parse_color_text(const char* text, std::size_t len, std::uint32_t* out);
+ColorToken parse_color_token(const char* line, std::size_t len, std::size_t index);
+
 TableOpenOptions parse_table_opening_tag(const char* line);
 std::size_t parse_table_cells(const char* row_text,
                               Span* cells,
@@ -64,7 +84,9 @@ bool append_anchor_to_target(const char* target,
                              char* out,
                              std::size_t out_len);
 LinkTargetKind classify_link_target(const char* target);
+const char* link_target_kind_label(LinkTargetKind kind);
 
 bool extract_partial_url(const char* line, char* out, std::size_t out_len);
+PartialReference parse_partial_reference(const char* line);
 
 } // namespace ui::screens::network::micron

modules/ui_shared/include/ui/screens/settings/settings_state.h

@@ -78,6 +78,8 @@ enum class SettingId : std::uint16_t
     RtWifiPort,
     RtWifiAuto,
     RtAnonymousPeer,
+    RtCallWire,
+    RtLocationRequests,
     NetUsePreset,
     NetPreset,
     NetBw,
@@ -252,6 +254,8 @@ struct SettingsData
     bool rt_wifi_gateway_enabled = true;
     bool rt_wifi_auto_connect = true;
     bool rt_anonymous_peer = false;
+    int rt_call_wire = 0;
+    bool rt_location_requests = false;
     char rt_display_name[32] = "--";
     char rt_identity_hash[36] = "--";
     char rt_lxmf_address[36] = "--";

modules/ui_shared/include/ui/widgets/foreground_operation_overlay.h

@@ -12,6 +12,7 @@ enum class Slot : std::uint8_t
     I18nFontLoad,
     RouteImage,
     SettingsAction,
+    ReticulumPing,
     Count,
 };
 

modules/ui_shared/include/ui/widgets/reticulum_ping_overlay.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include "chat/domain/reticulum_identity.h"
+
+#include <cstdint>
+
+namespace ui::widgets::reticulum_ping
+{
+
+void show_loading(
+    const std::uint8_t destination_hash[::chat::kReticulumPeerHashSize],
+    const char* display_name);
+void show_send_failure(const char* detail);
+void show_delivered(
+    const std::uint8_t destination_hash[::chat::kReticulumPeerHashSize],
+    std::uint32_t latency_ms,
+    std::uint8_t hops);
+void show_timeout(
+    const std::uint8_t destination_hash[::chat::kReticulumPeerHashSize],
+    std::uint32_t elapsed_ms);
+void dismiss();
+bool active_for(
+    const std::uint8_t destination_hash[::chat::kReticulumPeerHashSize]);
+
+} // namespace ui::widgets::reticulum_ping