Make tap freezing configurable, add toggles to other functions, minor UI changes

source/config.h

@@ -53,7 +53,15 @@
 
 // ─── Persistence ──────────────────────────────────────────────────────────────
 #define CONFIG_FILENAME  "/imu_mouse_cfg.bin"
-#define CONFIG_MAGIC     0xDEAD123AUL
+#define CONFIG_MAGIC     0xDEAD123CUL
+
+// ─── Runtime feature-override flags (cfg.featureFlags bitmask) ───────────────
+// These mirror the compile-time FEATURE_* defines but can be toggled at runtime
+// via the web UI and persisted in flash.  Bits not listed here are reserved = 0.
+#define FLAG_TAP_ENABLED        0x01  // Tap detection active (requires restart)
+#define FLAG_TEMP_COMP_ENABLED  0x02  // Temperature gyro-drift compensation
+#define FLAG_AUTO_RECAL_ENABLED 0x04  // Auto-recalibrate after long idle
+#define FLAG_ALL_DEFAULT        (FLAG_TAP_ENABLED | FLAG_TEMP_COMP_ENABLED | FLAG_AUTO_RECAL_ENABLED)
 
 // ─── Enums ────────────────────────────────────────────────────────────────────
 enum CurveType   : uint8_t { CURVE_LINEAR=0, CURVE_SQUARE=1, CURVE_SQRT=2 };
@@ -83,27 +91,30 @@ struct Config {
   TapAction  tapAction;    // what a double-tap does
   uint8_t    tapKey;       // HID keycode (used when tapAction == TAP_ACTION_KEY)
   uint8_t    tapMod;       // HID modifier byte (used when tapAction == TAP_ACTION_KEY)
-  float      jerkThreshold; // jerk² threshold for tap-freeze detection
+  float      jerkThreshold;    // jerk² threshold for tap-freeze detection
+  uint8_t    tapFreezeEnabled; // 1 = enable jerk-based cursor freeze during taps
+  uint8_t    featureFlags;     // bitmask of FLAG_* — runtime feature overrides
 };
 extern Config cfg;
 extern const Config CFG_DEFAULTS;
 
-// ─── ConfigBlob (over BLE, 20 bytes) ─────────────────────────────────────────
+// ─── ConfigBlob (over BLE, 25 bytes) ─────────────────────────────────────────
 struct __attribute__((packed)) ConfigBlob {
-  float   sensitivity;    // [0]
-  float   deadZone;       // [4]
-  float   accelStrength;  // [8]
-  uint8_t curve;          // [12]
-  uint8_t axisFlip;       // [13]
-  uint8_t chargeMode;     // [14]
-  uint8_t tapThreshold;   // [15]  1–31
-  uint8_t tapAction;      // [16]  TapAction enum
-  uint8_t tapKey;         // [17]  HID keycode
-  uint8_t tapMod;         // [18]  HID modifier
-  uint8_t _pad;           // [19]
-  float   jerkThreshold;  // [20]  jerk² tap-freeze threshold
+  float   sensitivity;       // [0]
+  float   deadZone;          // [4]
+  float   accelStrength;     // [8]
+  uint8_t curve;             // [12]
+  uint8_t axisFlip;          // [13]
+  uint8_t chargeMode;        // [14]
+  uint8_t tapThreshold;      // [15]  1–31
+  uint8_t tapAction;         // [16]  TapAction enum
+  uint8_t tapKey;            // [17]  HID keycode
+  uint8_t tapMod;            // [18]  HID modifier
+  uint8_t tapFreezeEnabled;  // [19]  1 = enable jerk-based cursor freeze during taps
+  float   jerkThreshold;     // [20]  jerk² tap-freeze threshold
+  uint8_t featureFlags;      // [24]  FLAG_* bitmask — runtime feature overrides
 };
-static_assert(sizeof(ConfigBlob) == 24, "ConfigBlob must be 24 bytes");
+static_assert(sizeof(ConfigBlob) == 25, "ConfigBlob must be 25 bytes");
 
 // ─── TelemetryPacket (24 bytes) ───────────────────────────────────────────────
 #ifdef FEATURE_TELEMETRY